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ubd: untagle discard vs write zeroes not support handling

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[ Upstream commit 31ade7d4fd ]

Discard and Write Zeroes are different operation and implemented
by different fallocate opcodes for ubd.  If one fails the other one
can work and vice versa.

Split the code to disable the operations in ubd_handler to only
disable the operation that actually failed.

Fixes: 50109b5a03 ("um: Add support for DISCARD in the UBD Driver")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Link: https://lore.kernel.org/r/20240531074837.1648501-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christoph Hellwig 2024-05-31 09:47:57 +02:00 committed by Greg Kroah-Hartman
parent ca4b92eec0
commit ec85cb2895
1 changed files with 5 additions and 4 deletions
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5
arch/um/drivers/ubd_kern.c
View file

@ -458,9 +458,10 @@ static int bulk_req_safe_read(
static void ubd_end_request(struct io_thread_req *io_req)
{
if (io_req->error == BLK_STS_NOTSUPP &&
req_op(io_req->req) == REQ_OP_DISCARD) {
if (io_req->error == BLK_STS_NOTSUPP) {
if (req_op(io_req->req) == REQ_OP_DISCARD)
blk_queue_max_discard_sectors(io_req->req->q, 0);
else if (req_op(io_req->req) == REQ_OP_WRITE_ZEROES)
blk_queue_max_write_zeroes_sectors(io_req->req->q, 0);
}
blk_mq_end_request(io_req->req, io_req->error);