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| author | Dan Carpenter <error27@gmail.com> | 2010-08-19 08:52:44 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-08-19 20:48:07 -0700 |
| commit | 4da79504b2b41410dd56e9268c9ad403aa65e89c (patch) | |
| tree | 6a4df07feabd971a80ea17cbd3d10d66eafcf919 /drivers/net/qlge/qlge_main.c | |
| parent | 0add79e3134a618c10acabe58834ac647075111a (diff) | |
| download | linux-4da79504b2b41410dd56e9268c9ad403aa65e89c.tar.gz linux-4da79504b2b41410dd56e9268c9ad403aa65e89c.tar.bz2 linux-4da79504b2b41410dd56e9268c9ad403aa65e89c.zip | |
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@gmail.com>
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/qlge/qlge_main.c')
| -rw-r--r-- | 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 8d63f69b27d9..c9f9754f0784 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))) /* |