diff options
| 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/scsi_transport_sas.c | |
| parent | [SCSI] libsas: introduce sas_drain_work() (diff) | |
| download | linux-dev-312d3e56119a4bc5c36a96818f87f650c069ddc2.tar.xz linux-dev-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/scsi_transport_sas.c')
0 files changed, 0 insertions, 0 deletions