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

[alexdeucher at gmail.com]

From: Alex Deucher <alexander.deucher at amd.com>

Bail if we hit the timeout limit.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/radeon/ni.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index 56afaff..722cfb3 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);
-- 
1.7.3.4