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| author | Dan Williams <dan.j.williams@intel.com> | 2011-11-17 17:59:50 -0800 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-02-19 13:50:12 -0600 |
| commit | 312d3e56119a4bc5c36a96818f87f650c069ddc2 (patch) | |
| tree | d8cf7586656301ff1c4e5a49f9cbddde61e3e561 /drivers/scsi/mvsas | |
| parent | b1124cd3ec97406c767b90bf7e93ecd2d2915592 (diff) | |
| download | linux-312d3e56119a4bc5c36a96818f87f650c069ddc2.tar.gz linux-312d3e56119a4bc5c36a96818f87f650c069ddc2.tar.bz2 linux-312d3e56119a4bc5c36a96818f87f650c069ddc2.zip | |
[SCSI] libsas: remove ata_port.lock management duties from lldds
Each libsas driver (mvsas, pm8001, and isci) has invented a different
method for managing the ap->lock. The lock is held by the ata
->queuecommand() path. mvsas drops it prior to acquiring any internal
locks which allows it to hold its internal lock across calls to
task->task_done(). This capability is important as it is the only way
the driver can flush task->task_done() instances to guarantee that it no
longer has any in-flight references to a domain_device at
->lldd_dev_gone() time.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/mvsas')
| -rw-r--r-- | drivers/scsi/mvsas/mv_sas.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c index b118e632bc7d..cd882230591f 100644 --- a/drivers/scsi/mvsas/mv_sas.c +++ b/drivers/scsi/mvsas/mv_sas.c @@ -893,9 +893,6 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags, mvi = ((struct mvs_device *)task->dev->lldd_dev)->mvi_info; - if ((dev->dev_type == SATA_DEV) && (dev->sata_dev.ap != NULL)) - spin_unlock_irq(dev->sata_dev.ap->lock); - spin_lock_irqsave(&mvi->lock, flags); rc = mvs_task_prep(task, mvi, is_tmf, tmf, &pass); if (rc) @@ -906,9 +903,6 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags, (MVS_CHIP_SLOT_SZ - 1)); spin_unlock_irqrestore(&mvi->lock, flags); - if ((dev->dev_type == SATA_DEV) && (dev->sata_dev.ap != NULL)) - spin_lock_irq(dev->sata_dev.ap->lock); - return rc; } |