[PATCH] perf tools: return errcode in cs_etm__process_auxtrace_info

[PATCH] perf tools: return errcode in cs_etm__process_auxtrace_info

[Yue Haibing]

From: YueHaibing <yuehaibing@huawei.com>

'err' is set in err path, but it's not returned to callers.
Also fix a pass zero to PTR_ERR issue.

Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
 tools/perf/util/cs-etm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 1108049..111f33c 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -1908,7 +1908,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
 
 		/* Something went wrong, no need to continue */
 		if (!inode) {
-			err = PTR_ERR(inode);
+			err = -ENOMEM;
 			goto err_free_metadata;
 		}
 
@@ -2023,5 +2023,5 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
 err_free_hdr:
 	zfree(&hdr);
 
-	return -EINVAL;
+	return err;
 }
-- 
2.7.0

Re: [PATCH] perf tools: return errcode in cs_etm__process_auxtrace_info

[Mathieu Poirier]

Good day Yue,

On Thu, 14 Mar 2019 at 20:28, Yue Haibing <yuehaibing@huawei.com> wrote:
>
> From: YueHaibing <yuehaibing@huawei.com>
>
> 'err' is set in err path, but it's not returned to callers.
> Also fix a pass zero to PTR_ERR issue.
>
> Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
> ---
>  tools/perf/util/cs-etm.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
> index 1108049..111f33c 100644
> --- a/tools/perf/util/cs-etm.c
> +++ b/tools/perf/util/cs-etm.c
> @@ -1908,7 +1908,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
>
>                 /* Something went wrong, no need to continue */
>                 if (!inode) {
> -                       err = PTR_ERR(inode);
> +                       err = -ENOMEM;

Good catch.

>                         goto err_free_metadata;
>                 }
>
> @@ -2023,5 +2023,5 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
>  err_free_hdr:
>         zfree(&hdr);
>
> -       return -EINVAL;
> +       return err;

If we do that we need to set 'err' to an error code here [1] and here
[2].  Do you think you could fix this and roll another version of your
patch?

[1]. https://elixir.bootlin.com/linux/v5.1-rc1/source/tools/perf/util/cs-etm.c#L1967
[2]. https://elixir.bootlin.com/linux/v5.1-rc1/source/tools/perf/util/cs-etm.c#L1981
>  }
> --
> 2.7.0
>
>

Re: [PATCH] perf tools: return errcode in cs_etm__process_auxtrace_info

[Arnaldo Carvalho de Melo]

Em Fri, Mar 15, 2019 at 10:26:49AM +0800, Yue Haibing escreveu:
> From: YueHaibing <yuehaibing@huawei.com>
> 
> 'err' is set in err path, but it's not returned to callers.
> Also fix a pass zero to PTR_ERR issue.

Next time please submit two patches, one for the PTR_ERR and another for
not throwing away the err = -E!INVAL and returning just -EINVAL, I'm
doing it this time.
 
 - Arnaldo

> Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
> ---
>  tools/perf/util/cs-etm.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
> index 1108049..111f33c 100644
> --- a/tools/perf/util/cs-etm.c
> +++ b/tools/perf/util/cs-etm.c
> @@ -1908,7 +1908,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
>  
>  		/* Something went wrong, no need to continue */
>  		if (!inode) {
> -			err = PTR_ERR(inode);
> +			err = -ENOMEM;
>  			goto err_free_metadata;
>  		}
>  
> @@ -2023,5 +2023,5 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
>  err_free_hdr:
>  	zfree(&hdr);
>  
> -	return -EINVAL;
> +	return err;
>  }
> -- 
> 2.7.0
> 

-- 

- Arnaldo

Re: [PATCH] perf tools: return errcode in cs_etm__process_auxtrace_info

[Mathieu Poirier]

On Mon, 18 Mar 2019 at 11:15, Arnaldo Carvalho de Melo
<arnaldo.melo@gmail.com> wrote:
>
> Em Fri, Mar 15, 2019 at 10:26:49AM +0800, Yue Haibing escreveu:
> > From: YueHaibing <yuehaibing@huawei.com>
> >
> > 'err' is set in err path, but it's not returned to callers.
> > Also fix a pass zero to PTR_ERR issue.
>
> Next time please submit two patches, one for the PTR_ERR and another for
> not throwing away the err = -E!INVAL and returning just -EINVAL, I'm
> doing it this time.
>

Please hold off on that - I've asked for other modifications to be
done on this patch.

