redonkable/alistair23-linux
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rt2x00: In debugfs frame dumping allow the TX descriptor to be part of the skb.

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Preparation for futher cleanups in the area of properly maintaining the skb
data without fiddling with the skb->data pointer.

Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Gertjan van Wingerde 2010-05-11 23:51:43 +02:00 committed by John W. Linville
parent 185e5f77f8
commit fd76f148eb
2 changed files with 13 additions and 4 deletions
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14
drivers/net/wireless/rt2x00/rt2x00debug.c
View file

@ -159,6 +159,7 @@ void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
struct sk_buff *skbcopy;
struct rt2x00dump_hdr *dump_hdr;
struct timeval timestamp;
u32 data_len;
do_gettimeofday(&timestamp);
@ -170,7 +171,11 @@ void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
return;
}
skbcopy = alloc_skb(sizeof(*dump_hdr) + skbdesc->desc_len + skb->len,
data_len = skb->len;
if (skbdesc->flags & SKBDESC_DESC_IN_SKB)
data_len -= skbdesc->desc_len;
skbcopy = alloc_skb(sizeof(*dump_hdr) + skbdesc->desc_len + data_len,
GFP_ATOMIC);
if (!skbcopy) {
DEBUG(rt2x00dev, "Failed to copy skb for dump.\n");
@ -181,7 +186,7 @@ void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
dump_hdr->desc_length = cpu_to_le32(skbdesc->desc_len);
dump_hdr->data_length = cpu_to_le32(skb->len);
dump_hdr->data_length = cpu_to_le32(data_len);
dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
dump_hdr->chip_rev = cpu_to_le16(rt2x00dev->chip.rev);
@ -191,8 +196,9 @@ void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);
memcpy(skb_put(skbcopy, skbdesc->desc_len), skbdesc->desc,
skbdesc->desc_len);
if (!(skbdesc->flags & SKBDESC_DESC_IN_SKB))
memcpy(skb_put(skbcopy, skbdesc->desc_len), skbdesc->desc,
skbdesc->desc_len);
memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len);
skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);

3
drivers/net/wireless/rt2x00/rt2x00queue.h
View file

@ -94,12 +94,15 @@ enum data_queue_qid {
* mac80211 but was stripped for processing by the driver.
* @SKBDESC_NOT_MAC80211: Frame didn't originate from mac80211,
* don't try to pass it back.
* @SKBDESC_DESC_IN_SKB: The descriptor is at the start of the
* skb, instead of in the desc field.
*/
enum skb_frame_desc_flags {
SKBDESC_DMA_MAPPED_RX = 1 << 0,
SKBDESC_DMA_MAPPED_TX = 1 << 1,
SKBDESC_IV_STRIPPED = 1 << 2,
SKBDESC_NOT_MAC80211 = 1 << 3,
SKBDESC_DESC_IN_SKB = 1 << 4,
};
/**