linux-kernel - [PATCH] Avoid compiler warning by storing the result of rq_data

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Date:	Sun,  2 Aug 2015 22:49:41 -0700
From:	Tomer Barletz <barletz@...il.com>
To:	dwmw2@...radead.org, computersforpeace@...il.com
Cc:	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Tomer Barletz <barletz@...il.com>
Subject: [PATCH] Avoid compiler warning by storing the result of rq_data_dir() in an int variable

With gcc 5.1 I get:
warning: switch condition has boolean value [-Wswitch-bool]

Signed-off-by: Tomer Barletz <barletz@...il.com>
---
 drivers/mtd/mtd_blkdevs.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 41acc50..8830475 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -97,14 +97,13 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
 	if (req->cmd_flags & REQ_DISCARD)
 		return tr->discard(dev, block, nsect);
 
-	switch(rq_data_dir(req)) {
-	case READ:
+	if (rq_data_dir(req) == READ) {
 		for (; nsect > 0; nsect--, block++, buf += tr->blksize)
 			if (tr->readsect(dev, block, buf))
 				return -EIO;
 		rq_flush_dcache_pages(req);
 		return 0;
-	case WRITE:
+	} else {
 		if (!tr->writesect)
 			return -EIO;
 
@@ -113,9 +112,6 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
 			if (tr->writesect(dev, block, buf))
 				return -EIO;
 		return 0;
-	default:
-		printk(KERN_NOTICE "Unknown request %u\n", rq_data_dir(req));
-		return -EIO;
 	}
 }
 
-- 
2.4.3

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