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authorDan Williams <dan.j.williams@intel.com>2011-11-18 05:59:50 +0400
committerJames Bottomley <JBottomley@Parallels.com>2012-02-19 23:50:12 +0400
commit312d3e56119a4bc5c36a96818f87f650c069ddc2 (patch)
treed8cf7586656301ff1c4e5a49f9cbddde61e3e561 /drivers/scsi/libsas/sas_scsi_host.c
parentb1124cd3ec97406c767b90bf7e93ecd2d2915592 (diff)
downloadlinux-312d3e56119a4bc5c36a96818f87f650c069ddc2.tar.xz
[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/libsas/sas_scsi_host.c')
-rw-r--r--drivers/scsi/libsas/sas_scsi_host.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index 2a163c73fd8b..fd60465d4b2d 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -198,11 +198,9 @@ int sas_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
}
if (dev_is_sata(dev)) {
- unsigned long flags;
-
- spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
+ spin_lock_irq(dev->sata_dev.ap->lock);
res = ata_sas_queuecmd(cmd, dev->sata_dev.ap);
- spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags);
+ spin_unlock_irq(dev->sata_dev.ap->lock);
return res;
}