drm/radeon/kms: don't poll forever if MC GDDR link training fails

Bail if we hit the timeout limit.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index 56afaff6299a..722cfb398992 100644
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -261,8 +261,11 @@ int ni_mc_load_microcode(struct radeon_device *rdev)
                 WREG32(MC_SEQ_SUP_CNTL, 0x00000001);
 
                 /* wait for training to complete */
-                while (!(RREG32(MC_IO_PAD_CNTL_D0) & MEM_FALL_OUT_CMD))
-                        udelay(10);
+                for (i = 0; i < rdev->usec_timeout; i++) {
+                        if (RREG32(MC_IO_PAD_CNTL_D0) & MEM_FALL_OUT_CMD)
+                                break;
+                        udelay(1);
+                }
 
                 if (running)
                         WREG32(MC_SHARED_BLACKOUT_CNTL, blackout);