linux-kernel - [PATCH 3/5] staging/slicoss: Fix operation may be undefined warning

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Message-Id: <1361247532-1874-3-git-send-email-peterhuewe@gmx.de>
Date:	Tue, 19 Feb 2013 05:18:50 +0100
From:	Peter Huewe <peterhuewe@....de>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Devendra Naga <devendra.aaru@...il.com>,
	Peter Huewe <peterhuewe@....de>,
	Bill Pemberton <wfp5p@...ginia.edu>,
	Cruz Julian Bishop <cruzjbishop@...il.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/5] staging/slicoss: Fix operation may be undefined warning

gcc complains about an undefined operation:
slicoss.c:1417:19: warning: operation on 'rspq->pageindex' may be
undefined [-Wsequence-point]

The intended operation was (probably) to retrieve the pageindex + 1 and let
it wrap around if it reaches the num_pages.

Signed-off-by: Peter Huewe <peterhuewe@....de>
---
 drivers/staging/slicoss/slicoss.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/slicoss/slicoss.c b/drivers/staging/slicoss/slicoss.c
index 048a341..fc08585 100644
--- a/drivers/staging/slicoss/slicoss.c
+++ b/drivers/staging/slicoss/slicoss.c
@@ -1414,7 +1414,7 @@ static struct slic_rspbuf *slic_rspqueue_getnext(struct adapter *adapter)
 		slic_reg64_write(adapter, &adapter->slic_regs->slic_rbar64,
 			(rspq->paddr[rspq->pageindex] | SLIC_RSPQ_BUFSINPAGE),
 			&adapter->slic_regs->slic_addr_upper, 0, DONT_FLUSH);
-		rspq->pageindex = (++rspq->pageindex) % rspq->num_pages;
+		rspq->pageindex = (rspq->pageindex + 1) % rspq->num_pages;
 		rspq->offset = 0;
 		rspq->rspbuf = (struct slic_rspbuf *)
 						rspq->vaddr[rspq->pageindex];
-- 
1.7.8.6

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