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(parent: 0f39b60) | patch
Btrfs: do not overwrite error return value in the device replace ioctl
authorFilipe Manana <fdmanana@suse.com>
Tue, 8 Jan 2019 11:42:09 +0000 (11:42 +0000)
committerDavid Sterba <dsterba@suse.com>
Mon, 25 Feb 2019 13:13:20 +0000 (14:13 +0100)
commitd3a53286c191c3d598eae09a68bb99a0db4e2466
tree865efa0570bd819dca70fb7119b96fde2781ed41tree | snapshot
parent0f39b6056323e3d5e82cdef0f811713fe05fbb12commit | diff
Btrfs: do not overwrite error return value in the device replace ioctl

If the call to btrfs_dev_replace_by_ioctl() failed we would overwrite the
error returned to user space with -EFAULT if the call to copy_to_user()
failed as well. Fix that by calling copy_to_user() only if no error
happened before or a device replace operation was canceled.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/ioctl.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git