Commit cbc31a47 authored Apr 25, 2007 by Andrew Morton Committed by Linus Torvalds Apr 25, 2007

packet: fix error handling



The packet driver is assuming (reasonably) that the (undocumented)
request.errors is an errno.  But it is in fact some mysterious bitfield.  When
things go wrong we return weird positive numbers to the VFS as pointers and it
goes oops.

Thanks to William Heimbigner for reporting and diagnosis.

(It doesn't oops, but this driver still doesn't work for William)

Cc: William Heimbigner <icxcnika@mar.tar.cc>
Cc: Peter Osterlund <petero2@telia.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 5044eed4

drivers/block/pktcdvd.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -777,7 +777,8 @@ static int pkt_generic_packet(struct pktcdvd_device pd, struct packet_command
		rq->cmd_flags \|= REQ_QUIET;

		blk_execute_rq(rq->q, pd->bdev->bd_disk, rq, 0);
		ret = rq->errors;
		if (rq->errors)
		ret = -EIO;
		out:
		blk_put_request(rq);
		return ret;