On 13/03/2017 12:47, Chris Wilson wrote:
The patch 791ff39ae32a: "drm/i915: Live testing for context
execution" from Feb 13, 2017, leads to the following static checker
warning:

        drivers/gpu/drm/i915/selftests/i915_gem_context.c:347 igt_ctx_exec()
        error: 'file' dereferencing possible ERR_PTR()

Reported-by: Dan Carpenter <dan.carpen...@oracle.com>
Fixes: 791ff39ae32a ("drm/i915: Live testing for context execution")
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
Cc: Matthew Auld <matthew.a...@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
Cc: Mika Kuoppala <mika.kuopp...@intel.com>
Cc: <drm-intel-fi...@lists.freedesktop.org>
---
 drivers/gpu/drm/i915/selftests/i915_gem_context.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_context.c 
b/drivers/gpu/drm/i915/selftests/i915_gem_context.c
index 3813a19a6179..1afb8b06e3e1 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_context.c
@@ -320,8 +320,8 @@ static unsigned long max_dwords(struct drm_i915_gem_object 
*obj)
 static int igt_ctx_exec(void *arg)
 {
        struct drm_i915_private *i915 = arg;
-       struct drm_file *file = mock_file(i915);
        struct drm_i915_gem_object *obj;
+       struct drm_file *file;
        IGT_TIMEOUT(end_time);
        LIST_HEAD(objects);
        unsigned long ncontexts, ndwords, dw;
@@ -333,6 +333,10 @@ static int igt_ctx_exec(void *arg)
         * up in the expected pages of our obj.
         */

+       file = mock_file(i915);
+       if (IS_ERR(file))
+               return PTR_ERR(file);
+
        mutex_lock(&i915->drm.struct_mutex);

        ncontexts = 0;


Reviewed-by: Tvrtko Ursulin <tvrtko.ursu...@intel.com>

Regards,

Tvrtko
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