diff options
| author | Brian King <brking@linux.vnet.ibm.com> | 2010-06-17 13:55:13 -0500 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-07-27 12:02:39 -0500 |
| commit | 73ee5d8672871bd69077ca71e7208a36bfa6343c (patch) | |
| tree | 6494ae5426a54a98ad5f8f6aec4ba58e41003fc4 /drivers/scsi/ibmvscsi/ibmvfc.h | |
| parent | 15f7fc060a7bf49991c35b23e1e7d73a1535382a (diff) | |
[SCSI] ibmvfc: Fix soft lockup on resume
This fixes a softlockup seen on resume. During resume, the CRQ
must be reenabled. However, the H_ENABLE_CRQ hcall used to do
this may return H_BUSY or H_LONG_BUSY. When this happens, the
caller is expected to retry later. Normally the H_ENABLE_CRQ
succeeds relatively soon. However, we have seen cases where
this can take long enough to see softlockup warnings.
This patch changes a simple loop, which was causing the
softlockup, to a loop at task level which sleeps between
retries rather than simply spinning.
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/ibmvscsi/ibmvfc.h')
| -rw-r--r-- | drivers/scsi/ibmvscsi/ibmvfc.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h index 7e9742764e4..2010d73aca8 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.h +++ b/drivers/scsi/ibmvscsi/ibmvfc.h @@ -649,6 +649,8 @@ struct ibmvfc_event_pool { enum ibmvfc_host_action { IBMVFC_HOST_ACTION_NONE = 0, + IBMVFC_HOST_ACTION_RESET, + IBMVFC_HOST_ACTION_REENABLE, IBMVFC_HOST_ACTION_LOGO, IBMVFC_HOST_ACTION_LOGO_WAIT, IBMVFC_HOST_ACTION_INIT, |