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(parent: 6ae639c) | patch
um: fix ubd cow size
authorRichard Weinberger <richard@nod.at>
Wed, 2 Nov 2011 12:17:27 +0000 (13:17 +0100)
committerGreg Kroah-Hartman <gregkh@suse.de>
Mon, 7 Nov 2011 20:32:38 +0000 (12:32 -0800)
commit610fba92198e257bb039e49c391bb73cd0c1b2b1
tree4bddf6691d3715965a09c728ce1d5664021424bdtree | snapshot
parent6ae639c55f24aebe2b395b4fefb75064a59d6e3bcommit | diff
um: fix ubd cow size

commit 8535639810e578960233ad39def3ac2157b0c3ec upstream.

ubd_file_size() cannot use ubd_dev->cow.file because at this time
ubd_dev->cow.file is not initialized.
Therefore, ubd_file_size() will always report a wrong disk size when
COW files are used.
Reading from /dev/ubd* would crash the kernel.

We have to read the correct disk size from the COW file's backing
file.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
arch/um/drivers/ubd_kern.c diff | blob | history
Linux kernel for KaRo TX COM modules