Mathieu

>  - Arnaldo
>
> > Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
> > Signed-off-by: YueHaibing <yuehaibing@huawei.com>
> > ---
> >  tools/perf/util/cs-etm.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
> > index 1108049..111f33c 100644
> > --- a/tools/perf/util/cs-etm.c
> > +++ b/tools/perf/util/cs-etm.c
> > @@ -1908,7 +1908,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
> >
> >               /* Something went wrong, no need to continue */
> >               if (!inode) {
> > -                     err = PTR_ERR(inode);
> > +                     err = -ENOMEM;
> >                       goto err_free_metadata;
> >               }
> >
> > @@ -2023,5 +2023,5 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
> >  err_free_hdr:
> >       zfree(&hdr);
> >
> > -     return -EINVAL;
> > +     return err;
> >  }
> > --
> > 2.7.0
> >
>
> --
>
> - Arnaldo

Re: [PATCH] perf tools: return errcode in cs_etm__process_auxtrace_info

[Arnaldo Carvalho de Melo]

Em Tue, Mar 19, 2019 at 08:38:32AM -0600, Mathieu Poirier escreveu:
> On Mon, 18 Mar 2019 at 11:15, Arnaldo Carvalho de Melo
> <arnaldo.melo@gmail.com> wrote:
> >
> > Em Fri, Mar 15, 2019 at 10:26:49AM +0800, Yue Haibing escreveu:
> > > From: YueHaibing <yuehaibing@huawei.com>
> > >
> > > 'err' is set in err path, but it's not returned to callers.
> > > Also fix a pass zero to PTR_ERR issue.
> >
> > Next time please submit two patches, one for the PTR_ERR and another for
> > not throwing away the err = -E!INVAL and returning just -EINVAL, I'm
> > doing it this time.
> >
> 
> Please hold off on that - I've asked for other modifications to be
> done on this patch.

Do you really think that it is necessary to hold? The fixes are trivial
and I already have them split and applied, see them below, I think
whatever other changes can be done in further patches, no?

- Arnaldo

From 6c5c248935a4da12a582b1518a38ec35044833ee Mon Sep 17 00:00:00 2001
From: YueHaibing <yuehaibing@huawei.com>
Date: Fri, 15 Mar 2019 10:26:49 +0800
Subject: [PATCH 24/42] perf cs-etm: return errcode in
 cs_etm__process_auxtrace_info()

'err' is set in err path, but it's not returned to callers. Don't always return
-EINVAL, return err.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki K Poulouse <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
Link: http://lkml.kernel.org/r/20190315022649.17848-1-yuehaibing@huawei.com
[ split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/cs-etm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 110804936fc3..2257ac4dbff2 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -2023,5 +2023,5 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
 err_free_hdr:
 	zfree(&hdr);
 
-	return -EINVAL;
+	return err;
 }
-- 
2.20.1

From 4ab1e71e45a91220bdca7fc3b79c600df81d9234 Mon Sep 17 00:00:00 2001
From: YueHaibing <yuehaibing@huawei.com>
Date: Fri, 15 Mar 2019 10:26:49 +0800
Subject: [PATCH 25/42] perf cs-etm: Remove errnoeous ERR_PTR() usage in in
 cs_etm__process_auxtrace_info

intlist__findnew() doesn't uses ERR_PTR() as a return mechanism so its callers
shouldn't try to extract the error using PTR_ERR(ret-from-intlist__findnew()),
make cs_etm__process_auxtrace_info9) return -ENOMEM instead.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki K Poulouse <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
Link: http://lkml.kernel.org/r/20190315022649.17848-1-yuehaibing@huawei.com
[ split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/cs-etm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 2257ac4dbff2..111f33cd1204 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -1908,7 +1908,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
 
 		/* Something went wrong, no need to continue */
 		if (!inode) {
-			err = PTR_ERR(inode);
+			err = -ENOMEM;
 			goto err_free_metadata;
 		}
 
-- 
2.20.1

Re: [PATCH] perf tools: return errcode in cs_etm__process_auxtrace_info

[Mathieu Poirier]

On Tue, Mar 19, 2019 at 11:46:31AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Tue, Mar 19, 2019 at 08:38:32AM -0600, Mathieu Poirier escreveu:
> > On Mon, 18 Mar 2019 at 11:15, Arnaldo Carvalho de Melo
> > <arnaldo.melo@gmail.com> wrote:
> > >
> > > Em Fri, Mar 15, 2019 at 10:26:49AM +0800, Yue Haibing escreveu:
> > > > From: YueHaibing <yuehaibing@huawei.com>
> > > >
> > > > 'err' is set in err path, but it's not returned to callers.
> > > > Also fix a pass zero to PTR_ERR issue.
> > >
> > > Next time please submit two patches, one for the PTR_ERR and another for
> > > not throwing away the err = -E!INVAL and returning just -EINVAL, I'm
> > > doing it this time.
> > >
> > 
> > Please hold off on that - I've asked for other modifications to be
> > done on this patch.
> 
> Do you really think that it is necessary to hold? The fixes are trivial
> and I already have them split and applied, see them below, I think
> whatever other changes can be done in further patches, no?

