[PATCH] __copy_to_user() check in cdrom_read_cdda_old()
akpm: really, reads are supposed to return the number-of-bytes-read on faults, or -EFAULT of no bytes were read. This patch returns either zero or -EFAULT, ignoring any successfully transferred data. But the user interface (whcih is an ioctl()) was never set up to do that. Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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