[PATCH] mptbase: Reset ioc initiator after PCI resume

["Darrick J. Wong" <djwong@us.ibm.com>]

It appears that the LSI SAS 1064E chip needs to be reset after a
suspend/resume cycle before the driver attempts further communications with
the chip.  This patch gets rid of these error messages:

mptbase: ioc0: ERROR - Invalid IOC facts reply, msgLength=0 offsetof=6!

after a system wakes up from sleep.  I've also tested it on a 53c1030 chip
with no observable regressions.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
---

 drivers/message/fusion/mptbase.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index b3f28a0..b228e4c 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -1545,6 +1545,12 @@ mpt_resume(struct pci_dev *pdev)
 		(mpt_GetIocState(ioc, 1) >> MPI_IOC_STATE_SHIFT),
 		CHIPREG_READ32(&ioc->chip->Doorbell));
 
+	/* put ioc into READY_STATE */
+	if(SendIocReset(ioc, MPI_FUNCTION_IOC_MESSAGE_UNIT_RESET, CAN_SLEEP)) {
+		printk(MYIOC_s_ERR_FMT
+		"pci-resume:  IOC msg unit reset failed!\n", ioc->name);
+	}
+
 	/* bring ioc to operational state */
 	if ((recovery_state = mpt_do_ioc_recovery(ioc,
 	    MPT_HOSTEVENT_IOC_RECOVER, CAN_SLEEP)) != 0) {