* [PATCH] scsi: xen-scsifront: add error handling for xenbus_printf
@ 2018-06-12 3:42 Zhouyang Jia
2018-06-13 10:09 ` Finn Thain
` (4 more replies)
0 siblings, 5 replies; 14+ messages in thread
From: Zhouyang Jia @ 2018-06-12 3:42 UTC (permalink / raw)
Cc: Zhouyang Jia, Juergen Gross, Boris Ostrovsky,
James E.J. Bottomley, Martin K. Petersen, xen-devel, linux-scsi,
linux-kernel
When xenbus_printf fails, the lack of error-handling code may
cause unexpected results.
This patch adds error-handling code after calling xenbus_printf.
Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
---
drivers/scsi/xen-scsifront.c | 31 ++++++++++++++++++++++++-------
1 file changed, 24 insertions(+), 7 deletions(-)
diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
index 36f59a1..3d858ac 100644
--- a/drivers/scsi/xen-scsifront.c
+++ b/drivers/scsi/xen-scsifront.c
@@ -654,10 +654,17 @@ static int scsifront_dev_reset_handler(struct scsi_cmnd *sc)
static int scsifront_sdev_configure(struct scsi_device *sdev)
{
struct vscsifrnt_info *info = shost_priv(sdev->host);
+ struct xenbus_device *dev = info->dev;
+ int err;
- if (info && current == info->curr)
- xenbus_printf(XBT_NIL, info->dev->nodename,
+ if (info && current == info->curr) {
+ err = xenbus_printf(XBT_NIL, info->dev->nodename,
info->dev_state_path, "%d", XenbusStateConnected);
+ if (err) {
+ dev_err(&dev->dev, "writing dev_state_path\n");
+ return err;
+ }
+ }
return 0;
}
@@ -665,10 +672,15 @@ static int scsifront_sdev_configure(struct scsi_device *sdev)
static void scsifront_sdev_destroy(struct scsi_device *sdev)
{
struct vscsifrnt_info *info = shost_priv(sdev->host);
+ struct xenbus_device *dev = info->dev;
+ int err;
- if (info && current == info->curr)
- xenbus_printf(XBT_NIL, info->dev->nodename,
+ if (info && current == info->curr) {
+ err = xenbus_printf(XBT_NIL, info->dev->nodename,
info->dev_state_path, "%d", XenbusStateClosed);
+ if (err)
+ dev_err(&dev->dev, "writing dev_state_path\n");
+ }
}
static struct scsi_host_template scsifront_sht = {
@@ -1003,9 +1015,11 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
if (scsi_add_device(info->host, chn, tgt, lun)) {
dev_err(&dev->dev, "scsi_add_device\n");
- xenbus_printf(XBT_NIL, dev->nodename,
+ err = xenbus_printf(XBT_NIL, dev->nodename,
info->dev_state_path,
"%d", XenbusStateClosed);
+ if (err)
+ dev_err(&dev->dev, "writing dev_state_path\n");
}
break;
case VSCSIFRONT_OP_DEL_LUN:
@@ -1019,10 +1033,13 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
}
break;
case VSCSIFRONT_OP_READD_LUN:
- if (device_state == XenbusStateConnected)
- xenbus_printf(XBT_NIL, dev->nodename,
+ if (device_state == XenbusStateConnected) {
+ err = xenbus_printf(XBT_NIL, dev->nodename,
info->dev_state_path,
"%d", XenbusStateConnected);
+ if (err)
+ dev_err(&dev->dev, "writing dev_state_path\n");
+ }
break;
default:
break;
--
2.7.4
^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH] scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-12 3:42 [PATCH] scsi: xen-scsifront: add error handling for xenbus_printf Zhouyang Jia
@ 2018-06-13 10:09 ` Finn Thain
2018-06-14 16:08 ` [PATCH v2] " Zhouyang Jia
` (3 subsequent siblings)
4 siblings, 0 replies; 14+ messages in thread
From: Finn Thain @ 2018-06-13 10:09 UTC (permalink / raw)
To: Zhouyang Jia
Cc: Juergen Gross, Boris Ostrovsky, James E.J. Bottomley,
Martin K. Petersen, xen-devel, linux-scsi, linux-kernel
On Tue, 12 Jun 2018, Zhouyang Jia wrote:
> When xenbus_printf fails, the lack of error-handling code may
> cause unexpected results.
>
> This patch adds error-handling code after calling xenbus_printf.
>
> Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
> ---
> drivers/scsi/xen-scsifront.c | 31 ++++++++++++++++++++++++-------
> 1 file changed, 24 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
> index 36f59a1..3d858ac 100644
> --- a/drivers/scsi/xen-scsifront.c
> +++ b/drivers/scsi/xen-scsifront.c
> @@ -654,10 +654,17 @@ static int scsifront_dev_reset_handler(struct scsi_cmnd *sc)
> static int scsifront_sdev_configure(struct scsi_device *sdev)
> {
> struct vscsifrnt_info *info = shost_priv(sdev->host);
> + struct xenbus_device *dev = info->dev;
> + int err;
>
> - if (info && current == info->curr)
> - xenbus_printf(XBT_NIL, info->dev->nodename,
> + if (info && current == info->curr) {
> + err = xenbus_printf(XBT_NIL, info->dev->nodename,
> info->dev_state_path, "%d", XenbusStateConnected);
The existing code checks whether 'info' is NULL before dereferencing it.
