This is a note to let you know that I've just added the patch titled
brd: Fix discard request processing
to the 4.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
brd-fix-discard-request-processing.patch
and it can be found in the queue-4.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5e4298be45e83ecdffaabb370eea9396889b07f1 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
Date: Tue, 15 Dec 2015 16:38:22 +0100
Subject: brd: Fix discard request processing
From: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
commit 5e4298be45e83ecdffaabb370eea9396889b07f1 upstream.
Avoid that discard requests with size => PAGE_SIZE fail with
-EIO. Refuse discard requests if the discard size is not a
multiple of the page size.
Fixes: 2dbe54957636 ("brd: Refuse improperly aligned discard requests")
Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Robert Elliot <elliott@xxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/block/brd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -341,7 +341,7 @@ static blk_qc_t brd_make_request(struct
if (unlikely(bio->bi_rw & REQ_DISCARD)) {
if (sector & ((PAGE_SIZE >> SECTOR_SHIFT) - 1) ||
- bio->bi_iter.bi_size & PAGE_MASK)
+ bio->bi_iter.bi_size & ~PAGE_MASK)
goto io_error;
discard_from_brd(brd, sector, bio->bi_iter.bi_size);
goto out;
Patches currently in stable-queue which might be from bart.vanassche@xxxxxxxxxxx are
queue-4.5/ib-srpt-simplify-srpt_handle_tsk_mgmt.patch
queue-4.5/sd-fix-discard-granularity-when-lbprz-1.patch
queue-4.5/brd-fix-discard-request-processing.patch
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