linux-kernel - Re: [PATCH] drm/i915/gem: remove unused assignments

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Message-ID: <136dd37c-128a-714e-993f-65a119b7003b@linux.intel.com>
Date:   Wed, 22 Jun 2022 07:52:00 +0100
From:   Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>
To:     Katrin Jo <zys.zljxml@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        jani.nikula@...ux.intel.com, joonas.lahtinen@...ux.intel.com,
        rodrigo.vivi@...el.com, airlied@...ux.ie,
        Daniel Vetter <daniel@...ll.ch>, bob.beckett@...labora.com,
        matthew.auld@...el.com, thomas.hellstrom@...ux.intel.com,
        kernel@...labora.com, linux-kernel@...r.kernel.org,
        katrinzhou <katrinzhou@...cent.com>
Subject: Re: [PATCH] drm/i915/gem: remove unused assignments


On 21/06/2022 03:26, Katrin Jo wrote:
> On Mon, Jun 20, 2022 at 6:19 PM Tvrtko Ursulin
> <tvrtko.ursulin@...ux.intel.com> wrote:
>>
>>
>> On 20/06/2022 11:02, zys.zljxml@...il.com wrote:
>>> From: katrinzhou <katrinzhou@...cent.com>
>>>
>>> The variable ret is reassigned and the value EINVAL is never used.
>>> Thus, remove the unused assignments.
>>>
>>> Addresses-Coverity: ("Unused value")
>>> Fixes: d4433c7600f7 ("drm/i915/gem: Use the proto-context to handle create parameters (v5)")
>>> Signed-off-by: katrinzhou <katrinzhou@...cent.com>
>>> ---
>>>    drivers/gpu/drm/i915/gem/i915_gem_context.c | 2 --
>>>    1 file changed, 2 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
>>> index ab4c5ab28e4d..d5ef5243673a 100644
>>> --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
>>> +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
>>> @@ -931,8 +931,6 @@ static int set_proto_ctx_param(struct drm_i915_file_private *fpriv,
>>>                break;
>>>
>>>        case I915_CONTEXT_PARAM_PERSISTENCE:
>>> -             if (args->size)
>>> -                     ret = -EINVAL;
>>>                ret = proto_context_set_persistence(fpriv->dev_priv, pc,
>>>                                                    args->value);
>>
>> AFAICT fix should end up with code like this:
>>
>> if (args->size)
>>          ret = -EINVAL;
>> else
>>          ret = proto_context_set_persistence(...)
>> break;
>>
>>
>> Alternatively move args->size checking into
>> proto_context_set_persistence to align with set_persistence().
>>
>> Regards,
>>
>> Tvrtko
>>
>>>                break;
> 
> Thanks for reviewing! I sent the V2 patch, modified according to your
> suggestion.

I have merged the v2 to drm-intel-gt-next - thanks for the fix!

Regards,

Tvrtko