[PATCH 5.15.y] blk-crypto: fix missing blktrace bio split events

[Sasha Levin <sashal@kernel.org>]

From: Yu Kuai <yukuai3@huawei.com>

[ Upstream commit 06d712d297649f48ebf1381d19bd24e942813b37 ]

trace_block_split() is missing, resulting in blktrace inability to catch
BIO split events and making it harder to analyze the BIO sequence.

Cc: stable@vger.kernel.org
Fixes: 488f6682c832 ("block: blk-crypto-fallback for Inline Encryption")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
[ changed blk_crypto_fallback_split_bio_if_needed() to blk_crypto_split_bio_if_needed() ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 block/blk-crypto-fallback.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/block/blk-crypto-fallback.c b/block/blk-crypto-fallback.c
index c322176a1e099..e47716fe289dd 100644
--- a/block/blk-crypto-fallback.c
+++ b/block/blk-crypto-fallback.c
@@ -18,6 +18,7 @@
 #include <linux/mempool.h>
 #include <linux/module.h>
 #include <linux/random.h>
+#include <trace/events/block.h>
 
 #include "blk-crypto-internal.h"
 
@@ -231,7 +232,9 @@ static bool blk_crypto_split_bio_if_needed(struct bio **bio_ptr)
 			bio->bi_status = BLK_STS_RESOURCE;
 			return false;
 		}
+
 		bio_chain(split_bio, bio);
+		trace_block_split(split_bio, bio->bi_iter.bi_sector);
 		submit_bio_noacct(bio);
 		*bio_ptr = split_bio;
 	}
-- 
2.51.0