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qla3xxx: Ensure request/response queue addr writes to the registers

PATCH New Joe Jin 1 participant 1 message Oct 19, 2012

Subsystems (3)
Networking Network drivers QLogic QLA3XXX network driver
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Joe Jin

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PATCH 1/1 qla3xxx: Ensure request/response queue addr writes to the registers

Before use the request and response queue addr, make sure it has wrote to the registers.

Signed-off-by Joe Jin <[email protected]>
Cc Jitendra Kalsaria <[email protected]>
Cc Ron Mercer <[email protected]>
---
 drivers/net/ethernet/qlogic/qla3xxx.c | 6 ++++++
 1 file changed, 6 insertions(+)
drivers/net/ethernet/qlogic/qla3xxx.c +6 -0
index df09b1c..f745ade 100644
@@ -2525,6 +2525,12 @@ static int ql_alloc_net_req_rsp_queues(struct ql3_adapter *qdev)
 	qdev->req_q_size =
 	    (u32) (NUM_REQ_Q_ENTRIES * sizeof(struct ob_mac_iocb_req));
 
+	/*
+	 * The barrier is required to ensure request and response queue
+	 * addr writes to the registers.
+	 */
+	wmb();
+
 	qdev->req_q_virt_addr =
 	    pci_alloc_consistent(qdev->pdev,
 				 (size_t) qdev->req_q_size,
Signature · 1 line
1.7.11.7