Thread (285 messages) 285 messages, 6 authors, 2021-11-25
STALE1694d REVIEWED: 1 (0M)

[PATCH 5.15 126/279] iavf: dont clear a lock we dont hold

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-11-24 13:55:57
Also in: lkml
Subsystem: intel ethernet drivers, networking drivers, the rest · Maintainers: Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds

From: Nicholas Nunley <redacted>

[ Upstream commit 2135a8d5c8186bc92901dc00f179ffd50e54c2ac ]

In iavf_configure_clsflower() the function will bail out if it is unable
to obtain the crit_section lock in a reasonable time. However, it will
clear the lock when exiting, so fix this.

Fixes: 640a8af5841f ("i40evf: Reorder configure_clsflower to avoid deadlock on error")
Signed-off-by: Nicholas Nunley <redacted>
Tested-by: Tony Brelinski <redacted>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/intel/iavf/iavf_main.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c
index 5664a1905e8bb..f64ccf6286ec1 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -3041,8 +3041,10 @@ static int iavf_configure_clsflower(struct iavf_adapter *adapter,
 		return -ENOMEM;
 
 	while (!mutex_trylock(&adapter->crit_lock)) {
-		if (--count == 0)
-			goto err;
+		if (--count == 0) {
+			kfree(filter);
+			return err;
+		}
 		udelay(1);
 	}
 
-- 
2.33.0


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