Proceeding with the patches below would created two new bugs, hence asking Yue
for modifications.

Mathieu  

> 
> - Arnaldo
> 
> From 6c5c248935a4da12a582b1518a38ec35044833ee Mon Sep 17 00:00:00 2001
> From: YueHaibing <yuehaibing@huawei.com>
> Date: Fri, 15 Mar 2019 10:26:49 +0800
> Subject: [PATCH 24/42] perf cs-etm: return errcode in
>  cs_etm__process_auxtrace_info()
> 
> 'err' is set in err path, but it's not returned to callers. Don't always return
> -EINVAL, return err.
> 
> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> Cc: Jiri Olsa <jolsa@redhat.com>
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Cc: Namhyung Kim <namhyung@kernel.org>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Suzuki K Poulouse <suzuki.poulose@arm.com>
> Cc: linux-arm-kernel@lists.infradead.org
> Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
> Link: http://lkml.kernel.org/r/20190315022649.17848-1-yuehaibing@huawei.com
> [ split from a larger patch ]
> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
> ---
>  tools/perf/util/cs-etm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
> index 110804936fc3..2257ac4dbff2 100644
> --- a/tools/perf/util/cs-etm.c
> +++ b/tools/perf/util/cs-etm.c
> @@ -2023,5 +2023,5 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
>  err_free_hdr:
>  	zfree(&hdr);
>  
> -	return -EINVAL;
> +	return err;
>  }
> -- 
> 2.20.1
> 
> From 4ab1e71e45a91220bdca7fc3b79c600df81d9234 Mon Sep 17 00:00:00 2001
> From: YueHaibing <yuehaibing@huawei.com>
> Date: Fri, 15 Mar 2019 10:26:49 +0800
> Subject: [PATCH 25/42] perf cs-etm: Remove errnoeous ERR_PTR() usage in in
>  cs_etm__process_auxtrace_info
> 
> intlist__findnew() doesn't uses ERR_PTR() as a return mechanism so its callers
> shouldn't try to extract the error using PTR_ERR(ret-from-intlist__findnew()),
> make cs_etm__process_auxtrace_info9) return -ENOMEM instead.
> 
> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> Cc: Jiri Olsa <jolsa@redhat.com>
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Cc: Namhyung Kim <namhyung@kernel.org>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Suzuki K Poulouse <suzuki.poulose@arm.com>
> Cc: linux-arm-kernel@lists.infradead.org
> Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
> Link: http://lkml.kernel.org/r/20190315022649.17848-1-yuehaibing@huawei.com
> [ split from a larger patch ]
> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
> ---
>  tools/perf/util/cs-etm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
> index 2257ac4dbff2..111f33cd1204 100644
> --- a/tools/perf/util/cs-etm.c
> +++ b/tools/perf/util/cs-etm.c
> @@ -1908,7 +1908,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
>  
>  		/* Something went wrong, no need to continue */
>  		if (!inode) {
> -			err = PTR_ERR(inode);
> +			err = -ENOMEM;
>  			goto err_free_metadata;
>  		}
>  
> -- 
> 2.20.1
> 

Re: [PATCH] perf tools: return errcode in cs_etm__process_auxtrace_info

[YueHaibing]

On 2019/3/19 22:55, Mathieu Poirier wrote:
> On Tue, Mar 19, 2019 at 11:46:31AM -0300, Arnaldo Carvalho de Melo wrote:
>> Em Tue, Mar 19, 2019 at 08:38:32AM -0600, Mathieu Poirier escreveu:
>>> On Mon, 18 Mar 2019 at 11:15, Arnaldo Carvalho de Melo
>>> <arnaldo.melo@gmail.com> wrote:
>>>>
>>>> Em Fri, Mar 15, 2019 at 10:26:49AM +0800, Yue Haibing escreveu:
>>>>> From: YueHaibing <yuehaibing@huawei.com>
>>>>>
>>>>> 'err' is set in err path, but it's not returned to callers.
>>>>> Also fix a pass zero to PTR_ERR issue.
>>>>
>>>> Next time please submit two patches, one for the PTR_ERR and another for
>>>> not throwing away the err = -E!INVAL and returning just -EINVAL, I'm
>>>> doing it this time.
>>>>
>>>
>>> Please hold off on that - I've asked for other modifications to be
>>> done on this patch.
>>
>> Do you really think that it is necessary to hold? The fixes are trivial
>> and I already have them split and applied, see them below, I think
>> whatever other changes can be done in further patches, no?
> 
> Proceeding with the patches below would created two new bugs, hence asking Yue
> for modifications.


