drm/radeon: fix semaphore value init

ChristianKoenigAMD · alexdeucher · commit f229407da793 · 2014-09-08T13:20:23.000-04:00
Semaphore values have 64 bits, not 32. This fixes a very subtle bug
that disables synchronization when the upper 32bits wasn't zero.

Signed-off-by: Christian König &lt;christian.koenig@amd.com&gt;
Cc: stable@vger.kernel.org
Reviewed-By: Grigori Goronzy &lt;greg@chown.ath.cx&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
diff --git a/drivers/gpu/drm/radeon/radeon_semaphore.c b/drivers/gpu/drm/radeon/radeon_semaphore.c
@@ -34,7 +34,7 @@
 int radeon_semaphore_create(struct radeon_device *rdev,
 			    struct radeon_semaphore **semaphore)
 {
-	uint32_t *cpu_addr;
+	uint64_t *cpu_addr;
 	int i, r;
 
 	*semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL);

Original file line number	Diff line number	Diff line change
`@@ -34,7 +34,7 @@`
`34`	`34`	`int radeon_semaphore_create(struct radeon_device *rdev,`
`35`	`35`	`struct radeon_semaphore **semaphore)`
`36`	`36`	`{`
`37`		`- uint32_t *cpu_addr;`
	`37`	`+ uint64_t *cpu_addr;`
`38`	`38`	`int i, r;`
`39`	`39`
`40`	`40`	`*semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL);`