[PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[B K Karthik]

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fixed a sparse warning by changing the type in
assignment from void [noderef] __user * to unsigned int *
(different address space)

Signed-off-by: B K Karthik <karthik.bk2000@live.com>
---
 drivers/staging/comedi/comedi_fops.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index 3f70e5dfac39..4cc012e231b7 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
 	cmd->scan_end_arg = v32.scan_end_arg;
 	cmd->stop_src = v32.stop_src;
 	cmd->stop_arg = v32.stop_arg;
-	cmd->chanlist = compat_ptr(v32.chanlist);
+	cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
 	cmd->chanlist_len = v32.chanlist_len;
 	cmd->data = compat_ptr(v32.data);
 	cmd->data_len = v32.data_len;
-- 
2.20.1


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Re: [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[Greg Kroah-Hartman]

On Wed, Jul 15, 2020 at 12:48:13AM -0400, B K Karthik wrote:
> fixed a sparse warning by changing the type in
> assignment from void [noderef] __user * to unsigned int *
> (different address space)
> 
> Signed-off-by: B K Karthik <karthik.bk2000@live.com>
> ---
>  drivers/staging/comedi/comedi_fops.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
> index 3f70e5dfac39..4cc012e231b7 100644
> --- a/drivers/staging/comedi/comedi_fops.c
> +++ b/drivers/staging/comedi/comedi_fops.c
> @@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
>  	cmd->scan_end_arg = v32.scan_end_arg;
>  	cmd->stop_src = v32.stop_src;
>  	cmd->stop_arg = v32.stop_arg;
> -	cmd->chanlist = compat_ptr(v32.chanlist);
> +	cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
>  	cmd->chanlist_len = v32.chanlist_len;
>  	cmd->data = compat_ptr(v32.data);
>  	cmd->data_len = v32.data_len;

Always run your patches through checkpatch before sending them, so you
do not have a grumpy maintainer telling you that you have to run
checkpatch on your patch before sending them.

thanks,

greg k-h

Re: [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[B K Karthik]

On Wed, Jul 15, 2020 at 3:08 AM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> On Wed, Jul 15, 2020 at 12:48:13AM -0400, B K Karthik wrote:
> > fixed a sparse warning by changing the type in
> > assignment from void [noderef] __user * to unsigned int *
> > (different address space)
> >
> > Signed-off-by: B K Karthik <karthik.bk2000@live.com>
> > ---
> >  drivers/staging/comedi/comedi_fops.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
> > index 3f70e5dfac39..4cc012e231b7 100644
> > --- a/drivers/staging/comedi/comedi_fops.c
> > +++ b/drivers/staging/comedi/comedi_fops.c
> > @@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
> >       cmd->scan_end_arg = v32.scan_end_arg;
> >       cmd->stop_src = v32.stop_src;
> >       cmd->stop_arg = v32.stop_arg;
> > -     cmd->chanlist = compat_ptr(v32.chanlist);
> > +     cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
> >       cmd->chanlist_len = v32.chanlist_len;
> >       cmd->data = compat_ptr(v32.data);
> >       cmd->data_len = v32.data_len;
>
> Always run your patches through checkpatch before sending them, so you
> do not have a grumpy maintainer telling you that you have to run
> checkpatch on your patch before sending them.

I will, Sorry for that.

But this particular error which showed up after running checkpatch is
something 'git format-patch' does unintentionally.
It has been reported to the maintainers.

thanks,

karthik

Re: [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[Greg Kroah-Hartman]

On Wed, Jul 15, 2020 at 01:56:45PM +0530, B K Karthik wrote:
> On Wed, Jul 15, 2020, 12:38 PM Greg Kroah-Hartman <
> gregkh@linuxfoundation.org> wrote:
> 
> > On Wed, Jul 15, 2020 at 12:48:13AM -0400, B K Karthik wrote:
> > > fixed a sparse warning by changing the type in
> > > assignment from void [noderef] __user * to unsigned int *
> > > (different address space)
> > >
> > > Signed-off-by: B K Karthik <karthik.bk2000@live.com>
> > > ---
> > >  drivers/staging/comedi/comedi_fops.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/staging/comedi/comedi_fops.c
> > b/drivers/staging/comedi/comedi_fops.c
> > > index 3f70e5dfac39..4cc012e231b7 100644
> > > --- a/drivers/staging/comedi/comedi_fops.c
> > > +++ b/drivers/staging/comedi/comedi_fops.c
> > > @@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
> > >       cmd->scan_end_arg = v32.scan_end_arg;
> > >       cmd->stop_src = v32.stop_src;
> > >       cmd->stop_arg = v32.stop_arg;
> > > -     cmd->chanlist = compat_ptr(v32.chanlist);
> > > +     cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
> > >       cmd->chanlist_len = v32.chanlist_len;
> > >       cmd->data = compat_ptr(v32.data);
> > >       cmd->data_len = v32.data_len;
> >
> > Always run your patches through checkpatch before sending them, so you
> > do not have a grumpy maintainer telling you that you have to run
> > checkpatch on your patch before sending them.
> >
> 
> I will. Sorry for that.
> 
> But the error that's being shown in this patch is something that comes up
> on its own.

No it is not.

> git format-patch leaves trailing whitespace in blank lines.

It does?  Where is any trailing whitespace here?  That's not the issue.

> It has been reported to the maintainers.

It was?  Where?

thanks,

greg k-h

Re: [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[B K Karthik]

