diff options
| author | Shaddy Baddah <shaddy_baddah@hotmail.com> | 2008-11-28 17:10:45 +1100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-12-05 09:18:35 -0500 |
| commit | cde6901b7b69557a6f90f3183f76eda581af015e (patch) | |
| tree | 7a0eeb25bedefb1713067e0539ce376d9d7308dd /drivers/net/wireless/zd1211rw/zd_mac.c | |
| parent | 5cf12e8dc641ef028f0cf9c317a9567e6b794de1 (diff) | |
| download | linux-cde6901b7b69557a6f90f3183f76eda581af015e.tar.gz | |
zd1211rw: use unaligned safe memcmp() in-place of compare_ether_addr()
Under my 2.6.28-rc6 sparc64, when associating to an AP through my
zd1211rw device, I was seeing kernel log messages like (not exact output):
Kernel unaligned access at TPC[10129b68] zd_mac_rx+0x144/0x32c [zd1211rw]
For the zd1211rw module, on RX, the 80211 packet will be located after
the PLCP header in the skb data buffer. The PLCP header being 5 bytes
long, the 80211 header will start unaligned from an aligned skb
buffer.
As per Documentation/unaligned-memory-access.txt, we must replace the
not unaligned() safe compare_ether_addr() with memcmp() to protect
architectures that require alignment.
Signed-off-by: Shaddy Baddah <shaddy_baddah@hotmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/zd1211rw/zd_mac.c')
| -rw-r--r-- | drivers/net/wireless/zd1211rw/zd_mac.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c index fe1867b25ff7fb..cac732f4047f52 100644 --- a/drivers/net/wireless/zd1211rw/zd_mac.c +++ b/drivers/net/wireless/zd1211rw/zd_mac.c @@ -615,7 +615,7 @@ static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr, struct ieee80211_hdr *tx_hdr; tx_hdr = (struct ieee80211_hdr *)skb->data; - if (likely(!compare_ether_addr(tx_hdr->addr2, rx_hdr->addr1))) + if (likely(!memcmp(tx_hdr->addr2, rx_hdr->addr1, ETH_ALEN))) { __skb_unlink(skb, q); tx_status(hw, skb, IEEE80211_TX_STAT_ACK, stats->signal, 1); |