From: Michael Chan <michael.chan@broadcom.com>
Date: Sun, 15 May 2016 07:04:51 +0000 (-0400)
Subject: bnxt_en: Use dma_rmb() instead of rmb().
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b67daab033293b3882ba4dc926ffb084d70044e0;p=linux-beck.git

bnxt_en: Use dma_rmb() instead of rmb().

Use the weaker but more appropriate dma_rmb() to order the reading of
the completion ring.

Suggested-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 9de1594be702..5a0dca3e6ef6 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1494,7 +1494,7 @@ static int bnxt_poll_work(struct bnxt *bp, struct bnxt_napi *bnapi, int budget)
 		/* The valid test of the entry must be done first before
 		 * reading any further.
 		 */
-		rmb();
+		dma_rmb();
 		if (TX_CMP_TYPE(txcmp) == CMP_TYPE_TX_L2_CMP) {
 			tx_pkts++;
 			/* return full budget so NAPI will complete. */