Am 24.04.2017 um 10:38 schrieb Pan Bian:
From: Pan Bian <bianpan2...@163.com>
Function radeon_ring_lock() returns an errno on failure, and its return
value should be validated. However, in functions r420_cp_errata_init()
and r420_cp_errata_fini(), its return value is not checked. This patch
adds the checks.
Signed-off-by: Pan Bian <bianpan2...@163.com>
Reviewed-by: Christian König <christian.koe...@amd.com>
---
drivers/gpu/drm/radeon/r420.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/radeon/r420.c b/drivers/gpu/drm/radeon/r420.c
index 2828605..391c764 100644
--- a/drivers/gpu/drm/radeon/r420.c
+++ b/drivers/gpu/drm/radeon/r420.c
@@ -206,6 +206,7 @@ static void r420_clock_resume(struct radeon_device *rdev)
static void r420_cp_errata_init(struct radeon_device *rdev)
{
+ int r;
struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
/* RV410 and R420 can lock up if CP DMA to host memory happens
@@ -215,7 +216,8 @@ static void r420_cp_errata_init(struct radeon_device *rdev)
* of the CP init, apparently.
*/
radeon_scratch_get(rdev, &rdev->config.r300.resync_scratch);
- radeon_ring_lock(rdev, ring, 8);
+ r = radeon_ring_lock(rdev, ring, 8);
+ WARN_ON(r);
radeon_ring_write(ring, PACKET0(R300_CP_RESYNC_ADDR, 1));
radeon_ring_write(ring, rdev->config.r300.resync_scratch);
radeon_ring_write(ring, 0xDEADBEEF);
@@ -224,12 +226,14 @@ static void r420_cp_errata_init(struct radeon_device
*rdev)
static void r420_cp_errata_fini(struct radeon_device *rdev)
{
+ int r;
struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
/* Catch the RESYNC we dispatched all the way back,
* at the very beginning of the CP init.
*/
- radeon_ring_lock(rdev, ring, 8);
+ r = radeon_ring_lock(rdev, ring, 8);
+ WARN_ON(r);
radeon_ring_write(ring, PACKET0(R300_RB3D_DSTCACHE_CTLSTAT, 0));
radeon_ring_write(ring, R300_RB3D_DC_FINISH);
radeon_ring_unlock_commit(rdev, ring, false);
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