linux-kernel - [PATCH 62/83] hsa/radeon: Fix timeout calculation in sync_with

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Date:	Fri, 11 Jul 2014 00:54:18 +0300
From:	Oded Gabbay <oded.gabbay@...il.com>
To:	David Airlie <airlied@...ux.ie>,
	Alex Deucher <alexander.deucher@....com>,
	Jerome Glisse <j.glisse@...il.com>
Cc:	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	John Bridgman <John.Bridgman@....com>,
	Andrew Lewycky <Andrew.Lewycky@....com>,
	Joerg Roedel <joro@...tes.org>,
	Oded Gabbay <oded.gabbay@....com>
Subject: [PATCH 62/83] hsa/radeon: Fix timeout calculation in sync_with_hw

This patch fixes a bug in the timeout calculation done in sync_with_hw
functions. The original code assumed that jiffies is incremented in ms.

Signed-off-by: Oded Gabbay <oded.gabbay@....com>
---
 drivers/gpu/hsa/radeon/kfd_kernel_queue.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/hsa/radeon/kfd_kernel_queue.c b/drivers/gpu/hsa/radeon/kfd_kernel_queue.c
index 25528b3..ce3261b 100644
--- a/drivers/gpu/hsa/radeon/kfd_kernel_queue.c
+++ b/drivers/gpu/hsa/radeon/kfd_kernel_queue.c
@@ -222,12 +222,18 @@ static void submit_packet(struct kernel_queue *kq)
 
 static int sync_with_hw(struct kernel_queue *kq, unsigned long timeout_ms)
 {
+	unsigned long org_timeout_ms;
+
 	BUG_ON(!kq);
-	timeout_ms += jiffies;
+
+	org_timeout_ms = timeout_ms;
+	timeout_ms += jiffies * 1000 / HZ;
 	while (*kq->wptr_kernel != *kq->rptr_kernel) {
-		if (time_after(jiffies, timeout_ms)) {
-			pr_err("kfd: kernel_queue %s timeout expired %lu\n", __func__, timeout_ms);
-			pr_err("kfd: wptr: %d rptr: %d\n", *kq->wptr_kernel, *kq->rptr_kernel);
+		if (time_after(jiffies * 1000 / HZ, timeout_ms)) {
+			pr_err("kfd: kernel_queue %s timeout expired %lu\n",
+				__func__, org_timeout_ms);
+			pr_err("kfd: wptr: %d rptr: %d\n",
+				*kq->wptr_kernel, *kq->rptr_kernel);
 			return -ETIME;
 		}
 		cpu_relax();
-- 
1.9.1

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