On Wed, Jul 15, 2020 at 4:31 AM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> On Wed, Jul 15, 2020 at 01:56:45PM +0530, B K Karthik wrote:
> > On Wed, Jul 15, 2020, 12:38 PM Greg Kroah-Hartman <
> > gregkh@linuxfoundation.org> wrote:
> >
> > > On Wed, Jul 15, 2020 at 12:48:13AM -0400, B K Karthik wrote:
> > > > fixed a sparse warning by changing the type in
> > > > assignment from void [noderef] __user * to unsigned int *
> > > > (different address space)
> > > >
> > > > Signed-off-by: B K Karthik <karthik.bk2000@live.com>
> > > > ---
> > > >  drivers/staging/comedi/comedi_fops.c | 2 +-
> > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/staging/comedi/comedi_fops.c
> > > b/drivers/staging/comedi/comedi_fops.c
> > > > index 3f70e5dfac39..4cc012e231b7 100644
> > > > --- a/drivers/staging/comedi/comedi_fops.c
> > > > +++ b/drivers/staging/comedi/comedi_fops.c
> > > > @@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
> > > >       cmd->scan_end_arg = v32.scan_end_arg;
> > > >       cmd->stop_src = v32.stop_src;
> > > >       cmd->stop_arg = v32.stop_arg;
> > > > -     cmd->chanlist = compat_ptr(v32.chanlist);
> > > > +     cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
> > > >       cmd->chanlist_len = v32.chanlist_len;
> > > >       cmd->data = compat_ptr(v32.data);
> > > >       cmd->data_len = v32.data_len;
> > >
> > > Always run your patches through checkpatch before sending them, so you
> > > do not have a grumpy maintainer telling you that you have to run
> > > checkpatch on your patch before sending them.
> > >
> >
> > I will. Sorry for that.
> >
> > But the error that's being shown in this patch is something that comes up
> > on its own.
>
> No it is not.
>
> > git format-patch leaves trailing whitespace in blank lines.
>
> It does?  Where is any trailing whitespace here?  That's not the issue.

To give you an example,
https://lore.kernel.org/lkml/20200714132350.naekk4zqivpuaedi@pesu-pes-edu/
was a patch i submitted recently.
This is what checkpatch has to say:

$ perl scripts/checkpatch.pl -f
../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
ERROR: trailing whitespace
#21: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:21:
+ $

ERROR: trailing whitespace
#23: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:23:
+ $

ERROR: trailing whitespace
#30: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:30:
+ $

ERROR: trailing whitespace
#37: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:37:
+ $

ERROR: trailing whitespace
#44: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:44:
+ $

ERROR: trailing whitespace
#51: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:51:
+-- $

total: 6 errors, 0 warnings, 53 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

NOTE: Whitespace errors detected.
      You may wish to use scripts/cleanpatch or scripts/cleanfile

../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Does this happen only to patches I make? Am I making a silly mistake
while making a patch?
I use 'git format-patch -1' to generate the patch file.
If I am going wrong somewhere, please let me know.

>
> > It has been reported to the maintainers.
>
> It was?  Where?

I am extremely sorry, I should have verified if it was indeed reported
before telling it out.
It has not been reported (yet).
I apologise for my mistake.

thanks,

karthik

Re: [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[B K Karthik]

On Wed, Jul 15, 2020 at 4:41 AM B K Karthik <bkkarthik@pesu.pes.edu> wrote:
>
> On Wed, Jul 15, 2020 at 4:31 AM Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >
> > On Wed, Jul 15, 2020 at 01:56:45PM +0530, B K Karthik wrote:
> > > On Wed, Jul 15, 2020, 12:38 PM Greg Kroah-Hartman <
> > > gregkh@linuxfoundation.org> wrote:
> > >
> > > > On Wed, Jul 15, 2020 at 12:48:13AM -0400, B K Karthik wrote:
> > > > > fixed a sparse warning by changing the type in
> > > > > assignment from void [noderef] __user * to unsigned int *
> > > > > (different address space)
> > > > >
> > > > > Signed-off-by: B K Karthik <karthik.bk2000@live.com>
> > > > > ---
> > > > >  drivers/staging/comedi/comedi_fops.c | 2 +-
> > > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > >
> > > > > diff --git a/drivers/staging/comedi/comedi_fops.c
> > > > b/drivers/staging/comedi/comedi_fops.c
> > > > > index 3f70e5dfac39..4cc012e231b7 100644
> > > > > --- a/drivers/staging/comedi/comedi_fops.c
> > > > > +++ b/drivers/staging/comedi/comedi_fops.c
> > > > > @@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
> > > > >       cmd->scan_end_arg = v32.scan_end_arg;
> > > > >       cmd->stop_src = v32.stop_src;
> > > > >       cmd->stop_arg = v32.stop_arg;
> > > > > -     cmd->chanlist = compat_ptr(v32.chanlist);
> > > > > +     cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
> > > > >       cmd->chanlist_len = v32.chanlist_len;
> > > > >       cmd->data = compat_ptr(v32.data);
> > > > >       cmd->data_len = v32.data_len;
> > > >
> > > > Always run your patches through checkpatch before sending them, so you
> > > > do not have a grumpy maintainer telling you that you have to run
> > > > checkpatch on your patch before sending them.
> > > >
> > >
> > > I will. Sorry for that.
> > >
> > > But the error that's being shown in this patch is something that comes up
> > > on its own.
> >
> > No it is not.
> >
> > > git format-patch leaves trailing whitespace in blank lines.
> >
> > It does?  Where is any trailing whitespace here?  That's not the issue.
>
> To give you an example,
> https://lore.kernel.org/lkml/20200714132350.naekk4zqivpuaedi@pesu-pes-edu/
> was a patch i submitted recently.
> This is what checkpatch has to say:
>
> $ perl scripts/checkpatch.pl -f
> ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> ERROR: trailing whitespace
> #21: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:21:
> + $
>
> ERROR: trailing whitespace
> #23: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:23:
> + $
>
> ERROR: trailing whitespace
> #30: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:30:
> + $
>
> ERROR: trailing whitespace
> #37: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:37:
> + $
>
> ERROR: trailing whitespace
> #44: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:44:
> + $
>
> ERROR: trailing whitespace
> #51: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:51:
> +-- $
>
> total: 6 errors, 0 warnings, 53 lines checked
>
> NOTE: For some of the reported defects, checkpatch may be able to
>       mechanically convert to the typical style using --fix or --fix-inplace.
>
> NOTE: Whitespace errors detected.
>       You may wish to use scripts/cleanpatch or scripts/cleanfile
>
> ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> has style problems, please review.
>
> NOTE: If any of the errors are false positives, please report
>       them to the maintainer, see CHECKPATCH in MAINTAINERS.
>
> Does this happen only to patches I make? Am I making a silly mistake
> while making a patch?
> I use 'git format-patch -1' to generate the patch file.
> If I am going wrong somewhere, please let me know.

Also, The patch I sent (this thread):
$ perl scripts/checkpatch.pl -f
./0001-staging-comedi-comedi_fops.c-changed-void-__user-to-.patch
ERROR: trailing whitespace
#29: FILE: ./0001-staging-comedi-comedi_fops.c-changed-void-__user-to-.patch:29:
+-- $

total: 1 errors, 0 warnings, 31 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

NOTE: Whitespace errors detected.
      You may wish to use scripts/cleanpatch or scripts/cleanfile

./0001-staging-comedi-comedi_fops.c-changed-void-__user-to-.patch has
style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.

