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[SCSI] bfa: kdump fix

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Root cause: When kernel crashes, bfa IOC state machine and FW doesn't get
a notification and hence are not cleanly shutdown. So registers holding
driver/IOC state information are not reset back to valid disabled/parking
values. This causes subsequent driver initialization to hang during kdump
kernel boot.

Fix description: during the initialization of first PCI function, reset
corresponding register when unclean shutown is detect by reading chip
registers. This will make sure that ioc/fw gets clean re-initialization.

Signed-off-by: Jing Huang <huangj@brocade.com>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
This commit is contained in:
Jing Huang
2011-04-13 11:45:53 -07:00
committed by James Bottomley
parent a5442ba4a4
commit 45d7f0cc58
4 changed files with 41 additions and 1 deletions
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11
drivers/scsi/bfa/bfa_ioc_cb.c
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@@ -32,6 +32,7 @@ static void bfa_ioc_cb_map_port(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix);
static void bfa_ioc_cb_notify_fail(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_ownership_reset(struct bfa_ioc_s *ioc);
static bfa_boolean_t bfa_ioc_cb_sync_start(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_sync_join(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_sync_leave(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_sync_ack(struct bfa_ioc_s *ioc);
@@ -53,6 +54,7 @@ bfa_ioc_set_cb_hwif(struct bfa_ioc_s *ioc)
hwif_cb.ioc_isr_mode_set = bfa_ioc_cb_isr_mode_set;
hwif_cb.ioc_notify_fail = bfa_ioc_cb_notify_fail;
hwif_cb.ioc_ownership_reset = bfa_ioc_cb_ownership_reset;
hwif_cb.ioc_sync_start = bfa_ioc_cb_sync_start;
hwif_cb.ioc_sync_join = bfa_ioc_cb_sync_join;
hwif_cb.ioc_sync_leave = bfa_ioc_cb_sync_leave;
hwif_cb.ioc_sync_ack = bfa_ioc_cb_sync_ack;
@@ -194,6 +196,15 @@ bfa_ioc_cb_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix)
{
}
/*
* Synchronized IOC failure processing routines
*/
static bfa_boolean_t
bfa_ioc_cb_sync_start(struct bfa_ioc_s *ioc)
{
return bfa_ioc_cb_sync_complete(ioc);
}
/*
* Cleanup hw semaphore and usecnt registers
*/