linux-kernel - Re: [Intel-gfx] [PATCH] drm/i915/pmu: fix noderef.cocci warnings

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Date:   Fri, 12 Jan 2018 14:28:01 +0000
From:   Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>
To:     kbuild test robot <fengguang.wu@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...el.com>
Cc:     dri-devel@...ts.freedesktop.org, David Airlie <airlied@...ux.ie>,
        intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kbuild-all@...org, Rodrigo Vivi <rodrigo.vivi@...el.com>
Subject: Re: [Intel-gfx] [PATCH] drm/i915/pmu: fix noderef.cocci warnings


On 12/01/2018 13:31, kbuild test robot wrote:
> From: Fengguang Wu <fengguang.wu@...el.com>
> 
> drivers/gpu/drm/i915/i915_pmu.c:795:34-40: ERROR: application of sizeof to pointer
> 
>   sizeof when applied to a pointer typed expression gives the size of
>   the pointer
> 
> Generated by: scripts/coccinelle/misc/noderef.cocci
> 
> Fixes: 109ec558370f ("drm/i915/pmu: Only enumerate available counters in sysfs")
> Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>
> ---
> 
>   i915_pmu.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- a/drivers/gpu/drm/i915/i915_pmu.c
> +++ b/drivers/gpu/drm/i915/i915_pmu.c
> @@ -792,7 +792,7 @@ create_event_attributes(struct drm_i915_
>   		goto err_alloc;
>   
>   	/* Max one pointer of each attribute type plus a termination entry. */
> -	attr = kzalloc((count * 2 + 1) * sizeof(attr), GFP_KERNEL);
> +	attr = kzalloc((count * 2 + 1) * sizeof(*attr), GFP_KERNEL);
>   	if (!attr)
>   		goto err_alloc;
>   

Luckily it is the same size so no actual bug, but fix is still valid. 
Will merge it once it passes CI, thanks!

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@...el.com>

Regards,

Tvrtko