But your patch checks for NULL after dereferencing.
> + if (err) {
> + dev_err(&dev->dev, "writing dev_state_path\n");
> + return err;
> + }
> + }
>
> return 0;
> }
> @@ -665,10 +672,15 @@ static int scsifront_sdev_configure(struct scsi_device *sdev)
> static void scsifront_sdev_destroy(struct scsi_device *sdev)
> {
> struct vscsifrnt_info *info = shost_priv(sdev->host);
> + struct xenbus_device *dev = info->dev;
> + int err;
>
> - if (info && current == info->curr)
> - xenbus_printf(XBT_NIL, info->dev->nodename,
> + if (info && current == info->curr) {
> + err = xenbus_printf(XBT_NIL, info->dev->nodename,
> info->dev_state_path, "%d", XenbusStateClosed);
Same here.
> + if (err)
> + dev_err(&dev->dev, "writing dev_state_path\n");
> + }
> }
>
> static struct scsi_host_template scsifront_sht = {
--
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH v2] scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-12 3:42 [PATCH] scsi: xen-scsifront: add error handling for xenbus_printf Zhouyang Jia
2018-06-13 10:09 ` Finn Thain
@ 2018-06-14 16:08 ` Zhouyang Jia
2018-06-14 21:54 ` Boris Ostrovsky
2018-06-14 22:59 ` [PATCH v3] " Zhouyang Jia
` (2 subsequent siblings)
4 siblings, 1 reply; 14+ messages in thread
From: Zhouyang Jia @ 2018-06-14 16:08 UTC (permalink / raw)
Cc: Zhouyang Jia, Juergen Gross, Boris Ostrovsky,
James E.J. Bottomley, Martin K. Petersen, xen-devel, linux-scsi,
linux-kernel
When xenbus_printf fails, the lack of error-handling code may
cause unexpected results.
This patch adds error-handling code after calling xenbus_printf.
Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
---
v1->v2:
- Fix dereferencing before checking
---
drivers/scsi/xen-scsifront.c | 29 ++++++++++++++++++++++-------
1 file changed, 22 insertions(+), 7 deletions(-)
diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
index 36f59a1..a7f6111 100644
--- a/drivers/scsi/xen-scsifront.c
+++ b/drivers/scsi/xen-scsifront.c
@@ -654,10 +654,16 @@ static int scsifront_dev_reset_handler(struct scsi_cmnd *sc)
static int scsifront_sdev_configure(struct scsi_device *sdev)
{
struct vscsifrnt_info *info = shost_priv(sdev->host);
+ int err;
- if (info && current == info->curr)
- xenbus_printf(XBT_NIL, info->dev->nodename,
+ if (info && current == info->curr) {
+ err = xenbus_printf(XBT_NIL, info->dev->nodename,
info->dev_state_path, "%d", XenbusStateConnected);
+ if (err) {
+ dev_err(&info->dev->dev, "writing dev_state_path\n");
+ return err;
+ }
+ }
return 0;
}
@@ -665,10 +671,14 @@ static int scsifront_sdev_configure(struct scsi_device *sdev)
static void scsifront_sdev_destroy(struct scsi_device *sdev)
{
struct vscsifrnt_info *info = shost_priv(sdev->host);
+ int err;
- if (info && current == info->curr)
- xenbus_printf(XBT_NIL, info->dev->nodename,
+ if (info && current == info->curr) {
+ err = xenbus_printf(XBT_NIL, info->dev->nodename,
info->dev_state_path, "%d", XenbusStateClosed);
+ if (err)
+ dev_err(&info->dev->dev, "writing dev_state_path\n");
+ }
}
static struct scsi_host_template scsifront_sht = {
@@ -1003,9 +1013,11 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
if (scsi_add_device(info->host, chn, tgt, lun)) {
dev_err(&dev->dev, "scsi_add_device\n");
- xenbus_printf(XBT_NIL, dev->nodename,
+ err = xenbus_printf(XBT_NIL, dev->nodename,
info->dev_state_path,
"%d", XenbusStateClosed);
+ if (err)
+ dev_err(&dev->dev, "writing dev_state_path\n");
}
break;
case VSCSIFRONT_OP_DEL_LUN:
@@ -1019,10 +1031,13 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
}
break;
case VSCSIFRONT_OP_READD_LUN:
- if (device_state == XenbusStateConnected)
- xenbus_printf(XBT_NIL, dev->nodename,
+ if (device_state == XenbusStateConnected) {
+ err = xenbus_printf(XBT_NIL, dev->nodename,
info->dev_state_path,
"%d", XenbusStateConnected);
+ if (err)
+ dev_err(&dev->dev, "writing dev_state_path\n");
+ }
break;
default:
break;
--
2.7.4
^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH v2] scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-14 16:08 ` [PATCH v2] " Zhouyang Jia
@ 2018-06-14 21:54 ` Boris Ostrovsky
0 siblings, 0 replies; 14+ messages in thread
From: Boris Ostrovsky @ 2018-06-14 21:54 UTC (permalink / raw)
To: Zhouyang Jia
Cc: Juergen Gross, James E.J. Bottomley, Martin K. Petersen,
xen-devel, linux-scsi, linux-kernel
On 06/14/2018 12:08 PM, Zhouyang Jia wrote:
> When xenbus_printf fails, the lack of error-handling code may
> cause unexpected results.