Am I using 'git format-patch' or 'checkpatch.pl' the wrong way?

thanks,

karthik

Re: [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[Greg Kroah-Hartman]

On Wed, Jul 15, 2020 at 04:41:52AM -0400, B K Karthik wrote:
> On Wed, Jul 15, 2020 at 4:31 AM Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >
> > On Wed, Jul 15, 2020 at 01:56:45PM +0530, B K Karthik wrote:
> > > On Wed, Jul 15, 2020, 12:38 PM Greg Kroah-Hartman <
> > > gregkh@linuxfoundation.org> wrote:
> > >
> > > > On Wed, Jul 15, 2020 at 12:48:13AM -0400, B K Karthik wrote:
> > > > > fixed a sparse warning by changing the type in
> > > > > assignment from void [noderef] __user * to unsigned int *
> > > > > (different address space)
> > > > >
> > > > > Signed-off-by: B K Karthik <karthik.bk2000@live.com>
> > > > > ---
> > > > >  drivers/staging/comedi/comedi_fops.c | 2 +-
> > > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > >
> > > > > diff --git a/drivers/staging/comedi/comedi_fops.c
> > > > b/drivers/staging/comedi/comedi_fops.c
> > > > > index 3f70e5dfac39..4cc012e231b7 100644
> > > > > --- a/drivers/staging/comedi/comedi_fops.c
> > > > > +++ b/drivers/staging/comedi/comedi_fops.c
> > > > > @@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
> > > > >       cmd->scan_end_arg = v32.scan_end_arg;
> > > > >       cmd->stop_src = v32.stop_src;
> > > > >       cmd->stop_arg = v32.stop_arg;
> > > > > -     cmd->chanlist = compat_ptr(v32.chanlist);
> > > > > +     cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
> > > > >       cmd->chanlist_len = v32.chanlist_len;
> > > > >       cmd->data = compat_ptr(v32.data);
> > > > >       cmd->data_len = v32.data_len;
> > > >
> > > > Always run your patches through checkpatch before sending them, so you
> > > > do not have a grumpy maintainer telling you that you have to run
> > > > checkpatch on your patch before sending them.
> > > >
> > >
> > > I will. Sorry for that.
> > >
> > > But the error that's being shown in this patch is something that comes up
> > > on its own.
> >
> > No it is not.
> >
> > > git format-patch leaves trailing whitespace in blank lines.
> >
> > It does?  Where is any trailing whitespace here?  That's not the issue.
> 
> To give you an example,
> https://lore.kernel.org/lkml/20200714132350.naekk4zqivpuaedi@pesu-pes-edu/
> was a patch i submitted recently.
> This is what checkpatch has to say:
> 
> $ perl scripts/checkpatch.pl -f
> ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> ERROR: trailing whitespace
> #21: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:21:
> + $
> 
> ERROR: trailing whitespace
> #23: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:23:
> + $
> 
> ERROR: trailing whitespace
> #30: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:30:
> + $
> 
> ERROR: trailing whitespace
> #37: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:37:
> + $
> 
> ERROR: trailing whitespace
> #44: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:44:
> + $
> 
> ERROR: trailing whitespace
> #51: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:51:
> +-- $
> 
> total: 6 errors, 0 warnings, 53 lines checked
> 
> NOTE: For some of the reported defects, checkpatch may be able to
>       mechanically convert to the typical style using --fix or --fix-inplace.
> 
> NOTE: Whitespace errors detected.
>       You may wish to use scripts/cleanpatch or scripts/cleanfile
> 
> ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> has style problems, please review.
> 
> NOTE: If any of the errors are false positives, please report
>       them to the maintainer, see CHECKPATCH in MAINTAINERS.
> 
> Does this happen only to patches I make? Am I making a silly mistake
> while making a patch?

I don't get that error at all, here's all I get with that patch:

$ ./scripts/checkpatch.pl x.patch
WARNING: Missing Signed-off-by: line by nominal patch author ''

total: 0 errors, 1 warnings, 0 checks, 30 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

x.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.



That warning is because I just saved the body of your email as a patch,
watch out when you try to check signed emails like you are doing here.

> I use 'git format-patch -1' to generate the patch file.
> If I am going wrong somewhere, please let me know.

Seems to work for me :)

thanks,

greg k-h

Re: [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[Greg Kroah-Hartman]

