linux-kernel - [PATCH] drm/i915/userptr: remove redundation assignment to variable ret

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Message-Id: <20220730122342.146475-1-colin.i.king@gmail.com>
Date:   Sat, 30 Jul 2022 13:23:42 +0100
From:   Colin Ian King <colin.i.king@...il.com>
To:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        David Airlie <airlied@...ux.ie>,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/i915/userptr: remove redundation assignment to variable ret

Variable ret is assigned a value that is never read; it is either
being re-assigned during the following while-loop or after the loop.
The assignmnt is redundant and can be removed.

Cleans up clang scan build warning:
drivers/gpu/drm/i915/gem/i915_gem_userptr.c:295:11: warning: Although
the value stored to 'ret' is used in the enclosing expression, the
value is never actually read from 'ret' [deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@...il.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_userptr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
index 8423df021b71..075aef875a07 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
@@ -292,7 +292,7 @@ int i915_gem_object_userptr_submit_init(struct drm_i915_gem_object *obj)
 	if (!i915_gem_object_is_readonly(obj))
 		gup_flags |= FOLL_WRITE;
 
-	pinned = ret = 0;
+	pinned = 0;
 	while (pinned < num_pages) {
 		ret = pin_user_pages_fast(obj->userptr.ptr + pinned * PAGE_SIZE,
 					  num_pages - pinned, gup_flags,
-- 
2.35.3