MBCS: convert dmawritelock to mutex

MBCS: Convert the semaphore dmawritelock to the mutex API

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/char/mbcs.c b/drivers/char/mbcs.c
index 035575c..7321c14 100644 (file)
--- a/drivers/char/mbcs.c
+++ b/drivers/char/mbcs.c
@@ -310,7 +310,7 @@ do_mbcs_sram_dmawrite(struct mbcs_soft *soft, uint64_t hostAddr,
 {
        int rv = 0;
 
-       if (down_interruptible(&soft->dmawritelock))
+       if (mutex_lock_interruptible(&soft->dmawritelock))
                return -ERESTARTSYS;
 
        atomic_set(&soft->dmawrite_done, 0);
@@ -336,7 +336,7 @@ do_mbcs_sram_dmawrite(struct mbcs_soft *soft, uint64_t hostAddr,
        *off += len;
 
 dmawrite_exit:
-       up(&soft->dmawritelock);
+       mutex_unlock(&soft->dmawritelock);
 
        return rv;
 }
@@ -763,7 +763,7 @@ static int mbcs_probe(struct cx_dev *dev, const struct cx_device_id *id)
        init_waitqueue_head(&soft->dmaread_queue);
        init_waitqueue_head(&soft->algo_queue);
 
-       init_MUTEX(&soft->dmawritelock);
+       mutex_init(&soft->dmawritelock);
        init_MUTEX(&soft->dmareadlock);
        mutex_init(&soft->algolock);
 

diff --git a/drivers/char/mbcs.h b/drivers/char/mbcs.h
index d4d97ab..b054351 100644 (file)
--- a/drivers/char/mbcs.h
+++ b/drivers/char/mbcs.h
@@ -537,7 +537,7 @@ struct mbcs_soft {
        atomic_t dmawrite_done;
        atomic_t dmaread_done;
        atomic_t algo_done;
-       struct semaphore dmawritelock;
+       struct mutex dmawritelock;
        struct semaphore dmareadlock;
        struct mutex algolock;
 };