>
> This patch adds error-handling code after calling xenbus_printf.
>
> Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
> ---
> v1->v2:
> - Fix dereferencing before checking
> ---
> drivers/scsi/xen-scsifront.c | 29 ++++++++++++++++++++++-------
> 1 file changed, 22 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
> index 36f59a1..a7f6111 100644
> --- a/drivers/scsi/xen-scsifront.c
> +++ b/drivers/scsi/xen-scsifront.c
> @@ -654,10 +654,16 @@ static int scsifront_dev_reset_handler(struct scsi_cmnd *sc)
> static int scsifront_sdev_configure(struct scsi_device *sdev)
> {
> struct vscsifrnt_info *info = shost_priv(sdev->host);
> + int err;
>
> - if (info && current == info->curr)
> - xenbus_printf(XBT_NIL, info->dev->nodename,
> + if (info && current == info->curr) {
> + err = xenbus_printf(XBT_NIL, info->dev->nodename,
> info->dev_state_path, "%d", XenbusStateConnected);
> + if (err) {
> + dev_err(&info->dev->dev, "writing dev_state_path\n");
These errors should be reported using xenbus_dev_error().
And the second patch too.
-boris
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH v3] scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-12 3:42 [PATCH] scsi: xen-scsifront: add error handling for xenbus_printf Zhouyang Jia
2018-06-13 10:09 ` Finn Thain
2018-06-14 16:08 ` [PATCH v2] " Zhouyang Jia
@ 2018-06-14 22:59 ` Zhouyang Jia
2018-06-14 23:50 ` kbuild test robot
` (2 more replies)
2018-06-15 1:48 ` [PATCH v4] " Zhouyang Jia
2018-06-15 17:05 ` [PATCH v5] " Zhouyang Jia
4 siblings, 3 replies; 14+ messages in thread
From: Zhouyang Jia @ 2018-06-14 22:59 UTC (permalink / raw)
Cc: Zhouyang Jia, Juergen Gross, Boris Ostrovsky,
James E.J. Bottomley, Martin K. Petersen, xen-devel, linux-scsi,
linux-kernel
When xenbus_printf fails, the lack of error-handling code may
cause unexpected results.
This patch adds error-handling code after calling xenbus_printf.
Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
---
v1->v2:
- Fix dereferencing before checking
v2->v3:
- Use xenbus_dev_error to report errors.
---
drivers/scsi/xen-scsifront.c | 33 ++++++++++++++++++++++++++-------
1 file changed, 26 insertions(+), 7 deletions(-)
diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
index 36f59a1..644d1ce 100644
--- a/drivers/scsi/xen-scsifront.c
+++ b/drivers/scsi/xen-scsifront.c
@@ -654,10 +654,17 @@ static int scsifront_dev_reset_handler(struct scsi_cmnd *sc)
static int scsifront_sdev_configure(struct scsi_device *sdev)
{
struct vscsifrnt_info *info = shost_priv(sdev->host);
+ int err;
- if (info && current == info->curr)
- xenbus_printf(XBT_NIL, info->dev->nodename,
+ if (info && current == info->curr) {
+ err = xenbus_printf(XBT_NIL, info->dev->nodename,
info->dev_state_path, "%d", XenbusStateConnected);
+ if (err) {
+ xenbus_dev_error(&info->dev->dev, err,
+ "%s: writing dev_state_path", __func__);
+ return err;
+ }
+ }
return 0;
}
@@ -665,10 +672,15 @@ static int scsifront_sdev_configure(struct scsi_device *sdev)
static void scsifront_sdev_destroy(struct scsi_device *sdev)
{
struct vscsifrnt_info *info = shost_priv(sdev->host);
+ int err;
- if (info && current == info->curr)
- xenbus_printf(XBT_NIL, info->dev->nodename,
+ if (info && current == info->curr) {
+ err = xenbus_printf(XBT_NIL, info->dev->nodename,
info->dev_state_path, "%d", XenbusStateClosed);
+ if (err)
+ xenbus_dev_error(&info->dev->dev, err,
+ "%s: writing dev_state_path", __func__);
+ }
}
static struct scsi_host_template scsifront_sht = {
@@ -1003,9 +1015,12 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
if (scsi_add_device(info->host, chn, tgt, lun)) {
dev_err(&dev->dev, "scsi_add_device\n");
- xenbus_printf(XBT_NIL, dev->nodename,
+ err = xenbus_printf(XBT_NIL, dev->nodename,
info->dev_state_path,
"%d", XenbusStateClosed);
+ if (err)
+ xenbus_dev_error(&dev->dev, err,
+ "%s: writing dev_state_path", __func__);
}
break;
case VSCSIFRONT_OP_DEL_LUN:
@@ -1019,10 +1034,14 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
}
break;
case VSCSIFRONT_OP_READD_LUN:
- if (device_state == XenbusStateConnected)
- xenbus_printf(XBT_NIL, dev->nodename,
+ if (device_state == XenbusStateConnected) {
