Stefan Weil 7a608f562e hw: Fix return value check for bdrv_read, bdrv_write
Those functions return -errno in case of an error.
The old code would typically only detect EPERM (1) errors.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
2012-10-05 13:54:35 +02:00
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