[PATCH] drm/i915: Fix error pointer dereference in i915_gem_do_execbuffer()

[Dan Carpenter]

Originally "out_fence" was set using out_fence = sync_file_create() but
which returns NULL, but now it is set with out_fence = eb_requests_create()
which returns error pointers.  The error path needs to be modified to
avoid an Oops in the "goto err_request;" path.

Fixes: 544460c33821 ("drm/i915: Multi-BB execbuf")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c 
b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 4d7da07442f2..9b24d9b5ade1 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -3277,6 +3277,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
        out_fence = eb_requests_create(&eb, in_fence, out_fence_fd);
        if (IS_ERR(out_fence)) {
                err = PTR_ERR(out_fence);
+               out_fence = NULL;
                if (eb.requests[0])
                        goto err_request;
                else
-- 
2.20.1