[dm-devel] Patch "dm-log-writes: set dma_alignment limit in io_hints" has been added to the 6.0-stable tree

[Sasha Levin]

This is a note to let you know that I've just added the patch titled

    dm-log-writes: set dma_alignment limit in io_hints

to the 6.0-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:
     dm-log-writes-set-dma_alignment-limit-in-io_hints.patch
and it can be found in the queue-6.0 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable at vger.kernel.org> know about it.



commit a2bb97fda79bb557402e0412c36255dcbdd773fe
Author: Keith Busch <kbusch at kernel.org>
Date:   Thu Nov 10 10:45:01 2022 -0800

    dm-log-writes: set dma_alignment limit in io_hints
    
    [ Upstream commit 50a893359cd2643ee1afc96eedc9e7084cab49fa ]
    
    This device mapper needs bio vectors to be sized and memory aligned to
    the logical block size. Set the minimum required queue limit
    accordingly.
    
    Signed-off-by: Keith Busch <kbusch at kernel.org>
    Reviewed-by: Mike Snitzer <snitzer at kernel.org>
    Link: https://lore.kernel.org/r/20221110184501.2451620-6-kbusch@meta.com
    Signed-off-by: Jens Axboe <axboe at kernel.dk>
    Signed-off-by: Sasha Levin <sashal at kernel.org>

diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c
index 20fd688f72e7..178e13a5b059 100644
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -875,6 +875,7 @@ static void log_writes_io_hints(struct dm_target *ti, struct queue_limits *limit
 	limits->logical_block_size = bdev_logical_block_size(lc->dev->bdev);
 	limits->physical_block_size = bdev_physical_block_size(lc->dev->bdev);
 	limits->io_min = limits->physical_block_size;
+	limits->dma_alignment = limits->logical_block_size - 1;
 }
 
 #if IS_ENABLED(CONFIG_FS_DAX)