[PATCH] dm-integrity: set discard_granularity to logical block size

[Mikulas Patocka <mpatocka@xxxxxxxxxx>]

dm-integrity could set discard_granularity lower than the logical block
size. This could result in failures when sending discard requests to
dm-integrity. This patch fixes discard_granularity.

Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Reported-by: Eric Wheeler <linux-integrity@xxxxxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx

---
 drivers/md/dm-integrity.c |    1 +
 1 file changed, 1 insertion(+)

Index: linux-2.6/drivers/md/dm-integrity.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-integrity.c	2024-04-16 21:31:36.000000000 +0200
+++ linux-2.6/drivers/md/dm-integrity.c	2024-05-20 16:27:50.000000000 +0200
@@ -3492,6 +3492,7 @@ static void dm_integrity_io_hints(struct
 		limits->physical_block_size = ic->sectors_per_block << SECTOR_SHIFT;
 		blk_limits_io_min(limits, ic->sectors_per_block << SECTOR_SHIFT);
 		limits->dma_alignment = limits->logical_block_size - 1;
+		limits->discard_granularity = ic->sectors_per_block << SECTOR_SHIFT;
 	}
 	limits->max_integrity_segments = USHRT_MAX;
 }