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Date: Fri, 19 Oct 2012 09:24:39 +0800 From: Joe Jin <joe.jin@...cle.com> To: Ron Mercer <ron.mercer@...gic.com>, Linux-Driver@...gic.com, Jitendra Kalsaria <jitendra.kalsaria@...gic.com>, Joe Jin <joe.jin@...cle.com> CC: netdev <netdev@...r.kernel.org>, linux-kernel@...r.kernel.org, Greg Marsden <greg.marsden@...cle.com> Subject: [PATCH] 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 <joe.jin@...cle.com> Cc: Jitendra Kalsaria <jitendra.kalsaria@...gic.com> Cc: Ron Mercer <ron.mercer@...gic.com> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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