[PATCH] ISDN: correctly handle isdn_writebuf_stub() errors
isdn_writebuf_stub() forgets to detect memory allocation and uaccess errors. And when that's fixed, if a error happens the caller will just keep on looping. So change the caller to detect the error, and to return it. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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