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[3/9] qla2xxx: Add flush after updating ATIOQ consumer index.

Message ID 1433948725-4073-4-git-send-email-himanshu.madhani@qlogic.com (mailing list archive)
State New, archived
Headers show

Commit Message

Himanshu Madhani June 10, 2015, 3:05 p.m. UTC 
From: Quinn Tran <quinn.tran@qlogic.com>

After updating the consumer index of ATIO Q, a read is
required to flush the write to the adapter register.

Signed-off-by: Quinn Tran <quinn.tran@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
---
 drivers/scsi/qla2xxx/qla_target.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
diff mbox

Patch

diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index c70754b..1f9a41a 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -5550,6 +5550,7 @@  qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
 
 	/* Adjust ring index */
 	WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
+	RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
 }
 
 void