[PATCH 5.4 104/320] rocker: fix a sleeping in atomic bug

Greg Kroah-Hartman
2022-01-24T19:32:37Z

From: Dan Carpenter <dan.carpenter@oracle.com>

[ Upstream commit 43d012123122cc69feacab55b71369f386c19566 ]

This code is holding the &ofdpa->flow_tbl_lock spinlock so it is not
allowed to sleep. That means we have to pass the OFDPA_OP_FLAG_NOWAIT
flag to ofdpa_flow_tbl_del().

Fixes: 936bd486564a ("rocker: use FIB notifications instead of switchdev calls")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/rocker/rocker_ofdpa.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/rocker/rocker_ofdpa.c b/drivers/net/ethernet/rocker/rocker_ofdpa.c
index 7072b249c8bd6..8157666209798 100644
--- a/drivers/net/ethernet/rocker/rocker_ofdpa.c
+++ b/drivers/net/ethernet/rocker/rocker_ofdpa.c
@@ -2795,7 +2795,8 @@ static void ofdpa_fib4_abort(struct rocker *rocker)
if (!ofdpa_port)
continue;
nh->fib_nh_flags &= ~RTNH_F_OFFLOAD;
- ofdpa_flow_tbl_del(ofdpa_port, OFDPA_OP_FLAG_REMOVE,
+ ofdpa_flow_tbl_del(ofdpa_port,
+ OFDPA_OP_FLAG_REMOVE | OFDPA_OP_FLAG_NOWAIT,
flow_entry);
}
spin_unlock_irqrestore(&ofdpa->flow_tbl_lock, flags);
--
2.34.1