xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[SCSI] hpsa: poll controller to detect device change event

Browse Source 
For shared SAS configurations, hosts need to poll Smart Arrays
periodically in order to be able to detect configuration changes
such as logical drives being added or removed from remote hosts.
A register on the controller indicates when such events have
occurred, and the driver polls the register via a workqueue
and kicks off a rescan of devices if such an event is detected.
Additionally, changes to logical drive raid offload eligibility
are autodetected in this way.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Scott Teel <scott.teel@hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Stephen M. Cameron
2014-02-18 13:55:43 -06:00
committed by James Bottomley
parent 250fb125ff
commit 76438d087f
3 changed files with 112 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/scsi/hpsa.h
View File

@@ -176,6 +176,7 @@ struct ctlr_info {
#define HPSATMF_LOG_QRY_TASK (1 << 23)
#define HPSATMF_LOG_QRY_TSET (1 << 24)
#define HPSATMF_LOG_QRY_ASYNC (1 << 25)
u32 events;
};
#define HPSA_ABORT_MSG 0
#define HPSA_DEVICE_RESET_MSG 1