[PATCH v4 09/17] net: qla3xxx: Eliminate duplicate barriers on weakly-ordered archs

[Sinan Kaya]

Code includes wmb() followed by writel(). writel() already has a
barrier on some architectures like arm64.

This ends up CPU observing two barriers back to back before executing
the register write.

Since code already has an explicit barrier call, changing writel() to
writel_relaxed().

Signed-off-by: Sinan Kaya <ok...@codeaurora.org>
---
 drivers/net/ethernet/qlogic/qla3xxx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/qlogic/qla3xxx.c 
b/drivers/net/ethernet/qlogic/qla3xxx.c
index 9e5264d..0e71b74 100644
--- a/drivers/net/ethernet/qlogic/qla3xxx.c
+++ b/drivers/net/ethernet/qlogic/qla3xxx.c
@@ -1858,8 +1858,8 @@ static void ql_update_small_bufq_prod_index(struct 
ql3_adapter *qdev)
                        qdev->small_buf_release_cnt -= 8;
                }
                wmb();
-               writel(qdev->small_buf_q_producer_index,
-                       &port_regs->CommonRegs.rxSmallQProducerIndex);
+               writel_relaxed(qdev->small_buf_q_producer_index,
+                              &port_regs->CommonRegs.rxSmallQProducerIndex);
        }
 }
 
-- 
2.7.4