+ err = xenbus_printf(XBT_NIL, dev->nodename,
info->dev_state_path,
"%d", XenbusStateConnected);
+ if (err)
+ xenbus_dev_error(&dev->dev, err,
+ "%s: writing dev_state_path", __func__);
+ }
break;
default:
break;
--
2.7.4
^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH v3] scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-14 22:59 ` [PATCH v3] " Zhouyang Jia
@ 2018-06-14 23:50 ` kbuild test robot
2018-06-15 2:32 ` kbuild test robot
2018-06-15 5:44 ` kbuild test robot
2 siblings, 0 replies; 14+ messages in thread
From: kbuild test robot @ 2018-06-14 23:50 UTC (permalink / raw)
To: linux-scsi-owner
Cc: kbuild-all, Zhouyang Jia, Juergen Gross, Boris Ostrovsky,
James E.J. Bottomley, Martin K. Petersen, xen-devel, linux-scsi,
linux-kernel
[-- Attachment #1: Type: text/plain, Size: 3792 bytes --]
Hi,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on xen-tip/linux-next]
[also build test ERROR on v4.17 next-20180614]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/linux-scsi-owner-vger-kernel-org/scsi-xen-scsifront-add-error-handling-for-xenbus_printf/20180615-070404
base: https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git linux-next
config: i386-randconfig-x010-201823 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
drivers/scsi/xen-scsifront.c: In function 'scsifront_sdev_configure':
>> drivers/scsi/xen-scsifront.c:663:21: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&info->dev->dev, err,
^
In file included from drivers/scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct device *'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
drivers/scsi/xen-scsifront.c: In function 'scsifront_sdev_destroy':
drivers/scsi/xen-scsifront.c:681:21: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&info->dev->dev, err,
^
In file included from drivers/scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct device *'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
drivers/scsi/xen-scsifront.c: In function 'scsifront_do_lun_hotplug':
drivers/scsi/xen-scsifront.c:1022:23: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&dev->dev, err,
^
In file included from drivers/scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct device *'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
drivers/scsi/xen-scsifront.c:1042:23: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&dev->dev, err,
^
In file included from drivers/scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct device *'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +/xenbus_dev_error +663 drivers/scsi/xen-scsifront.c
653
654 static int scsifront_sdev_configure(struct scsi_device *sdev)
655 {
656 struct vscsifrnt_info *info = shost_priv(sdev->host);
657 int err;
658
659 if (info && current == info->curr) {
660 err = xenbus_printf(XBT_NIL, info->dev->nodename,
661 info->dev_state_path, "%d", XenbusStateConnected);
662 if (err) {
> 663 xenbus_dev_error(&info->dev->dev, err,
664 "%s: writing dev_state_path", __func__);
665 return err;
666 }
667 }
668
669 return 0;
670 }
671
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 30075 bytes --]
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH v4] scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-12 3:42 [PATCH] scsi: xen-scsifront: add error handling for xenbus_printf Zhouyang Jia
` (2 preceding siblings ...)
2018-06-14 22:59 ` [PATCH v3] " Zhouyang Jia
@ 2018-06-15 1:48 ` Zhouyang Jia
2018-06-15 6:04 ` kbuild test robot
2018-06-15 11:59 ` kbuild test robot
2018-06-15 17:05 ` [PATCH v5] " Zhouyang Jia
4 siblings, 2 replies; 14+ messages in thread
From: Zhouyang Jia @ 2018-06-15 1:48 UTC (permalink / raw)
Cc: Zhouyang Jia, Boris Ostrovsky, Juergen Gross,
James E.J. Bottomley, Martin K. Petersen, xen-devel, linux-scsi,
linux-kernel
When xenbus_printf fails, the lack of error-handling code may
cause unexpected results.
This patch adds error-handling code after calling xenbus_printf.
Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
---
v1->v2:
- Fix dereferencing before checking.
v2->v3:
- Use xenbus_dev_error to report errors.
v3->v4:
- Fix compilation errors.
