Re: [PATCH 1/1] drm/msm: fix %s null argument error

[Sherry Yang <sherry.yang@oracle.com>]

> On Aug 27, 2024, at 10:50 AM, Abhinav Kumar <quic_abhinavk@quicinc.com> wrote:
> 
> 
> 
> On 8/27/2024 9:53 AM, Sherry Yang wrote:
>> The following build error was triggered because of NULL string argument:
>> BUILDSTDERR: drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c: In function 'mdp5_smp_dump':
>> BUILDSTDERR: drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c:352:51: error: '%s' directive argument is null [-Werror=format-overflow=]
>> BUILDSTDERR:   352 |                         drm_printf(p, "%s:%d\t%d\t%s\n",
>> BUILDSTDERR:       |                                                   ^~
>> BUILDSTDERR: drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c:352:51: error: '%s' directive argument is null [-Werror=format-overflow=]
>> This happens from the commit a61ddb4393ad ("drm: enable (most) W=1
>> warnings by default across the subsystem"). Using "(null)" instead
>> to fix it.
>> Fixes: bc5289eed481 ("drm/msm/mdp5: add debugfs to show smp block status")
>> Signed-off-by: Sherry Yang <sherry.yang@oracle.com>
>> ---
>>  drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> I am not sure how the patch got titled 1/1 and not just "PATCH". It should be just "PATCH"

My bad. I generated the patch with parameter “--numbered” in “git format-patch”, it will output in [PATCH n/m] format, even with a single patch. Will drop it for single patch next time.

Thanks,
Sherry

> 
>> diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c
>> index 3a7f7edda96b..500b7dc895d0 100644
>> --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c
>> +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c
>> @@ -351,7 +351,7 @@ void mdp5_smp_dump(struct mdp5_smp *smp, struct drm_printer *p,
>>     drm_printf(p, "%s:%d\t%d\t%s\n",
>>   pipe2name(pipe), j, inuse,
>> - plane ? plane->name : NULL);
>> + plane ? plane->name : "(null)");
>>     total += inuse;
>>   }
> 
> Change itself looks fine to me,
> 
> 
> Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>