On Wed, Jul 15, 2020 at 04:47:48AM -0400, B K Karthik wrote:
> On Wed, Jul 15, 2020 at 4:41 AM B K Karthik <bkkarthik@pesu.pes.edu> wrote:
> >
> > On Wed, Jul 15, 2020 at 4:31 AM Greg Kroah-Hartman
> > <gregkh@linuxfoundation.org> wrote:
> > >
> > > On Wed, Jul 15, 2020 at 01:56:45PM +0530, B K Karthik wrote:
> > > > On Wed, Jul 15, 2020, 12:38 PM Greg Kroah-Hartman <
> > > > gregkh@linuxfoundation.org> wrote:
> > > >
> > > > > On Wed, Jul 15, 2020 at 12:48:13AM -0400, B K Karthik wrote:
> > > > > > fixed a sparse warning by changing the type in
> > > > > > assignment from void [noderef] __user * to unsigned int *
> > > > > > (different address space)
> > > > > >
> > > > > > Signed-off-by: B K Karthik <karthik.bk2000@live.com>
> > > > > > ---
> > > > > >  drivers/staging/comedi/comedi_fops.c | 2 +-
> > > > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > > >
> > > > > > diff --git a/drivers/staging/comedi/comedi_fops.c
> > > > > b/drivers/staging/comedi/comedi_fops.c
> > > > > > index 3f70e5dfac39..4cc012e231b7 100644
> > > > > > --- a/drivers/staging/comedi/comedi_fops.c
> > > > > > +++ b/drivers/staging/comedi/comedi_fops.c
> > > > > > @@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
> > > > > >       cmd->scan_end_arg = v32.scan_end_arg;
> > > > > >       cmd->stop_src = v32.stop_src;
> > > > > >       cmd->stop_arg = v32.stop_arg;
> > > > > > -     cmd->chanlist = compat_ptr(v32.chanlist);
> > > > > > +     cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
> > > > > >       cmd->chanlist_len = v32.chanlist_len;
> > > > > >       cmd->data = compat_ptr(v32.data);
> > > > > >       cmd->data_len = v32.data_len;
> > > > >
> > > > > Always run your patches through checkpatch before sending them, so you
> > > > > do not have a grumpy maintainer telling you that you have to run
> > > > > checkpatch on your patch before sending them.
> > > > >
> > > >
> > > > I will. Sorry for that.
> > > >
> > > > But the error that's being shown in this patch is something that comes up
> > > > on its own.
> > >
> > > No it is not.
> > >
> > > > git format-patch leaves trailing whitespace in blank lines.
> > >
> > > It does?  Where is any trailing whitespace here?  That's not the issue.
> >
> > To give you an example,
> > https://lore.kernel.org/lkml/20200714132350.naekk4zqivpuaedi@pesu-pes-edu/
> > was a patch i submitted recently.
> > This is what checkpatch has to say:
> >
> > $ perl scripts/checkpatch.pl -f
> > ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> > ERROR: trailing whitespace
> > #21: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:21:
> > + $
> >
> > ERROR: trailing whitespace
> > #23: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:23:
> > + $
> >
> > ERROR: trailing whitespace
> > #30: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:30:
> > + $
> >
> > ERROR: trailing whitespace
> > #37: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:37:
> > + $
> >
> > ERROR: trailing whitespace
> > #44: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:44:
> > + $
> >
> > ERROR: trailing whitespace
> > #51: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:51:
> > +-- $
> >
> > total: 6 errors, 0 warnings, 53 lines checked
> >
> > NOTE: For some of the reported defects, checkpatch may be able to
> >       mechanically convert to the typical style using --fix or --fix-inplace.
> >
> > NOTE: Whitespace errors detected.
> >       You may wish to use scripts/cleanpatch or scripts/cleanfile
> >
> > ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> > has style problems, please review.
> >
> > NOTE: If any of the errors are false positives, please report
> >       them to the maintainer, see CHECKPATCH in MAINTAINERS.
> >
> > Does this happen only to patches I make? Am I making a silly mistake
> > while making a patch?
> > I use 'git format-patch -1' to generate the patch file.
> > If I am going wrong somewhere, please let me know.
> 
> Also, The patch I sent (this thread):
> $ perl scripts/checkpatch.pl -f
> ./0001-staging-comedi-comedi_fops.c-changed-void-__user-to-.patch
> ERROR: trailing whitespace
> #29: FILE: ./0001-staging-comedi-comedi_fops.c-changed-void-__user-to-.patch:29:
> +-- $
> 
> total: 1 errors, 0 warnings, 31 lines checked
> 
> NOTE: For some of the reported defects, checkpatch may be able to
>       mechanically convert to the typical style using --fix or --fix-inplace.
> 
> NOTE: Whitespace errors detected.
>       You may wish to use scripts/cleanpatch or scripts/cleanfile
> 
> ./0001-staging-comedi-comedi_fops.c-changed-void-__user-to-.patch has
> style problems, please review.
> 
> NOTE: If any of the errors are false positives, please report
>       them to the maintainer, see CHECKPATCH in MAINTAINERS.
> 
> Am I using 'git format-patch' or 'checkpatch.pl' the wrong way?

Are you checking the right thing here?  Here's what I got:

$ ./scripts/checkpatch.pl --terse x.patch
x.patch:19: CHECK: No space is necessary after a cast
x.patch:25: WARNING: Missing Signed-off-by: line by nominal patch author ''
total: 0 errors, 1 warnings, 1 checks, 8 lines checked


I use --terse to make it more obvious what the issue is.

Heck, check it yourself:

$ b4 am https://lore.kernel.org/r/20200715044813.fww3regsgsbgyp7b@pesu-pes-edu
Looking up https://lore.kernel.org/r/20200715044813.fww3regsgsbgyp7b%40pesu-pes-edu
Grabbing thread from lore.kernel.org/driverdev-devel
Analyzing 7 messages in the thread
---
Writing ./20200715_bkkarthik_staging_comedi_comedi_fops_c_changed_type_in_assignment_to_unsigned_int.mbx
  [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *
---
Total patches: 1
---
 Link: https://lore.kernel.org/r/20200715044813.fww3regsgsbgyp7b@pesu-pes-edu
 Base: not found (applies clean to current tree)
       git am ./20200715_bkkarthik_staging_comedi_comedi_fops_c_changed_type_in_assignment_to_unsigned_int.mbx

$ ./scripts/checkpatch.pl --terse 20200715_bkkarthik_staging_comedi_comedi_fops_c_changed_type_in_assignment_to_unsigned_int.mbx
20200715_bkkarthik_staging_comedi_comedi_fops_c_changed_type_in_assignment_to_unsigned_int.mbx:32: CHECK: No space is necessary after a cast
20200715_bkkarthik_staging_comedi_comedi_fops_c_changed_type_in_assignment_to_unsigned_int.mbx:38: WARNING: Missing Signed-off-by: line by nominal patch author 'B K Karthik <bkkarthik@pesu.pes.edu>'
total: 0 errors, 1 warnings, 1 checks, 8 lines checked


I used the b4 tool to download your email in mbox form from
lore.kernel.org and then ran checkpatch on it.


And the signed-off-by error is real, you need to also fix that.

Try the above yourself to verify this.

thanks,

greg k-h

Re: [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[B K Karthik]

