diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2018-12-10 22:34:39 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-12-10 14:44:56 -0700 |
| commit | e4025e46f093d4549d3043c2c54d444cec480d2b (patch) | |
| tree | d96d7141ef0bdcc4147fb55530b2d9857f7a93a7 /drivers/block/mtip32xx/mtip32xx.h | |
| parent | 6f75723190d88e1319bea623bfe0292bf3917965 (diff) | |
| download | linux-e4025e46f093d4549d3043c2c54d444cec480d2b.tar.bz2 | |
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>
Diffstat (limited to 'drivers/block/mtip32xx/mtip32xx.h')
| -rw-r--r-- | drivers/block/mtip32xx/mtip32xx.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.h b/drivers/block/mtip32xx/mtip32xx.h index c33f8c3d9fb4..abce25f27f57 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]; |