diff options
author | Ming Lei <tom.leiming@gmail.com> | 2010-04-13 00:29:15 +0800 |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2010-04-14 14:52:43 -0400 |
commit | 0fa35a5836df2b8f285d6f53dfb4316c34621f88 (patch) | |
tree | 220eccf35fdff1213f4d6a1fd2c9312021e55c89 /drivers/net/wireless/ath/ath9k/htc_hst.c | |
parent | e6c6d33cb7d18721e56ce4bb5a0e22593956ef14 (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/htc_hst.c')
-rw-r--r-- | drivers/net/wireless/ath/ath9k/htc_hst.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.c b/drivers/net/wireless/ath/ath9k/htc_hst.c index d1fa5bd6bdbb..587d98ed0989 100644 --- a/drivers/net/wireless/ath/ath9k/htc_hst.c +++ b/drivers/net/wireless/ath/ath9k/htc_hst.c @@ -146,7 +146,7 @@ static int htc_config_pipe_credits(struct htc_target *target) struct htc_config_pipe_msg *cp_msg; int ret, time_left; - skb = dev_alloc_skb(50 + sizeof(struct htc_frame_hdr)); + skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC); if (!skb) { dev_err(target->dev, "failed to allocate send buffer\n"); return -ENOMEM; @@ -174,7 +174,7 @@ static int htc_config_pipe_credits(struct htc_target *target) return 0; err: - dev_kfree_skb(skb); + kfree_skb(skb); return -EINVAL; } @@ -184,7 +184,7 @@ static int htc_setup_complete(struct htc_target *target) struct htc_comp_msg *comp_msg; int ret = 0, time_left; - skb = dev_alloc_skb(50 + sizeof(struct htc_frame_hdr)); + skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC); if (!skb) { dev_err(target->dev, "failed to allocate send buffer\n"); return -ENOMEM; @@ -210,7 +210,7 @@ static int htc_setup_complete(struct htc_target *target) return 0; err: - dev_kfree_skb(skb); + kfree_skb(skb); return -EINVAL; } @@ -250,8 +250,8 @@ int htc_connect_service(struct htc_target *target, endpoint->dl_pipeid = service_to_dlpipe(service_connreq->service_id); endpoint->ep_callbacks = service_connreq->ep_callbacks; - skb = dev_alloc_skb(sizeof(struct htc_conn_svc_msg) + - sizeof(struct htc_frame_hdr)); + skb = alloc_skb(sizeof(struct htc_conn_svc_msg) + + sizeof(struct htc_frame_hdr), GFP_ATOMIC); if (!skb) { dev_err(target->dev, "Failed to allocate buf to send" "service connect req\n"); @@ -282,7 +282,7 @@ int htc_connect_service(struct htc_target *target, *conn_rsp_epid = target->conn_rsp_epid; return 0; err: - dev_kfree_skb(skb); + kfree_skb(skb); return ret; } @@ -321,7 +321,7 @@ void ath9k_htc_txcompletion_cb(struct htc_target *htc_handle, struct sk_buff *skb, bool txok) { struct htc_endpoint *endpoint; - struct htc_frame_hdr *htc_hdr; + struct htc_frame_hdr *htc_hdr = NULL; if (htc_handle->htc_flags & HTC_OP_CONFIG_PIPE_CREDITS) { complete(&htc_handle->cmd_wait); @@ -349,7 +349,10 @@ void ath9k_htc_txcompletion_cb(struct htc_target *htc_handle, return; ret: /* HTC-generated packets are freed here. */ - dev_kfree_skb_any(skb); + if (htc_hdr && htc_hdr->endpoint_id != ENDPOINT0) + dev_kfree_skb_any(skb); + else + kfree_skb(skb); } /* |