---
drivers/scsi/xen-scsifront.c | 33 ++++++++++++++++++++++++++-------
1 file changed, 26 insertions(+), 7 deletions(-)
diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
index 36f59a1..be576cb 100644
--- a/drivers/scsi/xen-scsifront.c
+++ b/drivers/scsi/xen-scsifront.c
@@ -654,10 +654,17 @@ static int scsifront_dev_reset_handler(struct scsi_cmnd *sc)
static int scsifront_sdev_configure(struct scsi_device *sdev)
{
struct vscsifrnt_info *info = shost_priv(sdev->host);
+ int err;
- if (info && current == info->curr)
- xenbus_printf(XBT_NIL, info->dev->nodename,
+ if (info && current == info->curr) {
+ err = xenbus_printf(XBT_NIL, info->dev->nodename,
info->dev_state_path, "%d", XenbusStateConnected);
+ if (err) {
+ xenbus_dev_error(&info->dev, err,
+ "%s: writing dev_state_path", __func__);
+ return err;
+ }
+ }
return 0;
}
@@ -665,10 +672,15 @@ static int scsifront_sdev_configure(struct scsi_device *sdev)
static void scsifront_sdev_destroy(struct scsi_device *sdev)
{
struct vscsifrnt_info *info = shost_priv(sdev->host);
+ int err;
- if (info && current == info->curr)
- xenbus_printf(XBT_NIL, info->dev->nodename,
+ if (info && current == info->curr) {
+ err = xenbus_printf(XBT_NIL, info->dev->nodename,
info->dev_state_path, "%d", XenbusStateClosed);
+ if (err)
+ xenbus_dev_error(&info->dev, err,
+ "%s: writing dev_state_path", __func__);
+ }
}
static struct scsi_host_template scsifront_sht = {
@@ -1003,9 +1015,12 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
if (scsi_add_device(info->host, chn, tgt, lun)) {
dev_err(&dev->dev, "scsi_add_device\n");
- xenbus_printf(XBT_NIL, dev->nodename,
+ err = xenbus_printf(XBT_NIL, dev->nodename,
info->dev_state_path,
"%d", XenbusStateClosed);
+ if (err)
+ xenbus_dev_error(dev, err,
+ "%s: writing dev_state_path", __func__);
}
break;
case VSCSIFRONT_OP_DEL_LUN:
@@ -1019,10 +1034,14 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
}
break;
case VSCSIFRONT_OP_READD_LUN:
- if (device_state == XenbusStateConnected)
- xenbus_printf(XBT_NIL, dev->nodename,
+ if (device_state == XenbusStateConnected) {
+ err = xenbus_printf(XBT_NIL, dev->nodename,
info->dev_state_path,
"%d", XenbusStateConnected);
+ if (err)
+ xenbus_dev_error(dev, err,
+ "%s: writing dev_state_path", __func__);
+ }
break;
default:
break;
--
2.7.4
^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH v3] scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-14 22:59 ` [PATCH v3] " Zhouyang Jia
2018-06-14 23:50 ` kbuild test robot
@ 2018-06-15 2:32 ` kbuild test robot
2018-06-15 5:44 ` kbuild test robot
2 siblings, 0 replies; 14+ messages in thread
From: kbuild test robot @ 2018-06-15 2:32 UTC (permalink / raw)
To: linux-scsi-owner
Cc: kbuild-all, Zhouyang Jia, Juergen Gross, Boris Ostrovsky,
James E.J. Bottomley, Martin K. Petersen, xen-devel, linux-scsi,
linux-kernel
[-- Attachment #1: Type: text/plain, Size: 3570 bytes --]
Hi,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on xen-tip/linux-next]
[also build test WARNING on v4.17 next-20180614]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/linux-scsi-owner-vger-kernel-org/scsi-xen-scsifront-add-error-handling-for-xenbus_printf/20180615-070404
base: https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git linux-next
config: i386-randconfig-sb0-06140922 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All warnings (new ones prefixed by >>):
drivers//scsi/xen-scsifront.c: In function 'scsifront_sdev_configure':
>> drivers//scsi/xen-scsifront.c:663:21: warning: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type
xenbus_dev_error(&info->dev->dev, err,
^
In file included from drivers//scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct device *'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^
drivers//scsi/xen-scsifront.c: In function 'scsifront_sdev_destroy':
drivers//scsi/xen-scsifront.c:681:21: warning: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type
xenbus_dev_error(&info->dev->dev, err,
^
In file included from drivers//scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct device *'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^
drivers//scsi/xen-scsifront.c: In function 'scsifront_do_lun_hotplug':
drivers//scsi/xen-scsifront.c:1022:23: warning: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type
xenbus_dev_error(&dev->dev, err,
^
In file included from drivers//scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct device *'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^
drivers//scsi/xen-scsifront.c:1042:23: warning: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type
xenbus_dev_error(&dev->dev, err,
^
In file included from drivers//scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct device *'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^
vim +/xenbus_dev_error +663 drivers//scsi/xen-scsifront.c
653
654 static int scsifront_sdev_configure(struct scsi_device *sdev)
655 {
656 struct vscsifrnt_info *info = shost_priv(sdev->host);
657 int err;
658
659 if (info && current == info->curr) {
660 err = xenbus_printf(XBT_NIL, info->dev->nodename,
661 info->dev_state_path, "%d", XenbusStateConnected);
662 if (err) {
> 663 xenbus_dev_error(&info->dev->dev, err,
664 "%s: writing dev_state_path", __func__);
665 return err;
666 }
667 }
668
669 return 0;
670 }
671
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 32162 bytes --]
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v3] scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-14 22:59 ` [PATCH v3] " Zhouyang Jia
