From 0b84b7094e87769120def1e703b8b4d037281038 Mon Sep 17 00:00:00 2001 From: Andy Yan Date: Mon, 11 May 2009 20:05:26 +0800 Subject: [PATCH] [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 Signed-off-by: Andy Yan Signed-off-by: Ke Wei Signed-off-by: James Bottomley --- drivers/scsi/mvsas/mv_sas.c | 14 ++++++-------- 1 file 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); -- 2.20.1