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[SCSI] ibmvfc: Fix errors due to inconsistent command data 

In order to ensure the VIOS sees a consistent command buffer, we
need to add a memory barrier after building the command buffer
but before sending the command.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Brian King 2008-12-03 11:02:56 -06:00 committed by James Bottomley
parent 1c41fa8288
commit a528ab7a32
1 changed files with 2 additions and 0 deletions
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2
drivers/scsi/ibmvscsi/ibmvfc.c
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@ -1381,6 +1381,8 @@ static int ibmvfc_send_event(struct ibmvfc_event *evt,
add_timer(&evt->timer); add_timer(&evt->timer);
} }
mb();
if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) {
list_del(&evt->queue); list_del(&evt->queue);
del_timer(&evt->timer); del_timer(&evt->timer);