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[SCSI] mpt2sas: RESCAN Barrier work is added in case of HBA reset.

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Add the cancel_pending_work flag from the fw_event_work structure, and then to
set the flag during host reset, check the flag later from work threads
context and if cancel_pending_work_flag is set ingore those events.

Now Rescan after host reset is changed.
Added special task MPT2SAS_RESCAN_AFTER_HOST_RESET. This task will be queued
at the time of HBA reset. this task is treated as barrier. All work after
MPT2SAS_RESCAN_AFTER_HOST_RESET will be treated as new work and will be
server by callback handle. If host_recovery is going on while running RESCAN
task, it will wait for shos_recovery_done completion which will be called
from HBA reset DONE context.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Reviewed-by: Eric Moore <eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Kashyap, Desai
2010-03-09 16:31:43 +05:30
committed by James Bottomley
parent 36dd288f0f
commit f1c35e6aea
3 changed files with 90 additions and 80 deletions
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3
drivers/scsi/mpt2sas/mpt2sas_base.h
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@ -119,7 +119,6 @@
#define MPT2_IOC_PRE_RESET 1 /* prior to host reset */
#define MPT2_IOC_AFTER_RESET 2 /* just after host reset */
#define MPT2_IOC_DONE_RESET 3 /* links re-initialized */
#define MPT2_IOC_RUNNING 4 /* shost running */
/*
* logging format
@ -603,7 +602,6 @@ struct MPT2SAS_ADAPTER {
/* fw event handler */
char firmware_event_name[20];
struct workqueue_struct *firmware_event_thread;
u8 fw_events_off;
spinlock_t fw_event_lock;
struct list_head fw_event_list;
@ -611,6 +609,7 @@ struct MPT2SAS_ADAPTER {
int aen_event_read_flag;
u8 broadcast_aen_busy;
u8 shost_recovery;
struct completion shost_recovery_done;
spinlock_t ioc_reset_in_progress_lock;
u8 ioc_link_reset_in_progress;
u8 ignore_loginfos;