linux-kernel - [PATCH 1/2] drivers/dax: Avoiding potential deadlock

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Message-Id: <1491888288-7635-1-git-send-email-pushkar.iit@gmail.com>
Date:   Tue, 11 Apr 2017 10:54:47 +0530
From:   Pushkar Jambhlekar <pushkar.iit@...il.com>
To:     pushkar.iit@...il.com
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] drivers/dax: Avoiding potential deadlock

dax_dev_huge_fault returning without releasing lock. Making code change to avoid this situation

Signed-off-by: Pushkar Jambhlekar <pushkar.iit@...il.com>
---
 drivers/dax/dax.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dax/dax.c b/drivers/dax/dax.c
index 0d1ca24..fd9c4db 100644
--- a/drivers/dax/dax.c
+++ b/drivers/dax/dax.c
@@ -590,7 +590,7 @@ static int dax_dev_huge_fault(struct vm_fault *vmf,
 		rc = __dax_dev_pud_fault(dax_dev, vmf);
 		break;
 	default:
-		return VM_FAULT_FALLBACK;
+		rc = VM_FAULT_FALLBACK;
 	}
 	rcu_read_unlock();
 
-- 
2.7.4