[PATCH] drm/i915/guc: remove redundant GEM_BUG_ON check

[PATCH] drm/i915/guc: remove redundant GEM_BUG_ON check

[Colin King]

From: Colin Ian King <colin.king@canonical.com>

The check for level being less than zero is redundant as level
is an unsigned u32 and hence will never be less than zero.
Remove this redundant check.

Detected by CoverityScan, CID#1468363 ("Macro compares unsigned to 0")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/gpu/drm/i915/intel_guc.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
index 116f4ccf1bbd..a2f782a4f97d 100644
--- a/drivers/gpu/drm/i915/intel_guc.c
+++ b/drivers/gpu/drm/i915/intel_guc.c
@@ -208,8 +208,6 @@ static u32 get_log_control_flags(void)
 	u32 level = i915_modparams.guc_log_level;
 	u32 flags = 0;
 
-	GEM_BUG_ON(level < 0);
-
 	if (!GUC_LOG_LEVEL_IS_ENABLED(level))
 		flags |= GUC_LOG_DEFAULT_DISABLED;
 
-- 
2.17.0

Re: [Intel-gfx] [PATCH] drm/i915/guc: remove redundant GEM_BUG_ON check

[Ville Syrjälä]

On Mon, Jun 11, 2018 at 05:00:37PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
> 
> The check for level being less than zero is redundant as level
> is an unsigned u32 and hence will never be less than zero.
> Remove this redundant check.
> 
> Detected by CoverityScan, CID#1468363 ("Macro compares unsigned to 0")
> 
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
>  drivers/gpu/drm/i915/intel_guc.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
> index 116f4ccf1bbd..a2f782a4f97d 100644
> --- a/drivers/gpu/drm/i915/intel_guc.c
> +++ b/drivers/gpu/drm/i915/intel_guc.c
> @@ -208,8 +208,6 @@ static u32 get_log_control_flags(void)
>  	u32 level = i915_modparams.guc_log_level;
>  	u32 flags = 0;
>  
> -	GEM_BUG_ON(level < 0);

i915_modparams.guc_log_level is a signed int. So s/u32/int would seem
like a better fix.

> -
>  	if (!GUC_LOG_LEVEL_IS_ENABLED(level))
>  		flags |= GUC_LOG_DEFAULT_DISABLED;
>  
> -- 
> 2.17.0
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Ville Syrjälä
Intel

Re: [Intel-gfx] [PATCH] drm/i915/guc: remove redundant GEM_BUG_ON check

[Colin Ian King]

On 11/06/18 17:25, Ville Syrjälä wrote:
> On Mon, Jun 11, 2018 at 05:00:37PM +0100, Colin King wrote:
>> From: Colin Ian King <colin.king@canonical.com>
>>
>> The check for level being less than zero is redundant as level
>> is an unsigned u32 and hence will never be less than zero.
>> Remove this redundant check.
>>
>> Detected by CoverityScan, CID#1468363 ("Macro compares unsigned to 0")
>>
>> Signed-off-by: Colin Ian King <colin.king@canonical.com>
>> ---
>>  drivers/gpu/drm/i915/intel_guc.c | 2 --
>>  1 file changed, 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
>> index 116f4ccf1bbd..a2f782a4f97d 100644
>> --- a/drivers/gpu/drm/i915/intel_guc.c
>> +++ b/drivers/gpu/drm/i915/intel_guc.c
>> @@ -208,8 +208,6 @@ static u32 get_log_control_flags(void)
>>  	u32 level = i915_modparams.guc_log_level;
>>  	u32 flags = 0;
>>  
>> -	GEM_BUG_ON(level < 0);
> 
> i915_modparams.guc_log_level is a signed int. So s/u32/int would seem
> like a better fix.

Good point, I somehow thought it  guc_loc_level was unsigned, but I was
wrong. Sending a V2.

> 
>> -
>>  	if (!GUC_LOG_LEVEL_IS_ENABLED(level))
>>  		flags |= GUC_LOG_DEFAULT_DISABLED;
>>  
>> -- 
>> 2.17.0
>>
>> _______________________________________________
>> Intel-gfx mailing list
>> Intel-gfx@lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
>