ubi: Fix error for write access

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commit 78a8dfbabb upstream.

When opening a device with write access, ubiblock_open returns an error
code. Currently, this error code is -EPERM, but this is not the right
value.

The open function for other block devices returns -EROFS when opening
read-only devices with FMODE_WRITE set. When used with dm-verity, the
veritysetup userspace tool is expecting EROFS, and refuses to use the
ubiblock device.

Use -EROFS for ubiblock as well. As a result, veritysetup accepts the
ubiblock device as valid.

Cc: stable@vger.kernel.org
Fixes: 9d54c8a33e (UBI: R/O block driver on top of UBI volumes)
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Romain Izard 2018-01-29 11:18:20 +01:00 • committed by Greg Kroah-Hartman

parent 3f2fdd3d4a

commit bd62cebba2

1 changed files with 1 additions and 1 deletions

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drivers/mtd/ubi/block.c

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