On Wed, Jul 15, 2020 at 5:14 AM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> On Wed, Jul 15, 2020 at 04:41:52AM -0400, B K Karthik wrote:
> > On Wed, Jul 15, 2020 at 4:31 AM Greg Kroah-Hartman
> > <gregkh@linuxfoundation.org> wrote:
> > >
> > > On Wed, Jul 15, 2020 at 01:56:45PM +0530, B K Karthik wrote:
> > > > On Wed, Jul 15, 2020, 12:38 PM Greg Kroah-Hartman <
> > > > gregkh@linuxfoundation.org> wrote:
> > > >
> > > > > On Wed, Jul 15, 2020 at 12:48:13AM -0400, B K Karthik wrote:
> > > > > > fixed a sparse warning by changing the type in
> > > > > > assignment from void [noderef] __user * to unsigned int *
> > > > > > (different address space)
> > > > > >
> > > > > > Signed-off-by: B K Karthik <karthik.bk2000@live.com>
> > > > > > ---
> > > > > >  drivers/staging/comedi/comedi_fops.c | 2 +-
> > > > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > > >
> > > > > > diff --git a/drivers/staging/comedi/comedi_fops.c
> > > > > b/drivers/staging/comedi/comedi_fops.c
> > > > > > index 3f70e5dfac39..4cc012e231b7 100644
> > > > > > --- a/drivers/staging/comedi/comedi_fops.c
> > > > > > +++ b/drivers/staging/comedi/comedi_fops.c
> > > > > > @@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
> > > > > >       cmd->scan_end_arg = v32.scan_end_arg;
> > > > > >       cmd->stop_src = v32.stop_src;
> > > > > >       cmd->stop_arg = v32.stop_arg;
> > > > > > -     cmd->chanlist = compat_ptr(v32.chanlist);
> > > > > > +     cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
> > > > > >       cmd->chanlist_len = v32.chanlist_len;
> > > > > >       cmd->data = compat_ptr(v32.data);
> > > > > >       cmd->data_len = v32.data_len;
> > > > >
> > > > > Always run your patches through checkpatch before sending them, so you
> > > > > do not have a grumpy maintainer telling you that you have to run
> > > > > checkpatch on your patch before sending them.
> > > > >
> > > >
> > > > I will. Sorry for that.
> > > >
> > > > But the error that's being shown in this patch is something that comes up
> > > > on its own.
> > >
> > > No it is not.
> > >
> > > > git format-patch leaves trailing whitespace in blank lines.
> > >
> > > It does?  Where is any trailing whitespace here?  That's not the issue.
> >
> > To give you an example,
> > https://lore.kernel.org/lkml/20200714132350.naekk4zqivpuaedi@pesu-pes-edu/
> > was a patch i submitted recently.
> > This is what checkpatch has to say:
> >
> > $ perl scripts/checkpatch.pl -f
> > ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> > ERROR: trailing whitespace
> > #21: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:21:
> > + $
> >
> > ERROR: trailing whitespace
> > #23: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:23:
> > + $
> >
> > ERROR: trailing whitespace
> > #30: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:30:
> > + $
> >
> > ERROR: trailing whitespace
> > #37: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:37:
> > + $
> >
> > ERROR: trailing whitespace
> > #44: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:44:
> > + $
> >
> > ERROR: trailing whitespace
> > #51: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:51:
> > +-- $
> >
> > total: 6 errors, 0 warnings, 53 lines checked
> >
> > NOTE: For some of the reported defects, checkpatch may be able to
> >       mechanically convert to the typical style using --fix or --fix-inplace.
> >
> > NOTE: Whitespace errors detected.
> >       You may wish to use scripts/cleanpatch or scripts/cleanfile
> >
> > ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> > has style problems, please review.
> >
> > NOTE: If any of the errors are false positives, please report
> >       them to the maintainer, see CHECKPATCH in MAINTAINERS.
> >
> > Does this happen only to patches I make? Am I making a silly mistake
> > while making a patch?
>
> I don't get that error at all, here's all I get with that patch:
this particular patch or
>
> $ ./scripts/checkpatch.pl x.patch
> WARNING: Missing Signed-off-by: line by nominal patch author ''
>
> total: 0 errors, 1 warnings, 0 checks, 30 lines checked

sorry, you've probably done this a million times more than me, but can
you try "perl scripts/checkpatch.pl -f x.patch" ?
checkpatch seems to behave differently this way.

thanks,

karthik

Re: [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[B K Karthik]

