From: Nathan Chancellor <nathan@kernel.org>
To: Jani Nikula <jani.nikula@linux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: "Jason Ekstrand" <jason@jlekstrand.net>,
"Thomas Hellström" <thomas.hellstrom@linux.intel.com>,
"Matthew Auld" <matthew.auld@intel.com>,
"Michael J. Ruhl" <michael.j.ruhl@intel.com>,
"Nick Desaulniers" <ndesaulniers@google.com>,
intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com,
llvm@lists.linux.dev, "Nathan Chancellor" <nathan@kernel.org>,
"Dan Carpenter" <dan.carpenter@oracle.com>
Subject: [PATCH 2/3] drm/i915/selftests: Always initialize err in igt_dmabuf_import_same_driver_lmem()
Date: Tue, 24 Aug 2021 15:54:26 -0700 [thread overview]
Message-ID: <20210824225427.2065517-3-nathan@kernel.org> (raw)
In-Reply-To: <20210824225427.2065517-1-nathan@kernel.org>
Clang warns:
drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c:127:13: warning:
variable 'err' is used uninitialized whenever 'if' condition is false
[-Wsometimes-uninitialized]
} else if (PTR_ERR(import) != -EOPNOTSUPP) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c:138:9: note:
uninitialized use occurs here
return err;
^~~
drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c:127:9: note: remove
the 'if' if its condition is always true
} else if (PTR_ERR(import) != -EOPNOTSUPP) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c:95:9: note:
initialize the variable 'err' to silence this warning
int err;
^
= 0
The test is expected to pass if i915_gem_prime_import() returns
-EOPNOTSUPP so initialize err to zero in this case.
Fixes: cdb35d1ed6d2 ("drm/i915/gem: Migrate to system at dma-buf attach time (v7)")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c
index 532c7955b300..4a6bb64c3a35 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c
@@ -128,6 +128,8 @@ static int igt_dmabuf_import_same_driver_lmem(void *arg)
pr_err("i915_gem_prime_import failed with the wrong err=%ld\n",
PTR_ERR(import));
err = PTR_ERR(import);
+ } else {
+ err = 0;
}
dma_buf_put(dmabuf);
--
2.33.0
next prev parent reply other threads:[~2021-08-24 22:54 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-24 22:54 [PATCH 0/3] drm/i915: Enable -Wsometimes-uninitialized Nathan Chancellor
2021-08-24 22:54 ` [PATCH 1/3] drm/i915/selftests: Do not use import_obj uninitialized Nathan Chancellor
2021-08-25 9:56 ` Thomas Hellström
2021-08-24 22:54 ` Nathan Chancellor [this message]
2021-08-25 9:57 ` [PATCH 2/3] drm/i915/selftests: Always initialize err in igt_dmabuf_import_same_driver_lmem() Thomas Hellström
2021-08-24 22:54 ` [PATCH 3/3] drm/i915: Enable -Wsometimes-uninitialized Nathan Chancellor
2021-09-14 15:17 ` Nick Desaulniers
2021-09-13 17:55 ` [PATCH 0/3] " Nathan Chancellor
2021-09-14 17:10 ` Jani Nikula
2021-09-14 19:53 ` Nathan Chancellor
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