ath9k-htc:respect usb buffer cacheline alignment in ath9k_hif_usb_alloc_rx_urbs

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In ath9k_hif_usb_alloc_rx_urbs, 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 skbs 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>

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Ming Lei 2010-04-13 00:28:53 +08:00 • committed by John W. Linville

parent 87d77c4ef1

commit f28a7b30cd

1 changed files with 3 additions and 3 deletions

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6

drivers/net/wireless/ath/ath9k/hif_usb.c

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