The patch below was submitted to be applied to the 3.12-stable tree.
I fail to see how this patch meets the stable kernel rules as found at
Documentation/stable_kernel_rules.txt.
I could be totally wrong, and if so, please respond to
<stable@xxxxxxxxxxxxxxx> and let me know why this patch should be
applied. Otherwise, it is now dropped from my patch queues, never to be
seen again.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 99b4f25122f43210278cde17a9d100906235a074 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@xxxxxxx>
Date: Tue, 12 Nov 2013 12:58:06 +0100
Subject: [PATCH] drm/radeon: disable CIK CP semaphores for now
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index 811fc1b5b4b9..c1698978a8f1 100644
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -3561,6 +3561,8 @@ bool cik_semaphore_ring_emit(struct radeon_device *rdev,
struct radeon_semaphore *semaphore,
bool emit_wait)
{
+/* TODO: figure out why semaphore cause lockups */
+#if 0
uint64_t addr = semaphore->gpu_addr;
unsigned sel = emit_wait ? PACKET3_SEM_SEL_WAIT : PACKET3_SEM_SEL_SIGNAL;
@@ -3569,6 +3571,9 @@ bool cik_semaphore_ring_emit(struct radeon_device *rdev,
radeon_ring_write(ring, (upper_32_bits(addr) & 0xffff) | sel);
return true;
+#else
+ return false;
+#endif
}
/**
--
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