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authorMing Lei <tom.leiming@gmail.com>2010-04-13 00:29:15 +0800
committerJohn W. Linville <linville@tuxdriver.com>2010-04-14 14:52:43 -0400
commit0fa35a5836df2b8f285d6f53dfb4316c34621f88 (patch)
tree220eccf35fdff1213f4d6a1fd2c9312021e55c89 /drivers/net/wireless/ath/ath9k/wmi.c
parente6c6d33cb7d18721e56ce4bb5a0e22593956ef14 (diff)
ath9k-htc:respect usb buffer cacheline alignment in reg out path
In ath9k-htc register out 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: Sujith <Sujith.Manoharan@atheros.com> 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/wmi.c')
-rw-r--r--drivers/net/wireless/ath/ath9k/wmi.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/wireless/ath/ath9k/wmi.c b/drivers/net/wireless/ath/ath9k/wmi.c
index acb66544a2a..f2ff18cf3e6 100644
--- a/drivers/net/wireless/ath/ath9k/wmi.c
+++ b/drivers/net/wireless/ath/ath9k/wmi.c
@@ -213,7 +213,7 @@ free_skb:
static void ath9k_wmi_ctrl_tx(void *priv, struct sk_buff *skb,
enum htc_endpoint_id epid, bool txok)
{
- dev_kfree_skb_any(skb);
+ kfree_skb(skb);
}
int ath9k_wmi_connect(struct htc_target *htc, struct wmi *wmi,
@@ -269,7 +269,7 @@ int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
if (!wmi)
return -EINVAL;
- skb = dev_alloc_skb(headroom + cmd_len);
+ skb = alloc_skb(headroom + cmd_len, GFP_ATOMIC);
if (!skb)
return -ENOMEM;
@@ -313,7 +313,7 @@ out:
ath_print(common, ATH_DBG_WMI,
"WMI failure for: %s\n", wmi_cmd_to_name(cmd_id));
mutex_unlock(&wmi->op_mutex);
- dev_kfree_skb_any(skb);
+ kfree_skb(skb);
return ret;
}