ath9k-htc:respect usb buffer cacheline alignment in reg in path
authorMing Lei <tom.leiming@gmail.com>
Mon, 12 Apr 2010 16:29:05 +0000 (00:29 +0800)
committerJohn W. Linville <linville@tuxdriver.com>
Wed, 14 Apr 2010 18:52:43 +0000 (14:52 -0400)
commite6c6d33cb7d18721e56ce4bb5a0e22593956ef14
tree1492732f91d4ae425c9f2e2c3de1db0229913be5
parentf28a7b30cdaa936bdbdc0a2018241936fb56cae6
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>
drivers/net/wireless/ath/ath9k/hif_usb.c
drivers/net/wireless/ath/ath9k/htc_hst.c
drivers/net/wireless/ath/ath9k/wmi.c