From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Carpenter Subject: [patch -mainline] amd-xgbe: fix a couple timeout loops Date: Tue, 15 Dec 2015 13:12:29 +0300 Message-ID: <20151215101229.GF20848@mwanda> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@vger.kernel.org, kernel-janitors@vger.kernel.org To: Tom Lendacky Return-path: Received: from userp1040.oracle.com ([156.151.31.81]:49175 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964822AbbLOKMi (ORCPT ); Tue, 15 Dec 2015 05:12:38 -0500 Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: At the end of the loop we test "if (!count)" but because "count--" is a post-op then the loop will end with count set to -1. I have fixed this by changing it to --count. Fixes: c5aa9e3b8156 ('amd-xgbe: Initial AMD 10GbE platform driver') Signed-off-by: Dan Carpenter diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c index 970781a..f6a7161 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c @@ -1849,7 +1849,7 @@ static int xgbe_exit(struct xgbe_prv_data *pdata) usleep_range(10, 15); /* Poll Until Poll Condition */ - while (count-- && XGMAC_IOREAD_BITS(pdata, DMA_MR, SWR)) + while (--count && XGMAC_IOREAD_BITS(pdata, DMA_MR, SWR)) usleep_range(500, 600); if (!count) @@ -1873,7 +1873,7 @@ static int xgbe_flush_tx_queues(struct xgbe_prv_data *pdata) /* Poll Until Poll Condition */ for (i = 0; i < pdata->tx_q_count; i++) { count = 2000; - while (count-- && XGMAC_MTL_IOREAD_BITS(pdata, i, + while (--count && XGMAC_MTL_IOREAD_BITS(pdata, i, MTL_Q_TQOMR, FTQ)) usleep_range(500, 600);