Sorry for late, then I can send a new patch to fix the two new bugs.

> 
> Mathieu  
> 
>>
>> - Arnaldo
>>
>> From 6c5c248935a4da12a582b1518a38ec35044833ee Mon Sep 17 00:00:00 2001
>> From: YueHaibing <yuehaibing@huawei.com>
>> Date: Fri, 15 Mar 2019 10:26:49 +0800
>> Subject: [PATCH 24/42] perf cs-etm: return errcode in
>>  cs_etm__process_auxtrace_info()
>>
>> 'err' is set in err path, but it's not returned to callers. Don't always return
>> -EINVAL, return err.
>>
>> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
>> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
>> Cc: Jiri Olsa <jolsa@redhat.com>
>> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
>> Cc: Namhyung Kim <namhyung@kernel.org>
>> Cc: Peter Zijlstra <peterz@infradead.org>
>> Cc: Suzuki K Poulouse <suzuki.poulose@arm.com>
>> Cc: linux-arm-kernel@lists.infradead.org
>> Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
>> Link: http://lkml.kernel.org/r/20190315022649.17848-1-yuehaibing@huawei.com
>> [ split from a larger patch ]
>> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
>> ---
>>  tools/perf/util/cs-etm.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
>> index 110804936fc3..2257ac4dbff2 100644
>> --- a/tools/perf/util/cs-etm.c
>> +++ b/tools/perf/util/cs-etm.c
>> @@ -2023,5 +2023,5 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
>>  err_free_hdr:
>>  	zfree(&hdr);
>>  
>> -	return -EINVAL;
>> +	return err;
>>  }
>> -- 
>> 2.20.1
>>
>> From 4ab1e71e45a91220bdca7fc3b79c600df81d9234 Mon Sep 17 00:00:00 2001
>> From: YueHaibing <yuehaibing@huawei.com>
>> Date: Fri, 15 Mar 2019 10:26:49 +0800
>> Subject: [PATCH 25/42] perf cs-etm: Remove errnoeous ERR_PTR() usage in in
>>  cs_etm__process_auxtrace_info
>>
>> intlist__findnew() doesn't uses ERR_PTR() as a return mechanism so its callers
>> shouldn't try to extract the error using PTR_ERR(ret-from-intlist__findnew()),
>> make cs_etm__process_auxtrace_info9) return -ENOMEM instead.
>>
>> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
>> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
>> Cc: Jiri Olsa <jolsa@redhat.com>
>> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
>> Cc: Namhyung Kim <namhyung@kernel.org>
>> Cc: Peter Zijlstra <peterz@infradead.org>
>> Cc: Suzuki K Poulouse <suzuki.poulose@arm.com>
>> Cc: linux-arm-kernel@lists.infradead.org
>> Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
>> Link: http://lkml.kernel.org/r/20190315022649.17848-1-yuehaibing@huawei.com
>> [ split from a larger patch ]
>> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
>> ---
>>  tools/perf/util/cs-etm.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
>> index 2257ac4dbff2..111f33cd1204 100644
>> --- a/tools/perf/util/cs-etm.c
>> +++ b/tools/perf/util/cs-etm.c
>> @@ -1908,7 +1908,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
>>  
>>  		/* Something went wrong, no need to continue */
>>  		if (!inode) {
>> -			err = PTR_ERR(inode);
>> +			err = -ENOMEM;
>>  			goto err_free_metadata;
>>  		}
>>  
>> -- 
>> 2.20.1
>>
> 
> .
> 

Re: [PATCH] perf tools: return errcode in cs_etm__process_auxtrace_info

[Arnaldo Carvalho de Melo]

