From 4058cf08945c18a6de193f4118fd05d83d3d4285 Mon Sep 17 00:00:00 2001
From: Corentin Labbe <clabbe@baylibre.com>
Date: Mon, 21 Feb 2022 12:08:33 +0000
Subject: [PATCH] crypto: engine - check if BH is disabled during completion
Git-commit: 4058cf08945c18a6de193f4118fd05d83d3d4285
Patch-mainline: v5.18-rc1
References: git-fixes

When doing iperf over ipsec with crypto hardware sun8i-ce, I hit some
spinlock recursion bug.

This is due to completion function called with enabled BH.

Add check a to detect this.

Fixes: 735d37b5424b ("crypto: engine - Introduce the block request crypto engine framework")
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 crypto/crypto_engine.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crypto/crypto_engine.c b/crypto/crypto_engine.c
index fb07da9920ee..6056a990c9f2 100644
--- a/crypto/crypto_engine.c
+++ b/crypto/crypto_engine.c
@@ -53,6 +53,7 @@ static void crypto_finalize_request(struct crypto_engine *engine,
 				dev_err(engine->dev, "failed to unprepare request\n");
 		}
 	}
+	lockdep_assert_in_softirq();
 	req->complete(req, err);
 
 	kthread_queue_work(engine->kworker, &engine->pump_requests);
-- 
2.31.1