Commit-ID: 4da79504b2b41410dd56e9268c9ad403aa65e89c
Gitweb: http://git.kernel.org/tip/4da79504b2b41410dd56e9268c9ad403aa65e89c
Author: Dan Carpenter <error27@xxxxxxxxx>
AuthorDate: Thu, 19 Aug 2010 08:52:44 +0000
Committer: David S. Miller <davem@xxxxxxxxxxxxx>
CommitDate: Thu, 19 Aug 2010 20:48:07 -0700
qlge: pull NULL check ahead of dereference
There was a dereference before NULL check issue introduced in 1e213303d
"qlge: Add tx multiqueue support." I've pulled the NULL check of
"net_rsp" forward a couple lines to avoid that.
Also Ron Mercer says that the early exit should be above the index
write. ql_write_cq_idx(rx_ring);
Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
Signed-off-by: Ron Mercer <ron.mercer@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
---
drivers/net/qlge/qlge_main.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/qlge/qlge_main.c b/drivers/net/qlge/qlge_main.c
index 8d63f69..c9f9754 100644
--- a/drivers/net/qlge/qlge_main.c
+++ b/drivers/net/qlge/qlge_main.c
@@ -2222,10 +2222,11 @@ static int ql_clean_outbound_rx_ring(struct rx_ring *rx_ring)
ql_update_cq(rx_ring);
prod = ql_read_sh_reg(rx_ring->prod_idx_sh_reg);
}
+ if (!net_rsp)
+ return 0;
ql_write_cq_idx(rx_ring);
tx_ring = &qdev->tx_ring[net_rsp->txq_idx];
- if (__netif_subqueue_stopped(qdev->ndev, tx_ring->wq_id) &&
- net_rsp != NULL) {
+ if (__netif_subqueue_stopped(qdev->ndev, tx_ring->wq_id)) {
if (atomic_read(&tx_ring->queue_stopped) &&
(atomic_read(&tx_ring->tx_count) > (tx_ring->wq_len / 4)))
/*
--
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