diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2011-11-18 05:59:49 +0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-02-19 23:41:04 +0400 |
| commit | b15ebe0b5d0b95aeb1d84cae3649df1e0e065e9b (patch) | |
| tree | ff93ad5f8be5fe91c7e6cf4963253491ddd058fb /drivers/scsi/libsas/sas_internal.h | |
| parent | 756f173fb5fa90ec15222e80fb579288be7794fd (diff) | |
| download | linux-b15ebe0b5d0b95aeb1d84cae3649df1e0e065e9b.tar.xz | |
[SCSI] libsas: replace event locks with atomic bitops
The locks only served to make sure the pending event bitmask was updated
consistently.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/libsas/sas_internal.h')
| -rw-r--r-- | drivers/scsi/libsas/sas_internal.h | 32 |
1 files changed, 7 insertions, 25 deletions
diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 0d43408196f9..7fe4eded2866 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -92,36 +92,18 @@ static inline int sas_smp_host_handler(struct Scsi_Host *shost, } #endif -static inline void sas_queue_event(int event, spinlock_t *lock, - unsigned long *pending, +static inline void sas_queue_event(int event, unsigned long *pending, struct work_struct *work, struct sas_ha_struct *sas_ha) { - unsigned long flags; + if (!test_and_set_bit(event, pending)) { + unsigned long flags; - spin_lock_irqsave(lock, flags); - if (test_bit(event, pending)) { - spin_unlock_irqrestore(lock, flags); - return; + spin_lock_irqsave(&sas_ha->state_lock, flags); + if (sas_ha->state != SAS_HA_UNREGISTERED) + scsi_queue_work(sas_ha->core.shost, work); + spin_unlock_irqrestore(&sas_ha->state_lock, flags); } - __set_bit(event, pending); - spin_unlock_irqrestore(lock, flags); - - spin_lock_irqsave(&sas_ha->state_lock, flags); - if (sas_ha->state != SAS_HA_UNREGISTERED) { - scsi_queue_work(sas_ha->core.shost, work); - } - spin_unlock_irqrestore(&sas_ha->state_lock, flags); -} - -static inline void sas_begin_event(int event, spinlock_t *lock, - unsigned long *pending) -{ - unsigned long flags; - - spin_lock_irqsave(lock, flags); - __clear_bit(event, pending); - spin_unlock_irqrestore(lock, flags); } static inline void sas_fill_in_rphy(struct domain_device *dev, |