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Commit 46721c3d authored by Denis Bolotin's avatar Denis Bolotin Committed by David S. Miller
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qed: Fix qed_ll2_post_rx_buffer_notify_fw() by adding a write memory barrier 



Make sure chain element is updated before ringing the doorbell.

Signed-off-by: default avatarDenis Bolotin <dbolotin@marvell.com>
Signed-off-by: default avatarAriel Elior <aelior@marvell.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2d533a92

drivers/net/ethernet/qlogic/qed/qed_ll2.c

+4 −0
Original line number Diff line number Diff line
@@ -1619,6 +1619,10 @@ static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn, 
	cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);

	rx_prod.bd_prod = cpu_to_le16(bd_prod);

	rx_prod.cqe_prod = cpu_to_le16(cq_prod);



	/* Make sure chain element is updated before ringing the doorbell */

	dma_wmb();



	DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));

}