[Intel-gfx] [PATCH] drm/i915: The timeout for wait_timeout_ioctl is only valid upon success

[Chris Wilson]

As we only update and sanitize the return timeout value after a
successful wait, we should not assert that it is valid for any error
returns. Also, for consistency, we should only modify args->timeout_ns
upon success.

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Ben Widawsky <ben at bwidawsk.net>
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 63c05dd..da78cf7 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2377,7 +2377,7 @@ i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 	mutex_unlock(&dev->struct_mutex);
 
 	ret = __wait_seqno(ring, seqno, reset_counter, true, timeout);
-	if (timeout) {
+	if (ret == 0 && timeout) {
 		WARN_ON(!timespec_valid(timeout));
 		args->timeout_ns = timespec_to_ns(timeout);
 	}
-- 
1.7.10.4