2018-06-14 23:50 ` kbuild test robot
2018-06-15 2:32 ` kbuild test robot
@ 2018-06-15 5:44 ` kbuild test robot
2 siblings, 0 replies; 14+ messages in thread
From: kbuild test robot @ 2018-06-15 5:44 UTC (permalink / raw)
To: linux-scsi-owner
Cc: kbuild-all, Zhouyang Jia, Juergen Gross, Boris Ostrovsky,
James E.J. Bottomley, Martin K. Petersen, xen-devel, linux-scsi,
linux-kernel
Hi,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on xen-tip/linux-next]
[also build test WARNING on v4.17 next-20180614]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/linux-scsi-owner-vger-kernel-org/scsi-xen-scsifront-add-error-handling-for-xenbus_printf/20180615-070404
base: https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git linux-next
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
drivers/scsi/xen-scsifront.c:267:21: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:440:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:440:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:473:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:473:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:474:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:474:33: sparse: expression using sizeof(void)
>> drivers/scsi/xen-scsifront.c:663:47: sparse: incorrect type in argument 1 (different base types) @@ expected struct xenbus_device *dev @@ got xenbus_device *dev @@
drivers/scsi/xen-scsifront.c:663:47: expected struct xenbus_device *dev
drivers/scsi/xen-scsifront.c:663:47: got struct device *<noident>
drivers/scsi/xen-scsifront.c:681:47: sparse: incorrect type in argument 1 (different base types) @@ expected struct xenbus_device *dev @@ got xenbus_device *dev @@
drivers/scsi/xen-scsifront.c:681:47: expected struct xenbus_device *dev
drivers/scsi/xen-scsifront.c:681:47: got struct device *<noident>
drivers/scsi/xen-scsifront.c:1022:59: sparse: incorrect type in argument 1 (different base types) @@ expected struct xenbus_device *dev @@ got xenbus_device *dev @@
drivers/scsi/xen-scsifront.c:1022:59: expected struct xenbus_device *dev
drivers/scsi/xen-scsifront.c:1022:59: got struct device *<noident>
drivers/scsi/xen-scsifront.c:1042:59: sparse: incorrect type in argument 1 (different base types) @@ expected struct xenbus_device *dev @@ got xenbus_device *dev @@
drivers/scsi/xen-scsifront.c:1042:59: expected struct xenbus_device *dev
drivers/scsi/xen-scsifront.c:1042:59: got struct device *<noident>
drivers/scsi/xen-scsifront.c:1063:19: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:1064:19: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:1065:19: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c: In function 'scsifront_sdev_configure':
drivers/scsi/xen-scsifront.c:663:21: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&info->dev->dev, err,
^
In file included from drivers/scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct device *'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
drivers/scsi/xen-scsifront.c: In function 'scsifront_sdev_destroy':
drivers/scsi/xen-scsifront.c:681:21: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&info->dev->dev, err,
^
In file included from drivers/scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct device *'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
drivers/scsi/xen-scsifront.c: In function 'scsifront_do_lun_hotplug':
drivers/scsi/xen-scsifront.c:1022:23: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&dev->dev, err,
^
In file included from drivers/scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct device *'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
drivers/scsi/xen-scsifront.c:1042:23: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&dev->dev, err,
^
In file included from drivers/scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct device *'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +663 drivers/scsi/xen-scsifront.c
653
654 static int scsifront_sdev_configure(struct scsi_device *sdev)
655 {
656 struct vscsifrnt_info *info = shost_priv(sdev->host);
657 int err;
658
659 if (info && current == info->curr) {
660 err = xenbus_printf(XBT_NIL, info->dev->nodename,
661 info->dev_state_path, "%d", XenbusStateConnected);
662 if (err) {
> 663 xenbus_dev_error(&info->dev->dev, err,
664 "%s: writing dev_state_path", __func__);
665 return err;
666 }
667 }
668
669 return 0;
670 }
671
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v4] scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-15 1:48 ` [PATCH v4] " Zhouyang Jia
@ 2018-06-15 6:04 ` kbuild test robot
2018-06-15 11:59 ` kbuild test robot
1 sibling, 0 replies; 14+ messages in thread
From: kbuild test robot @ 2018-06-15 6:04 UTC (permalink / raw)
To: linux-kernel-owner
Cc: kbuild-all, Zhouyang Jia, Boris Ostrovsky, Juergen Gross,
James E.J. Bottomley, Martin K. Petersen, xen-devel, linux-scsi,
linux-kernel
Hi,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on xen-tip/linux-next]
[also build test WARNING on v4.17 next-20180614]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/linux-kernel-owner-vger-kernel-org/scsi-xen-scsifront-add-error-handling-for-xenbus_printf/20180615-094919
base: https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git linux-next
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
