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authorArnd Bergmann <arnd@arndb.de>2018-12-10 22:51:04 +0100
committerThierry Reding <treding@nvidia.com>2019-02-04 08:35:54 +0100
commit0747a672a32829809675028ba396f394b104ee31 (patch)
tree2b77877421b339cc552c12df7ae9ce23009bfead /drivers/gpu/host1x
parentdb5adf4d6dced4e3326ce369fe0c213c968095f4 (diff)
gpu: host1x: Use completion instead of semaphore
In this usage, the two are completely equivalent, but the completion documents better what is going on, and we generally try to avoid semaphores these days. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/host1x')
-rw-r--r--drivers/gpu/host1x/cdma.c6
-rw-r--r--drivers/gpu/host1x/cdma.h6
2 files changed, 6 insertions, 6 deletions
diff --git a/drivers/gpu/host1x/cdma.c b/drivers/gpu/host1x/cdma.c
index 91df51e631b2..15bdeb836e3d 100644
--- a/drivers/gpu/host1x/cdma.c
+++ b/drivers/gpu/host1x/cdma.c
@@ -210,7 +210,7 @@ unsigned int host1x_cdma_wait_locked(struct host1x_cdma *cdma,
cdma->event = event;
mutex_unlock(&cdma->lock);
- down(&cdma->sem);
+ wait_for_completion(&cdma->complete);
mutex_lock(&cdma->lock);
}
@@ -314,7 +314,7 @@ static void update_cdma_locked(struct host1x_cdma *cdma)
if (signal) {
cdma->event = CDMA_EVENT_NONE;
- up(&cdma->sem);
+ complete(&cdma->complete);
}
}
@@ -416,7 +416,7 @@ int host1x_cdma_init(struct host1x_cdma *cdma)
int err;
mutex_init(&cdma->lock);
- sema_init(&cdma->sem, 0);
+ init_completion(&cdma->complete);
INIT_LIST_HEAD(&cdma->sync_queue);
diff --git a/drivers/gpu/host1x/cdma.h b/drivers/gpu/host1x/cdma.h
index e97e17b82370..71078359c626 100644
--- a/drivers/gpu/host1x/cdma.h
+++ b/drivers/gpu/host1x/cdma.h
@@ -20,7 +20,7 @@
#define __HOST1X_CDMA_H
#include <linux/sched.h>
-#include <linux/semaphore.h>
+#include <linux/completion.h>
#include <linux/list.h>
struct host1x_syncpt;
@@ -69,8 +69,8 @@ enum cdma_event {
struct host1x_cdma {
struct mutex lock; /* controls access to shared state */
- struct semaphore sem; /* signalled when event occurs */
- enum cdma_event event; /* event that sem is waiting for */
+ struct completion complete; /* signalled when event occurs */
+ enum cdma_event event; /* event that complete is waiting for */
unsigned int slots_used; /* pb slots used in current submit */
unsigned int slots_free; /* pb slots free in current submit */
unsigned int first_get; /* DMAGET value, where submit begins */