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authorJason Yan <yanaijie@huawei.com>2017-12-08 17:42:07 +0800
committerMartin K. Petersen <martin.petersen@oracle.com>2018-01-08 21:59:28 -0500
commit93bdbd06b1644ac15aa152e91faefed86cc04937 (patch)
tree4f71a02f4e6c671716f68b4f267f0728a0f2ceb3 /include/scsi
parent8eea9dd84e450e5262643823691108f2a208a2ac (diff)
downloadlinux-93bdbd06b1644ac15aa152e91faefed86cc04937.tar.bz2
scsi: libsas: Use new workqueue to run sas event and disco event
Now all libsas works are queued to scsi host workqueue, include sas event work post by LLDD and sas discovery work, and a sas hotplug flow may be divided into several works, e.g libsas receive a PORTE_BYTES_DMAED event, currently we process it as following steps: sas_form_port --- run in work in shost workq sas_discover_domain --- run in another work in shost workq ... sas_probe_devices --- run in new work in shost workq We found during hot-add a device, libsas may need run several works in same workqueue to add device in system, the process is not atomic, it may interrupt by other sas event works, like PHYE_LOSS_OF_SIGNAL. This patch is preparation of execute libsas sas event in sync. We need to use different workqueue to run sas event and disco event. Otherwise the work will be blocked for waiting another chained work in the same workqueue. Signed-off-by: Yijing Wang <wangyijing@huawei.com> CC: John Garry <john.garry@huawei.com> CC: Johannes Thumshirn <jthumshirn@suse.de> CC: Ewan Milne <emilne@redhat.com> CC: Christoph Hellwig <hch@lst.de> CC: Tomas Henzl <thenzl@redhat.com> CC: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Jason Yan <yanaijie@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/libsas.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index 3769615d4ce9..6255bb5ed1e4 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -389,6 +389,9 @@ struct sas_ha_struct {
struct device *dev; /* should be set */
struct module *lldd_module; /* should be set */
+ struct workqueue_struct *event_q;
+ struct workqueue_struct *disco_q;
+
u8 *sas_addr; /* must be set */
u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];