On Wed, Jul 15, 2020 at 5:19 AM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> On Wed, Jul 15, 2020 at 04:47:48AM -0400, B K Karthik wrote:
> > On Wed, Jul 15, 2020 at 4:41 AM B K Karthik <bkkarthik@pesu.pes.edu> wrote:
> > >
> > > On Wed, Jul 15, 2020 at 4:31 AM Greg Kroah-Hartman
> > > <gregkh@linuxfoundation.org> wrote:
> > > >
> > > > On Wed, Jul 15, 2020 at 01:56:45PM +0530, B K Karthik wrote:
> > > > > On Wed, Jul 15, 2020, 12:38 PM Greg Kroah-Hartman <
> > > > > gregkh@linuxfoundation.org> wrote:
> > > > >
> > > > > > On Wed, Jul 15, 2020 at 12:48:13AM -0400, B K Karthik wrote:
> > > > > > > fixed a sparse warning by changing the type in
> > > > > > > assignment from void [noderef] __user * to unsigned int *
> > > > > > > (different address space)
> > > > > > >
> > > > > > > Signed-off-by: B K Karthik <karthik.bk2000@live.com>
> > > > > > > ---
> > > > > > >  drivers/staging/comedi/comedi_fops.c | 2 +-
> > > > > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > > > >
> > > > > > > diff --git a/drivers/staging/comedi/comedi_fops.c
> > > > > > b/drivers/staging/comedi/comedi_fops.c
> > > > > > > index 3f70e5dfac39..4cc012e231b7 100644
> > > > > > > --- a/drivers/staging/comedi/comedi_fops.c
> > > > > > > +++ b/drivers/staging/comedi/comedi_fops.c
> > > > > > > @@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
> > > > > > >       cmd->scan_end_arg = v32.scan_end_arg;
> > > > > > >       cmd->stop_src = v32.stop_src;
> > > > > > >       cmd->stop_arg = v32.stop_arg;
> > > > > > > -     cmd->chanlist = compat_ptr(v32.chanlist);
> > > > > > > +     cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
> > > > > > >       cmd->chanlist_len = v32.chanlist_len;
> > > > > > >       cmd->data = compat_ptr(v32.data);
> > > > > > >       cmd->data_len = v32.data_len;
> > > > > >
> > > > > > Always run your patches through checkpatch before sending them, so you
> > > > > > do not have a grumpy maintainer telling you that you have to run
> > > > > > checkpatch on your patch before sending them.
> > > > > >
> > > > >
> > > > > I will. Sorry for that.
> > > > >
> > > > > But the error that's being shown in this patch is something that comes up
> > > > > on its own.
> > > >
> > > > No it is not.
> > > >
> > > > > git format-patch leaves trailing whitespace in blank lines.
> > > >
> > > > It does?  Where is any trailing whitespace here?  That's not the issue.
> > >
> > > To give you an example,
> > > https://lore.kernel.org/lkml/20200714132350.naekk4zqivpuaedi@pesu-pes-edu/
> > > was a patch i submitted recently.
> > > This is what checkpatch has to say:
> > >
> > > $ perl scripts/checkpatch.pl -f
> > > ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> > > ERROR: trailing whitespace
> > > #21: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:21:
> > > + $
> > >
> > > ERROR: trailing whitespace
> > > #23: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:23:
> > > + $
> > >
> > > ERROR: trailing whitespace
> > > #30: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:30:
> > > + $
> > >
> > > ERROR: trailing whitespace
> > > #37: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:37:
> > > + $
> > >
> > > ERROR: trailing whitespace
> > > #44: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:44:
> > > + $
> > >
> > > ERROR: trailing whitespace
> > > #51: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:51:
> > > +-- $
> > >
> > > total: 6 errors, 0 warnings, 53 lines checked
> > >
> > > NOTE: For some of the reported defects, checkpatch may be able to
> > >       mechanically convert to the typical style using --fix or --fix-inplace.
> > >
> > > NOTE: Whitespace errors detected.
> > >       You may wish to use scripts/cleanpatch or scripts/cleanfile
> > >
> > > ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> > > has style problems, please review.
> > >
> > > NOTE: If any of the errors are false positives, please report
> > >       them to the maintainer, see CHECKPATCH in MAINTAINERS.
> > >
> > > Does this happen only to patches I make? Am I making a silly mistake
> > > while making a patch?
> > > I use 'git format-patch -1' to generate the patch file.
> > > If I am going wrong somewhere, please let me know.
> >
> > Also, The patch I sent (this thread):
> > $ perl scripts/checkpatch.pl -f
> > ./0001-staging-comedi-comedi_fops.c-changed-void-__user-to-.patch
> > ERROR: trailing whitespace
> > #29: FILE: ./0001-staging-comedi-comedi_fops.c-changed-void-__user-to-.patch:29:
> > +-- $
> >
> > total: 1 errors, 0 warnings, 31 lines checked
> >
> > NOTE: For some of the reported defects, checkpatch may be able to
> >       mechanically convert to the typical style using --fix or --fix-inplace.
> >
> > NOTE: Whitespace errors detected.
> >       You may wish to use scripts/cleanpatch or scripts/cleanfile
> >
> > ./0001-staging-comedi-comedi_fops.c-changed-void-__user-to-.patch has
> > style problems, please review.
> >
> > NOTE: If any of the errors are false positives, please report
> >       them to the maintainer, see CHECKPATCH in MAINTAINERS.
> >
> > Am I using 'git format-patch' or 'checkpatch.pl' the wrong way?
>
> Are you checking the right thing here?  Here's what I got:
>
> $ ./scripts/checkpatch.pl --terse x.patch
> x.patch:19: CHECK: No space is necessary after a cast
> x.patch:25: WARNING: Missing Signed-off-by: line by nominal patch author ''
> total: 0 errors, 1 warnings, 1 checks, 8 lines checked
>
>
> I use --terse to make it more obvious what the issue is.
>
> Heck, check it yourself:
>
> $ b4 am https://lore.kernel.org/r/20200715044813.fww3regsgsbgyp7b@pesu-pes-edu
> Looking up https://lore.kernel.org/r/20200715044813.fww3regsgsbgyp7b%40pesu-pes-edu
> Grabbing thread from lore.kernel.org/driverdev-devel
> Analyzing 7 messages in the thread
> ---
> Writing ./20200715_bkkarthik_staging_comedi_comedi_fops_c_changed_type_in_assignment_to_unsigned_int.mbx
>   [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *
> ---
> Total patches: 1
> ---
>  Link: https://lore.kernel.org/r/20200715044813.fww3regsgsbgyp7b@pesu-pes-edu
>  Base: not found (applies clean to current tree)
>        git am ./20200715_bkkarthik_staging_comedi_comedi_fops_c_changed_type_in_assignment_to_unsigned_int.mbx
>
> $ ./scripts/checkpatch.pl --terse 20200715_bkkarthik_staging_comedi_comedi_fops_c_changed_type_in_assignment_to_unsigned_int.mbx
> 20200715_bkkarthik_staging_comedi_comedi_fops_c_changed_type_in_assignment_to_unsigned_int.mbx:32: CHECK: No space is necessary after a cast
> 20200715_bkkarthik_staging_comedi_comedi_fops_c_changed_type_in_assignment_to_unsigned_int.mbx:38: WARNING: Missing Signed-off-by: line by nominal patch author 'B K Karthik <bkkarthik@pesu.pes.edu>'
> total: 0 errors, 1 warnings, 1 checks, 8 lines checked
>
>
> I used the b4 tool to download your email in mbox form from
> lore.kernel.org and then ran checkpatch on it.
>
>
> And the signed-off-by error is real, you need to also fix that.

I will check that. I am sorry for wasting your time.
But you have accepted a couple of patches from me before that were
created the same way.

>
> Try the above yourself to verify this.

I will.

thanks,

karthik

Re: [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[Greg Kroah-Hartman]

