Files
linux/include/linux
Ming Lei 14cb0dc647 block: don't let passthrough IO go into .make_request_fn()
Commit a8821f3f3("block: Improvements to bounce-buffer handling") tries
to make sure that the bio to .make_request_fn won't exceed BIO_MAX_PAGES,
but ignores that passthrough I/O can use blk_queue_bounce() too.
Especially, passthrough IO may not be sector-aligned, and the check
of 'sectors < bio_sectors(*bio_orig)' inside __blk_queue_bounce() may
become true even though the max bvec number doesn't exceed BIO_MAX_PAGES,
then cause the bio splitted, and the original passthrough bio is submited
to generic_make_request().

This patch fixes this issue by checking if the bio is passthrough IO,
and use bio_kmalloc() to allocate the cloned passthrough bio.

Cc: NeilBrown <neilb@suse.com>
Fixes: a8821f3f3("block: Improvements to bounce-buffer handling")
Tested-by: Michele Ballabio <barra_cuda@katamail.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-12-18 13:55:43 -07:00
..
2016-07-08 16:23:11 +02:00
2017-11-13 01:34:49 +01:00
2017-06-08 18:52:36 -07:00
2017-11-23 10:56:35 +01:00
2017-11-22 21:40:54 +01:00
2017-07-03 16:56:28 -06:00
2017-11-15 18:21:04 -08:00
2017-08-30 14:40:40 +02:00
2017-09-04 00:06:02 +02:00
2017-08-24 13:23:03 -07:00
2016-10-28 08:48:16 -06:00
2017-11-15 18:21:04 -08:00
2017-07-17 13:42:48 +02:00
2017-11-05 16:42:02 -08:00
2017-08-07 17:22:14 +02:00
2017-11-13 01:41:20 +01:00
2017-11-15 18:21:06 -08:00
2017-03-21 10:15:47 +02:00
2017-05-18 10:07:40 -04:00
2017-06-21 14:37:12 -04:00
2017-11-17 16:10:04 -08:00
2017-11-15 18:21:05 -08:00
2017-11-15 18:21:01 -08:00
2017-11-17 16:10:04 -08:00
2017-10-12 15:41:05 +02:00
2017-11-15 18:21:05 -08:00
2017-11-15 18:21:01 -08:00
2017-12-01 13:09:40 -08:00
2017-10-19 10:08:56 +02:00
2017-10-07 10:45:02 -06:00
2017-02-24 17:46:57 -08:00
2017-08-28 20:51:22 +02:00
2017-11-15 18:21:04 -08:00
2017-11-29 18:40:42 -08:00
2017-11-15 18:21:04 -08:00
2017-11-17 16:10:00 -08:00
2017-07-25 18:05:25 +02:00
2017-10-20 09:37:32 +02:00
2017-11-15 18:21:03 -08:00
2017-11-15 18:21:06 -08:00
2017-11-09 10:23:28 +01:00
2017-08-06 20:55:29 -07:00
2017-11-17 16:10:04 -08:00
2017-11-17 16:10:04 -08:00
2017-11-13 01:33:48 +01:00
2017-08-16 16:28:47 -07:00
2017-11-15 18:21:04 -08:00
2017-11-07 12:22:21 +01:00
2017-07-06 16:24:30 -07:00
2017-08-16 16:28:47 -07:00
2017-11-15 18:21:01 -08:00
2017-11-15 18:21:06 -08:00
2017-11-15 18:21:01 -08:00
2017-10-11 22:36:54 -04:00
2017-07-24 17:50:37 +02:00
2017-10-04 10:29:22 +02:00
2017-08-15 09:02:07 -07:00
2017-08-15 09:02:08 -07:00