From 50183936254b76997d222cd36bac997ebf8115de Mon Sep 17 00:00:00 2001 From: Wenlin Kang Date: Thu, 21 May 2015 14:49:38 +0800 Subject: [PATCH] mtd: blktrans: change blktrans_getgeo return value Modify function blktrans_getgeo()'s return value to -EOPNOTSUPP when dev->tr->getgeo == NULL. We shouldn't make the return value to 0 when dev->tr->getgeo == NULL, because the function blktrans_getgeo() has an output value "hd_geometry" which is usually used by some application, if returns 0 (i.e., "success"), it will make some application get the wrong information. Signed-off-by: Wenlin Kang Signed-off-by: Brian Norris --- drivers/mtd/mtd_blkdevs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index df7c6c70757a..c545c9325acf 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -278,7 +278,7 @@ static int blktrans_getgeo(struct block_device *bdev, struct hd_geometry *geo) if (!dev->mtd) goto unlock; - ret = dev->tr->getgeo ? dev->tr->getgeo(dev, geo) : 0; + ret = dev->tr->getgeo ? dev->tr->getgeo(dev, geo) : -EOPNOTSUPP; unlock: mutex_unlock(&dev->lock); blktrans_dev_put(dev); -- 2.20.1