On Wed, Jul 15, 2020 at 05:21:01AM -0400, B K Karthik wrote:
> On Wed, Jul 15, 2020 at 5:14 AM Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >
> > On Wed, Jul 15, 2020 at 04:41:52AM -0400, B K Karthik wrote:
> > > On Wed, Jul 15, 2020 at 4:31 AM Greg Kroah-Hartman
> > > <gregkh@linuxfoundation.org> wrote:
> > > >
> > > > On Wed, Jul 15, 2020 at 01:56:45PM +0530, B K Karthik wrote:
> > > > > On Wed, Jul 15, 2020, 12:38 PM Greg Kroah-Hartman <
> > > > > gregkh@linuxfoundation.org> wrote:
> > > > >
> > > > > > On Wed, Jul 15, 2020 at 12:48:13AM -0400, B K Karthik wrote:
> > > > > > > fixed a sparse warning by changing the type in
> > > > > > > assignment from void [noderef] __user * to unsigned int *
> > > > > > > (different address space)
> > > > > > >
> > > > > > > Signed-off-by: B K Karthik <karthik.bk2000@live.com>
> > > > > > > ---
> > > > > > >  drivers/staging/comedi/comedi_fops.c | 2 +-
> > > > > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > > > >
> > > > > > > diff --git a/drivers/staging/comedi/comedi_fops.c
> > > > > > b/drivers/staging/comedi/comedi_fops.c
> > > > > > > index 3f70e5dfac39..4cc012e231b7 100644
> > > > > > > --- a/drivers/staging/comedi/comedi_fops.c
> > > > > > > +++ b/drivers/staging/comedi/comedi_fops.c
> > > > > > > @@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
> > > > > > >       cmd->scan_end_arg = v32.scan_end_arg;
> > > > > > >       cmd->stop_src = v32.stop_src;
> > > > > > >       cmd->stop_arg = v32.stop_arg;
> > > > > > > -     cmd->chanlist = compat_ptr(v32.chanlist);
> > > > > > > +     cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
> > > > > > >       cmd->chanlist_len = v32.chanlist_len;
> > > > > > >       cmd->data = compat_ptr(v32.data);
> > > > > > >       cmd->data_len = v32.data_len;
> > > > > >
> > > > > > Always run your patches through checkpatch before sending them, so you
> > > > > > do not have a grumpy maintainer telling you that you have to run
> > > > > > checkpatch on your patch before sending them.
> > > > > >
> > > > >
> > > > > I will. Sorry for that.
> > > > >
> > > > > But the error that's being shown in this patch is something that comes up
> > > > > on its own.
> > > >
> > > > No it is not.
> > > >
> > > > > git format-patch leaves trailing whitespace in blank lines.
> > > >
> > > > It does?  Where is any trailing whitespace here?  That's not the issue.
> > >
> > > To give you an example,
> > > https://lore.kernel.org/lkml/20200714132350.naekk4zqivpuaedi@pesu-pes-edu/
> > > was a patch i submitted recently.
> > > This is what checkpatch has to say:
> > >
> > > $ perl scripts/checkpatch.pl -f
> > > ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> > > ERROR: trailing whitespace
> > > #21: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:21:
> > > + $
> > >
> > > ERROR: trailing whitespace
> > > #23: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:23:
> > > + $
> > >
> > > ERROR: trailing whitespace
> > > #30: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:30:
> > > + $
> > >
> > > ERROR: trailing whitespace
> > > #37: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:37:
> > > + $
> > >
> > > ERROR: trailing whitespace
> > > #44: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:44:
> > > + $
> > >
> > > ERROR: trailing whitespace
> > > #51: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:51:
> > > +-- $
> > >
> > > total: 6 errors, 0 warnings, 53 lines checked
> > >
> > > NOTE: For some of the reported defects, checkpatch may be able to
> > >       mechanically convert to the typical style using --fix or --fix-inplace.
> > >
> > > NOTE: Whitespace errors detected.
> > >       You may wish to use scripts/cleanpatch or scripts/cleanfile
> > >
> > > ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> > > has style problems, please review.
> > >
> > > NOTE: If any of the errors are false positives, please report
> > >       them to the maintainer, see CHECKPATCH in MAINTAINERS.
> > >
> > > Does this happen only to patches I make? Am I making a silly mistake
> > > while making a patch?
> >
> > I don't get that error at all, here's all I get with that patch:
> this particular patch or
> >
> > $ ./scripts/checkpatch.pl x.patch
> > WARNING: Missing Signed-off-by: line by nominal patch author ''
> >
> > total: 0 errors, 1 warnings, 0 checks, 30 lines checked
> 
> sorry, you've probably done this a million times more than me, but can
> you try "perl scripts/checkpatch.pl -f x.patch" ?
> checkpatch seems to behave differently this way.

Of course it would, "-f" means treat the next argument as a file, not as
a patch.  This is a patch, not a full file.

So you are running this incorrectly and then ignoring the results?  :(

thanks,

greg k-h

Re: [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[B K Karthik]