drivers/scsi/xen-scsifront.c:267:21: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:440:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:440:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:473:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:473:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:474:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:474:33: sparse: expression using sizeof(void)
>> drivers/scsi/xen-scsifront.c:663:43: sparse: incorrect type in argument 1 (different base types) @@ expected struct xenbus_device *dev @@ got sstruct xenbus_device *dev @@
drivers/scsi/xen-scsifront.c:663:43: expected struct xenbus_device *dev
drivers/scsi/xen-scsifront.c:663:43: got struct xenbus_device **<noident>
drivers/scsi/xen-scsifront.c:681:43: sparse: incorrect type in argument 1 (different base types) @@ expected struct xenbus_device *dev @@ got sstruct xenbus_device *dev @@
drivers/scsi/xen-scsifront.c:681:43: expected struct xenbus_device *dev
drivers/scsi/xen-scsifront.c:681:43: got struct xenbus_device **<noident>
drivers/scsi/xen-scsifront.c:1063:19: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:1064:19: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:1065:19: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c: In function 'scsifront_sdev_configure':
drivers/scsi/xen-scsifront.c:663:21: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&info->dev, err,
^
In file included from drivers/scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct xenbus_device **'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
drivers/scsi/xen-scsifront.c: In function 'scsifront_sdev_destroy':
drivers/scsi/xen-scsifront.c:681:21: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&info->dev, err,
^
In file included from drivers/scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct xenbus_device **'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +663 drivers/scsi/xen-scsifront.c
653
654 static int scsifront_sdev_configure(struct scsi_device *sdev)
655 {
656 struct vscsifrnt_info *info = shost_priv(sdev->host);
657 int err;
658
659 if (info && current == info->curr) {
660 err = xenbus_printf(XBT_NIL, info->dev->nodename,
661 info->dev_state_path, "%d", XenbusStateConnected);
662 if (err) {
> 663 xenbus_dev_error(&info->dev, err,
664 "%s: writing dev_state_path", __func__);
665 return err;
666 }
667 }
668
669 return 0;
670 }
671
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v4] scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-15 1:48 ` [PATCH v4] " Zhouyang Jia
2018-06-15 6:04 ` kbuild test robot
@ 2018-06-15 11:59 ` kbuild test robot
1 sibling, 0 replies; 14+ messages in thread
From: kbuild test robot @ 2018-06-15 11:59 UTC (permalink / raw)
To: linux-kernel-owner
Cc: kbuild-all, Zhouyang Jia, Boris Ostrovsky, Juergen Gross,
James E.J. Bottomley, Martin K. Petersen, xen-devel, linux-scsi,
linux-kernel
[-- Attachment #1: Type: text/plain, Size: 2698 bytes --]
Hi,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on xen-tip/linux-next]
[also build test ERROR on v4.17 next-20180615]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/linux-kernel-owner-vger-kernel-org/scsi-xen-scsifront-add-error-handling-for-xenbus_printf/20180615-094919
base: https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git linux-next
config: x86_64-fedora-25 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
All errors (new ones prefixed by >>):
drivers//scsi/xen-scsifront.c: In function 'scsifront_sdev_configure':
>> drivers//scsi/xen-scsifront.c:663:21: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&info->dev, err,
^
In file included from drivers//scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct xenbus_device **'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
drivers//scsi/xen-scsifront.c: In function 'scsifront_sdev_destroy':
drivers//scsi/xen-scsifront.c:681:21: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&info->dev, err,
^
In file included from drivers//scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct xenbus_device **'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +/xenbus_dev_error +663 drivers//scsi/xen-scsifront.c
653
654 static int scsifront_sdev_configure(struct scsi_device *sdev)
655 {
656 struct vscsifrnt_info *info = shost_priv(sdev->host);
657 int err;
658
659 if (info && current == info->curr) {
660 err = xenbus_printf(XBT_NIL, info->dev->nodename,
661 info->dev_state_path, "%d", XenbusStateConnected);
662 if (err) {
> 663 xenbus_dev_error(&info->dev, err,
664 "%s: writing dev_state_path", __func__);
665 return err;
666 }
667 }
668
669 return 0;
670 }
671
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 47744 bytes --]
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH v5] scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-12 3:42 [PATCH] scsi: xen-scsifront: add error handling for xenbus_printf Zhouyang Jia
` (3 preceding siblings ...)
2018-06-15 1:48 ` [PATCH v4] " Zhouyang Jia
@ 2018-06-15 17:05 ` Zhouyang Jia
2018-06-19 12:53 ` Juergen Gross
2018-06-19 13:02 ` Juergen Gross
4 siblings, 2 replies; 14+ messages in thread
From: Zhouyang Jia @ 2018-06-15 17:05 UTC (permalink / raw)
Cc: Zhouyang Jia, Juergen Gross, Boris Ostrovsky,
James E.J. Bottomley, Martin K. Petersen, xen-devel, linux-scsi,
linux-kernel
When xenbus_printf fails, the lack of error-handling code may
cause unexpected results.
This patch adds error-handling code after calling xenbus_printf.
Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
v1->v2:
- Fix dereferencing before checking.
v2->v3:
- Use xenbus_dev_error to report errors.
v3->v4:
- Fix compilation errors.
v4->v5:
- Fix compilation errors.
