lkml.org 
[lkml]   [2018]   [Jun]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH][V2] drm/i915/guc: fix GEM_BUG_ON check
Date
On Tue, 12 Jun 2018, Dan Carpenter <dan.carpenter@oracle.com> wrote:
> On Mon, Jun 11, 2018 at 05:46:53PM +0100, Colin King wrote:
>> From: Colin Ian King <colin.king@canonical.com>
>>
>> The check for level being less than zero always false because flags
>> is currently unsigned and can never be negative. Fix this by making
>> flags a s32.
>>
>> Detected by CoverityScan, CID#1468363 ("Macro compares unsigned to 0")
>>
>> Signed-off-by: Colin Ian King <colin.king@canonical.com>
>>
>> ---
>> V2: Make flags s32 rather than remove the GEM_BUG_ON check, thanks to
>> Ville Syrjälä for spotting the mistake in my first attempt.
>> ---
>> drivers/gpu/drm/i915/intel_guc.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
>> index 116f4ccf1bbd..fb31f5004bcf 100644
>> --- a/drivers/gpu/drm/i915/intel_guc.c
>> +++ b/drivers/gpu/drm/i915/intel_guc.c
>> @@ -206,7 +206,7 @@ void intel_guc_fini(struct intel_guc *guc)
>> static u32 get_log_control_flags(void)
>> {
>> u32 level = i915_modparams.guc_log_level;
>> - u32 flags = 0;
>> + s32 flags = 0;
>>
>> GEM_BUG_ON(level < 0);
>
> Only insane people use "s32" when it's not part of the hardware spec and
> you changed the wrong variable...

Yeah, int level.

Also,

Fixes: cb5d64e9f13e ("drm/i915/guc: Allow user to control default GuC logging")

BR,
Jani.


>
> regards,
> dan carpenter
>

--
Jani Nikula, Intel Open Source Graphics Center

\
 
 \ /
  Last update: 2018-06-12 11:23    [W:0.038 / U:7.912 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site