On Wed, Jul 15, 2020 at 5:29 AM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> On Wed, Jul 15, 2020 at 05:21:01AM -0400, B K Karthik wrote:
> > On Wed, Jul 15, 2020 at 5:14 AM Greg Kroah-Hartman
> > <gregkh@linuxfoundation.org> wrote:
> > >
> > > On Wed, Jul 15, 2020 at 04:41:52AM -0400, B K Karthik wrote:
> > > > On Wed, Jul 15, 2020 at 4:31 AM Greg Kroah-Hartman
> > > > <gregkh@linuxfoundation.org> wrote:
> > > > >
> > > > > On Wed, Jul 15, 2020 at 01:56:45PM +0530, B K Karthik wrote:
> > > > > > On Wed, Jul 15, 2020, 12:38 PM Greg Kroah-Hartman <
> > > > > > gregkh@linuxfoundation.org> wrote:
> > > > > >
> > > > > > > On Wed, Jul 15, 2020 at 12:48:13AM -0400, B K Karthik wrote:
> > > > > > > > fixed a sparse warning by changing the type in
> > > > > > > > assignment from void [noderef] __user * to unsigned int *
> > > > > > > > (different address space)
> > > > > > > >
> > > > > > > > Signed-off-by: B K Karthik <karthik.bk2000@live.com>
> > > > > > > > ---
> > > > > > > >  drivers/staging/comedi/comedi_fops.c | 2 +-
> > > > > > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > > > > >
> > > > > > > > diff --git a/drivers/staging/comedi/comedi_fops.c
> > > > > > > b/drivers/staging/comedi/comedi_fops.c
> > > > > > > > index 3f70e5dfac39..4cc012e231b7 100644
> > > > > > > > --- a/drivers/staging/comedi/comedi_fops.c
> > > > > > > > +++ b/drivers/staging/comedi/comedi_fops.c
> > > > > > > > @@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
> > > > > > > >       cmd->scan_end_arg = v32.scan_end_arg;
> > > > > > > >       cmd->stop_src = v32.stop_src;
> > > > > > > >       cmd->stop_arg = v32.stop_arg;
> > > > > > > > -     cmd->chanlist = compat_ptr(v32.chanlist);
> > > > > > > > +     cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
> > > > > > > >       cmd->chanlist_len = v32.chanlist_len;
> > > > > > > >       cmd->data = compat_ptr(v32.data);
> > > > > > > >       cmd->data_len = v32.data_len;
> > > > > > >
> > > > > > > Always run your patches through checkpatch before sending them, so you
> > > > > > > do not have a grumpy maintainer telling you that you have to run
> > > > > > > checkpatch on your patch before sending them.
> > > > > > >
> > > > > >
> > > > > > I will. Sorry for that.
> > > > > >
> > > > > > But the error that's being shown in this patch is something that comes up
> > > > > > on its own.
> > > > >
> > > > > No it is not.
> > > > >
> > > > > > git format-patch leaves trailing whitespace in blank lines.
> > > > >
> > > > > It does?  Where is any trailing whitespace here?  That's not the issue.
> > > >
> > > > To give you an example,
> > > > https://lore.kernel.org/lkml/20200714132350.naekk4zqivpuaedi@pesu-pes-edu/
> > > > was a patch i submitted recently.
> > > > This is what checkpatch has to say:
> > > >
> > > > $ perl scripts/checkpatch.pl -f
> > > > ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> > > > ERROR: trailing whitespace
> > > > #21: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:21:
> > > > + $
> > > >
> > > > ERROR: trailing whitespace
> > > > #23: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:23:
> > > > + $
> > > >
> > > > ERROR: trailing whitespace
> > > > #30: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:30:
> > > > + $
> > > >
> > > > ERROR: trailing whitespace
> > > > #37: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:37:
> > > > + $
> > > >
> > > > ERROR: trailing whitespace
> > > > #44: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:44:
> > > > + $
> > > >
> > > > ERROR: trailing whitespace
> > > > #51: FILE: ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch:51:
> > > > +-- $
> > > >
> > > > total: 6 errors, 0 warnings, 53 lines checked
> > > >
> > > > NOTE: For some of the reported defects, checkpatch may be able to
> > > >       mechanically convert to the typical style using --fix or --fix-inplace.
> > > >
> > > > NOTE: Whitespace errors detected.
> > > >       You may wish to use scripts/cleanpatch or scripts/cleanfile
> > > >
> > > > ../cbridge/1407d/1/0001-drivers-staging-media-atomisp-pci-css_2401_system-ho.patch
> > > > has style problems, please review.
> > > >
> > > > NOTE: If any of the errors are false positives, please report
> > > >       them to the maintainer, see CHECKPATCH in MAINTAINERS.
> > > >
> > > > Does this happen only to patches I make? Am I making a silly mistake
> > > > while making a patch?
> > >
> > > I don't get that error at all, here's all I get with that patch:
> > this particular patch or
> > >
> > > $ ./scripts/checkpatch.pl x.patch
> > > WARNING: Missing Signed-off-by: line by nominal patch author ''
> > >
> > > total: 0 errors, 1 warnings, 0 checks, 30 lines checked
> >
> > sorry, you've probably done this a million times more than me, but can
> > you try "perl scripts/checkpatch.pl -f x.patch" ?
> > checkpatch seems to behave differently this way.
>
> Of course it would, "-f" means treat the next argument as a file, not as
> a patch.  This is a patch, not a full file.
sorry. I will make sure there are no errors the next time.
>
> So you are running this incorrectly and then ignoring the results?  :(

sorry.
thank you for the clarification.

thanks,

karthik

Re: [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[Ian Abbott]

On 15/07/2020 05:48, B K Karthik wrote:
> fixed a sparse warning by changing the type in
> assignment from void [noderef] __user * to unsigned int *
> (different address space)
> 
> Signed-off-by: B K Karthik <karthik.bk2000@live.com>
> ---
>   drivers/staging/comedi/comedi_fops.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
> index 3f70e5dfac39..4cc012e231b7 100644
> --- a/drivers/staging/comedi/comedi_fops.c
> +++ b/drivers/staging/comedi/comedi_fops.c
> @@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
>   	cmd->scan_end_arg = v32.scan_end_arg;
>   	cmd->stop_src = v32.stop_src;
>   	cmd->stop_arg = v32.stop_arg;
> -	cmd->chanlist = compat_ptr(v32.chanlist);
> +	cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);

That should be:

	cmd->chanlist = (unsigned int __force *)compat_ptr(v32.chanlist);

>   	cmd->chanlist_len = v32.chanlist_len;
>   	cmd->data = compat_ptr(v32.data);
>   	cmd->data_len = v32.data_len;
> 

A reverse cast is required in put_compat_cmd():

	v32.chanlist = ptr_to_compat((unsigned int __user *)cmd->chanlist);

Those changes will get rid of the sparse warnings.

-- 
-=( Ian Abbott <abbotti@mev.co.uk> || Web: www.mev.co.uk )=-
-=( MEV Ltd. is a company registered in England & Wales. )=-
-=( Registered number: 02862268.  Registered address:    )=-
-=( 15 West Park Road, Bramhall, STOCKPORT, SK7 3JZ, UK. )=-

Re: [PATCH] staging: comedi: comedi_fops.c: changed type in assignment to unsigned int *

[B K Karthik]

On Wed, Jul 15, 2020 at 7:19 AM Ian Abbott <abbotti@mev.co.uk> wrote:
>
> On 15/07/2020 05:48, B K Karthik wrote:
> > fixed a sparse warning by changing the type in
> > assignment from void [noderef] __user * to unsigned int *
> > (different address space)
> >
> > Signed-off-by: B K Karthik <karthik.bk2000@live.com>
> > ---
> >   drivers/staging/comedi/comedi_fops.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
> > index 3f70e5dfac39..4cc012e231b7 100644
> > --- a/drivers/staging/comedi/comedi_fops.c
> > +++ b/drivers/staging/comedi/comedi_fops.c
> > @@ -2956,7 +2956,7 @@ static int get_compat_cmd(struct comedi_cmd *cmd,
> >       cmd->scan_end_arg = v32.scan_end_arg;
> >       cmd->stop_src = v32.stop_src;
> >       cmd->stop_arg = v32.stop_arg;
> > -     cmd->chanlist = compat_ptr(v32.chanlist);
> > +     cmd->chanlist = (unsigned int *) compat_ptr(v32.chanlist);
>
> That should be:
>
>         cmd->chanlist = (unsigned int __force *)compat_ptr(v32.chanlist);
>
> >       cmd->chanlist_len = v32.chanlist_len;
> >       cmd->data = compat_ptr(v32.data);
> >       cmd->data_len = v32.data_len;
> >
>
> A reverse cast is required in put_compat_cmd():
>
>         v32.chanlist = ptr_to_compat((unsigned int __user *)cmd->chanlist);
>
> Those changes will get rid of the sparse warnings.

Thank you for the clarifications Ian. I will make the changes and submit a patch

thanks,

karthik