---
drivers/scsi/xen-scsifront.c | 33 ++++++++++++++++++++++++++-------
1 file changed, 26 insertions(+), 7 deletions(-)
diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
index 36f59a1..61389bd 100644
--- a/drivers/scsi/xen-scsifront.c
+++ b/drivers/scsi/xen-scsifront.c
@@ -654,10 +654,17 @@ static int scsifront_dev_reset_handler(struct scsi_cmnd *sc)
static int scsifront_sdev_configure(struct scsi_device *sdev)
{
struct vscsifrnt_info *info = shost_priv(sdev->host);
+ int err;
- if (info && current == info->curr)
- xenbus_printf(XBT_NIL, info->dev->nodename,
+ if (info && current == info->curr) {
+ err = xenbus_printf(XBT_NIL, info->dev->nodename,
info->dev_state_path, "%d", XenbusStateConnected);
+ if (err) {
+ xenbus_dev_error(info->dev, err,
+ "%s: writing dev_state_path", __func__);
+ return err;
+ }
+ }
return 0;
}
@@ -665,10 +672,15 @@ static int scsifront_sdev_configure(struct scsi_device *sdev)
static void scsifront_sdev_destroy(struct scsi_device *sdev)
{
struct vscsifrnt_info *info = shost_priv(sdev->host);
+ int err;
- if (info && current == info->curr)
- xenbus_printf(XBT_NIL, info->dev->nodename,
+ if (info && current == info->curr) {
+ err = xenbus_printf(XBT_NIL, info->dev->nodename,
info->dev_state_path, "%d", XenbusStateClosed);
+ if (err)
+ xenbus_dev_error(info->dev, err,
+ "%s: writing dev_state_path", __func__);
+ }
}
static struct scsi_host_template scsifront_sht = {
@@ -1003,9 +1015,12 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
if (scsi_add_device(info->host, chn, tgt, lun)) {
dev_err(&dev->dev, "scsi_add_device\n");
- xenbus_printf(XBT_NIL, dev->nodename,
+ err = xenbus_printf(XBT_NIL, dev->nodename,
info->dev_state_path,
"%d", XenbusStateClosed);
+ if (err)
+ xenbus_dev_error(dev, err,
+ "%s: writing dev_state_path", __func__);
}
break;
case VSCSIFRONT_OP_DEL_LUN:
@@ -1019,10 +1034,14 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
}
break;
case VSCSIFRONT_OP_READD_LUN:
- if (device_state == XenbusStateConnected)
- xenbus_printf(XBT_NIL, dev->nodename,
+ if (device_state == XenbusStateConnected) {
+ err = xenbus_printf(XBT_NIL, dev->nodename,
info->dev_state_path,
"%d", XenbusStateConnected);
+ if (err)
+ xenbus_dev_error(dev, err,
+ "%s: writing dev_state_path", __func__);
+ }
break;
default:
break;
--
2.7.4
^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH v5] scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-15 17:05 ` [PATCH v5] " Zhouyang Jia
@ 2018-06-19 12:53 ` Juergen Gross
2018-06-19 13:02 ` Juergen Gross
1 sibling, 0 replies; 14+ messages in thread
From: Juergen Gross @ 2018-06-19 12:53 UTC (permalink / raw)
To: Zhouyang Jia
Cc: Boris Ostrovsky, James E.J. Bottomley, Martin K. Petersen,
xen-devel, linux-scsi, linux-kernel
On 15/06/18 19:05, Zhouyang Jia wrote:
> When xenbus_printf fails, the lack of error-handling code may
> cause unexpected results.
>
> This patch adds error-handling code after calling xenbus_printf.
>
> Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Juergen
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v5] scsi: xen-scsifront: add error handling for xenbus_printf
2018-06-15 17:05 ` [PATCH v5] " Zhouyang Jia
2018-06-19 12:53 ` Juergen Gross
@ 2018-06-19 13:02 ` Juergen Gross
1 sibling, 0 replies; 14+ messages in thread
From: Juergen Gross @ 2018-06-19 13:02 UTC (permalink / raw)
To: Zhouyang Jia
Cc: Boris Ostrovsky, James E.J. Bottomley, Martin K. Petersen,
xen-devel, linux-scsi, linux-kernel
On 15/06/18 19:05, Zhouyang Jia wrote:
> When xenbus_printf fails, the lack of error-handling code may
> cause unexpected results.
>
> This patch adds error-handling code after calling xenbus_printf.
>
> Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
Pushed to xen/tip.git for-linus-4.18
Juergen
^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2018-06-19 13:03 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-06-12 3:42 [PATCH] scsi: xen-scsifront: add error handling for xenbus_printf Zhouyang Jia
2018-06-13 10:09 ` Finn Thain
2018-06-14 16:08 ` [PATCH v2] " Zhouyang Jia
2018-06-14 21:54 ` Boris Ostrovsky
2018-06-14 22:59 ` [PATCH v3] " Zhouyang Jia
2018-06-14 23:50 ` kbuild test robot
2018-06-15 2:32 ` kbuild test robot
2018-06-15 5:44 ` kbuild test robot
2018-06-15 1:48 ` [PATCH v4] " Zhouyang Jia
2018-06-15 6:04 ` kbuild test robot
2018-06-15 11:59 ` kbuild test robot
2018-06-15 17:05 ` [PATCH v5] " Zhouyang Jia
2018-06-19 12:53 ` Juergen Gross
2018-06-19 13:02 ` Juergen Gross
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