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| author | Andy Yan <ayan@marvell.com> | 2009-05-11 20:05:26 +0800 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2009-05-23 15:44:07 -0500 |
| commit | 0b84b7094e87769120def1e703b8b4d037281038 (patch) | |
| tree | 10ece1e9bb1653b56597b0dc4b39c4d2fe110dae /drivers/scsi/mvsas | |
| parent | 2b288133ab6306b1761e0a2ef943b944ead6ad69 (diff) | |
| download | linux-0b84b7094e87769120def1e703b8b4d037281038.tar.gz linux-0b84b7094e87769120def1e703b8b4d037281038.tar.bz2 linux-0b84b7094e87769120def1e703b8b4d037281038.zip | |
[SCSI] mvsas: bug fix of dead lock
TMF task should be issued with Interrupt Disabled, or Deadlock may take place.
Clean-up unused parameters and conditonal lock.
Signed-off-by: Ying Chu <jasonchu@marvell.com>
Signed-off-by: Andy Yan <ayan@marvell.com>
Signed-off-by: Ke Wei <kewei@marvell.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/mvsas')
| -rw-r--r-- | drivers/scsi/mvsas/mv_sas.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c index f709319c2b6d..4279b5e8808a 100644 --- a/drivers/scsi/mvsas/mv_sas.c +++ b/drivers/scsi/mvsas/mv_sas.c @@ -868,8 +868,8 @@ static int mvs_task_prep_ssp(struct mvs_info *mvi, #define DEV_IS_GONE(mvi_dev) ((!mvi_dev || (mvi_dev->dev_type == NO_DEVICE))) static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags, - struct completion *completion, int lock, - int is_tmf, struct mvs_tmf_task *tmf) + struct completion *completion,int is_tmf, + struct mvs_tmf_task *tmf) { struct domain_device *dev = task->dev; struct mvs_info *mvi; @@ -892,8 +892,7 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags, mvi = mvs_find_dev_mvi(task->dev); - if (lock) - spin_lock_irqsave(&mvi->lock, flags); + spin_lock_irqsave(&mvi->lock, flags); do { dev = t->dev; mvi_dev = (struct mvs_device *)dev->lldd_dev; @@ -1020,15 +1019,14 @@ out_done: MVS_CHIP_DISP->start_delivery(mvi, (mvi->tx_prod - 1) & (MVS_CHIP_SLOT_SZ - 1)); } - if (lock) - spin_unlock_irqrestore(&mvi->lock, flags); + spin_unlock_irqrestore(&mvi->lock, flags); return rc; } int mvs_queue_command(struct sas_task *task, const int num, gfp_t gfp_flags) { - return mvs_task_exec(task, num, gfp_flags, NULL, 1, 0, NULL); + return mvs_task_exec(task, num, gfp_flags, NULL, 0, NULL); } static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc) @@ -1448,7 +1446,7 @@ static int mvs_exec_internal_tmf_task(struct domain_device *dev, task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ; add_timer(&task->timer); - res = mvs_task_exec(task, 1, GFP_KERNEL, NULL, 0, 1, tmf); + res = mvs_task_exec(task, 1, GFP_KERNEL, NULL, 1, tmf); if (res) { del_timer(&task->timer); |