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mtd: blktrans: change blktrans_getgeo return value

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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 <wenlin.kang@windriver.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Wenlin Kang 2015-05-21 14:49:38 +08:00 • committed by Brian Norris
parent 8eeb4c521a
commit 5018393625
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/mtd_blkdevs.c
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@ -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);