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

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On 20/06/2022 11:02, zys.zljxml@xxxxxxxxx wrote:
From: katrinzhou <katrinzhou@xxxxxxxxxxx>

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@xxxxxxxxxxx>
---
  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;



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