[PATCH] qla3xxx: Ensure request/response queue addr writes to the registers
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From: Joe Jin <hidden>
Date: 2012-10-19 01:22:41
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Subsystem:
networking drivers, qlogic qla3xxx network driver, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Before use the request and response queue addr, make sure it has wrote to the registers. Signed-off-by: Joe Jin <redacted> Cc: Jitendra Kalsaria <redacted> Cc: Ron Mercer <redacted> --- drivers/net/ethernet/qlogic/qla3xxx.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/qlogic/qla3xxx.c b/drivers/net/ethernet/qlogic/qla3xxx.c
index df09b1c..f745ade 100644
--- a/drivers/net/ethernet/qlogic/qla3xxx.c
+++ b/drivers/net/ethernet/qlogic/qla3xxx.c@@ -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,
--
1.7.11.7
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