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authorMing Lei <tom.leiming@gmail.com>2010-04-13 00:29:05 +0800
committerJohn W. Linville <linville@tuxdriver.com>2010-04-14 14:52:43 -0400
commite6c6d33cb7d18721e56ce4bb5a0e22593956ef14 (patch)
tree1492732f91d4ae425c9f2e2c3de1db0229913be5 /drivers/net/wireless/ath/ath9k/htc_hst.c
parentf28a7b30cdaa936bdbdc0a2018241936fb56cae6 (diff)
ath9k-htc:respect usb buffer cacheline alignment in reg in path
In ath9k-htc register in path, ath9k-htc will pass skb->data into usb hcd and usb hcd will do dma mapping and unmapping to the buffer pointed by skb->data, so we should pass a cache-line aligned address. This patch replace __dev_alloc_skb with alloc_skb to make skb->data pointed to a cacheline aligned address simply since ath9k-htc does not skb_push on the skb and pass it to mac80211, also use kfree_skb to free the skb allocated by alloc_skb(we can use kfree_skb safely in hardirq context since skb->destructor is NULL always in the path). Signed-off-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/htc_hst.c')
-rw-r--r--drivers/net/wireless/ath/ath9k/htc_hst.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.c b/drivers/net/wireless/ath/ath9k/htc_hst.c
index 24d7b886fe2..d1fa5bd6bdb 100644
--- a/drivers/net/wireless/ath/ath9k/htc_hst.c
+++ b/drivers/net/wireless/ath/ath9k/htc_hst.c
@@ -374,7 +374,10 @@ void ath9k_htc_rx_msg(struct htc_target *htc_handle,
epid = htc_hdr->endpoint_id;
if (epid >= ENDPOINT_MAX) {
- dev_kfree_skb_any(skb);
+ if (pipe_id != USB_REG_IN_PIPE)
+ dev_kfree_skb_any(skb);
+ else
+ kfree_skb(skb);
return;
}
@@ -403,7 +406,7 @@ void ath9k_htc_rx_msg(struct htc_target *htc_handle,
break;
}
- dev_kfree_skb_any(skb);
+ kfree_skb(skb);
} else {
if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER)