mtip32xx: avoid using semaphores
The "cmd_slot_unal" semaphore is never used in a blocking way
but only as an atomic counter. Change the code to using
atomic_dec_if_positive() as a better API.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/drivers/block/mtip32xx/mtip32xx.h b/drivers/block/mtip32xx/mtip32xx.h
index c33f8c3..abce25f 100644
--- a/drivers/block/mtip32xx/mtip32xx.h
+++ b/drivers/block/mtip32xx/mtip32xx.h
@@ -433,8 +433,8 @@ struct mtip_port {
*/
unsigned long ic_pause_timer;
- /* Semaphore to control queue depth of unaligned IOs */
- struct semaphore cmd_slot_unal;
+ /* Counter to control queue depth of unaligned IOs */
+ atomic_t cmd_slot_unal;
/* Spinlock for working around command-issue bug. */
spinlock_t cmd_issue_lock[MTIP_MAX_SLOT_GROUPS];