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[SCSI] fusion - serialize target resets in mptsas.c

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Fusion firmware requires target reset following hotplug removal event,
with purpose to flush target outstanding request in fw. Current implementation
does the target resets from delayed work tasks, that in heavy load
conditions, take too long to be invoked, resulting in command time outs
This patch will issue target reset immediately from ISR context, and will
queue remaining target resets to be issued after the previous one completes.
The delayed work tasks are spawned during the target reset completion.

Signed-off-by: Eric Moore <Eric.Moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Eric Moore
2007-01-29 09:46:21 -07:00
committed by James Bottomley
parent b506ade9f3
commit df9e062ad9
2 changed files with 282 additions and 46 deletions
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1
drivers/message/fusion/mptbase.h
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@@ -994,6 +994,7 @@ typedef struct _MPT_SCSI_HOST {
int scandv_wait_done;
long last_queue_full;
u16 tm_iocstatus;
struct list_head target_reset_list;
} MPT_SCSI_HOST;
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/