From: Atul Gupta <atul.gupta@chelsio.com>
Date: Thu, 2 May 2019 03:47:27 -0700
Subject: crypto: chelsio - Fix softlockup with heavy I/O
Patch-mainline: v5.2-rc1
Git-commit: 33ddc108c5a1cfba72a08a92f35a0ba5bbd1cfd8
References: bsc#1136353 jsc#SLE-4688

removed un-necessary lock_chcr_dev to protect device state
DETACH. lock is not required to protect I/O count

Signed-off-by: Atul Gupta <atul.gupta@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/crypto/chelsio/chcr_algo.c |   13 +++----------
 drivers/crypto/chelsio/chcr_core.c |    4 ----
 2 files changed, 3 insertions(+), 14 deletions(-)

--- a/drivers/crypto/chelsio/chcr_algo.c
+++ b/drivers/crypto/chelsio/chcr_algo.c
@@ -200,17 +200,10 @@ void chcr_verify_tag(struct aead_request
 
 static int chcr_inc_wrcount(struct chcr_dev *dev)
 {
-	int err = 0;
-
-	spin_lock_bh(&dev->lock_chcr_dev);
 	if (dev->state == CHCR_DETACH)
-		err = 1;
-	else
-		atomic_inc(&dev->inflight);
-
-	spin_unlock_bh(&dev->lock_chcr_dev);
-
-	return err;
+		return 1;
+	atomic_inc(&dev->inflight);
+	return 0;
 }
 
 static inline void chcr_dec_wrcount(struct chcr_dev *dev)
--- a/drivers/crypto/chelsio/chcr_core.c
+++ b/drivers/crypto/chelsio/chcr_core.c
@@ -243,15 +243,11 @@ static void chcr_detach_device(struct ul
 {
 	struct chcr_dev *dev = &u_ctx->dev;
 
-	spin_lock_bh(&dev->lock_chcr_dev);
 	if (dev->state == CHCR_DETACH) {
-		spin_unlock_bh(&dev->lock_chcr_dev);
 		pr_debug("Detached Event received for already detach device\n");
 		return;
 	}
 	dev->state = CHCR_DETACH;
-	spin_unlock_bh(&dev->lock_chcr_dev);
-
 	if (atomic_read(&dev->inflight) != 0) {
 		schedule_delayed_work(&dev->detach_work, WQ_DETACH_TM);
 		wait_for_completion(&dev->detach_comp);