Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9081728b5f08f8137973c70e172c47ccb0dd33c9
Commit: 9081728b5f08f8137973c70e172c47ccb0dd33c9
Parent: 01c20986cb2c2aa9c66603e9be14be5ebae99aca
Author: Michael Buesch <[EMAIL PROTECTED]>
AuthorDate: Sat Dec 29 17:24:23 2007 +0100
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 15:09:30 2008 -0800
zd1211rw: fix alignment for QOS and WDS frames
This patch fixes RX packet alignment issues in the zd1211rw driver.
This is based on a patch by Johannes Berg.
Signed-off-by: Michael Buesch <[EMAIL PROTECTED]>
Signed-off-by: John W. Linville <[EMAIL PROTECTED]>
---
drivers/net/wireless/zd1211rw/zd_mac.c | 17 ++++++++++++++++-
1 files changed, 16 insertions(+), 1 deletions(-)
diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c
b/drivers/net/wireless/zd1211rw/zd_mac.c
index 14fb727..7b86930 100644
--- a/drivers/net/wireless/zd1211rw/zd_mac.c
+++ b/drivers/net/wireless/zd1211rw/zd_mac.c
@@ -623,6 +623,8 @@ int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer,
unsigned int length)
const struct rx_status *status;
struct sk_buff *skb;
int bad_frame = 0;
+ u16 fc;
+ bool is_qos, is_4addr, need_padding;
if (length < ZD_PLCP_HEADER_SIZE + 10 /* IEEE80211_1ADDR_LEN */ +
FCS_LEN + sizeof(struct rx_status))
@@ -674,9 +676,22 @@ int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer,
unsigned int length)
&& !mac->pass_ctrl)
return 0;
- skb = dev_alloc_skb(length);
+ fc = le16_to_cpu(*((__le16 *) buffer));
+
+ is_qos = ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
+ ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_QOS_DATA);
+ is_4addr = (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
+ (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
+ need_padding = is_qos ^ is_4addr;
+
+ skb = dev_alloc_skb(length + (need_padding ? 2 : 0));
if (skb == NULL)
return -ENOMEM;
+ if (need_padding) {
+ /* Make sure the the payload data is 4 byte aligned. */
+ skb_reserve(skb, 2);
+ }
+
memcpy(skb_put(skb, length), buffer, length);
ieee80211_rx_irqsafe(hw, skb, &stats);
-
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