Em Tue, Mar 19, 2019 at 08:55:25AM -0600, Mathieu Poirier escreveu:
> On Tue, Mar 19, 2019 at 11:46:31AM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Tue, Mar 19, 2019 at 08:38:32AM -0600, Mathieu Poirier escreveu:
> > > On Mon, 18 Mar 2019 at 11:15, Arnaldo Carvalho de Melo
> > > <arnaldo.melo@gmail.com> wrote:
> > > >
> > > > Em Fri, Mar 15, 2019 at 10:26:49AM +0800, Yue Haibing escreveu:
> > > > > From: YueHaibing <yuehaibing@huawei.com>
> > > > >
> > > > > 'err' is set in err path, but it's not returned to callers.
> > > > > Also fix a pass zero to PTR_ERR issue.
> > > >
> > > > Next time please submit two patches, one for the PTR_ERR and another for
> > > > not throwing away the err = -E!INVAL and returning just -EINVAL, I'm
> > > > doing it this time.
> > > >
> > > 
> > > Please hold off on that - I've asked for other modifications to be
> > > done on this patch.
> > 
> > Do you really think that it is necessary to hold? The fixes are trivial
> > and I already have them split and applied, see them below, I think
> > whatever other changes can be done in further patches, no?
> 
> Proceeding with the patches below would created two new bugs, hence asking Yue
> for modifications.

Ok, I'll take your word on it then, dropping the patches.

- Arnaldo
 
> Mathieu  
> 
> > 
> > - Arnaldo
> > 
> > From 6c5c248935a4da12a582b1518a38ec35044833ee Mon Sep 17 00:00:00 2001
> > From: YueHaibing <yuehaibing@huawei.com>
> > Date: Fri, 15 Mar 2019 10:26:49 +0800
> > Subject: [PATCH 24/42] perf cs-etm: return errcode in
> >  cs_etm__process_auxtrace_info()
> > 
> > 'err' is set in err path, but it's not returned to callers. Don't always return
> > -EINVAL, return err.
> > 
> > Signed-off-by: YueHaibing <yuehaibing@huawei.com>
> > Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> > Cc: Jiri Olsa <jolsa@redhat.com>
> > Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> > Cc: Namhyung Kim <namhyung@kernel.org>
> > Cc: Peter Zijlstra <peterz@infradead.org>
> > Cc: Suzuki K Poulouse <suzuki.poulose@arm.com>
> > Cc: linux-arm-kernel@lists.infradead.org
> > Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
> > Link: http://lkml.kernel.org/r/20190315022649.17848-1-yuehaibing@huawei.com
> > [ split from a larger patch ]
> > Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
> > ---
> >  tools/perf/util/cs-etm.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
> > index 110804936fc3..2257ac4dbff2 100644
> > --- a/tools/perf/util/cs-etm.c
> > +++ b/tools/perf/util/cs-etm.c
> > @@ -2023,5 +2023,5 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
> >  err_free_hdr:
> >  	zfree(&hdr);
> >  
> > -	return -EINVAL;
> > +	return err;
> >  }
> > -- 
> > 2.20.1
> > 
> > From 4ab1e71e45a91220bdca7fc3b79c600df81d9234 Mon Sep 17 00:00:00 2001
> > From: YueHaibing <yuehaibing@huawei.com>
> > Date: Fri, 15 Mar 2019 10:26:49 +0800
> > Subject: [PATCH 25/42] perf cs-etm: Remove errnoeous ERR_PTR() usage in in
> >  cs_etm__process_auxtrace_info
> > 
> > intlist__findnew() doesn't uses ERR_PTR() as a return mechanism so its callers
> > shouldn't try to extract the error using PTR_ERR(ret-from-intlist__findnew()),
> > make cs_etm__process_auxtrace_info9) return -ENOMEM instead.
> > 
> > Signed-off-by: YueHaibing <yuehaibing@huawei.com>
> > Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> > Cc: Jiri Olsa <jolsa@redhat.com>
> > Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> > Cc: Namhyung Kim <namhyung@kernel.org>
> > Cc: Peter Zijlstra <peterz@infradead.org>
> > Cc: Suzuki K Poulouse <suzuki.poulose@arm.com>
> > Cc: linux-arm-kernel@lists.infradead.org
> > Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
> > Link: http://lkml.kernel.org/r/20190315022649.17848-1-yuehaibing@huawei.com
> > [ split from a larger patch ]
> > Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
> > ---
> >  tools/perf/util/cs-etm.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
> > index 2257ac4dbff2..111f33cd1204 100644
> > --- a/tools/perf/util/cs-etm.c
> > +++ b/tools/perf/util/cs-etm.c
> > @@ -1908,7 +1908,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
> >  
> >  		/* Something went wrong, no need to continue */
> >  		if (!inode) {
> > -			err = PTR_ERR(inode);
> > +			err = -ENOMEM;
> >  			goto err_free_metadata;
> >  		}
> >  
> > -- 
> > 2.20.1
> > 

-- 

- Arnaldo