From: Wenlin Kang Date: Thu, 21 May 2015 06:49:38 +0000 (+0800) Subject: mtd: blktrans: change blktrans_getgeo return value X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=50183936254b;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 --- 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);