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authorBenoit Papillault <benoit.papillault@free.fr>2009-12-04 23:47:06 +0100
committerJohn W. Linville <linville@tuxdriver.com>2009-12-21 18:56:39 -0500
commit5de42f9eeafa7d54ffb833e0526d4828e194fddb (patch)
tree4e7318d01b6e46e0271c17b347854e5c67712c8c /drivers/net/wireless/rt2x00/rt2800usb.c
parent9c8427d9deca1c0c2415c8da0e731e13fc89d111 (diff)
downloadblackbird-op-linux-5de42f9eeafa7d54ffb833e0526d4828e194fddb.tar.gz
blackbird-op-linux-5de42f9eeafa7d54ffb833e0526d4828e194fddb.zip
rt2x00: Fix rt2800usb RX frame format and as such L2PAD
According to Ralink source code, the RX frame format is RXINFO + RXWI + 802.11 frame + RXD, including various padding. Before this patch, we were using RXD + RXWI + 802.11 frame, so RXD was not correct. Doing this, we fix the L2PAD bit which is now correctly set on received frames. Signed-off-by: Benoit Papillault <benoit.papillault@free.fr> Acked-by: Ivo van Doorn <ivdoorn@gmail.com> Acked-by: Gertjan van Wingerde <gwingerde@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2800usb.c')
-rw-r--r--drivers/net/wireless/rt2x00/rt2800usb.c38
1 files changed, 27 insertions, 11 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2800usb.c b/drivers/net/wireless/rt2x00/rt2800usb.c
index 9c4412b42e5b..40295b454ff6 100644
--- a/drivers/net/wireless/rt2x00/rt2800usb.c
+++ b/drivers/net/wireless/rt2x00/rt2800usb.c
@@ -571,41 +571,57 @@ static void rt2800usb_fill_rxdone(struct queue_entry *entry,
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
- __le32 *rxd = (__le32 *)entry->skb->data;
+ __le32 *rxi = (__le32 *)entry->skb->data;
__le32 *rxwi;
- u32 rxd0;
+ __le32 *rxd;
+ u32 rxi0;
u32 rxwi0;
u32 rxwi1;
u32 rxwi2;
u32 rxwi3;
+ u32 rxd0;
+ int rx_pkt_len;
+
+ /*
+ * RX frame format is :
+ * | RXINFO | RXWI | header | L2 pad | payload | pad | RXD | USB pad |
+ * |<------------ rx_pkt_len -------------->|
+ */
+ rt2x00_desc_read(rxi, 0, &rxi0);
+ rx_pkt_len = rt2x00_get_field32(rxi0, RXINFO_W0_USB_DMA_RX_PKT_LEN);
+
+ rxwi = (__le32 *)(entry->skb->data + RXINFO_DESC_SIZE);
+
+ /*
+ * FIXME : we need to check for rx_pkt_len validity
+ */
+ rxd = (__le32 *)(entry->skb->data + RXINFO_DESC_SIZE + rx_pkt_len);
/*
* Copy descriptor to the skbdesc->desc buffer, making it safe from
* moving of frame data in rt2x00usb.
*/
- memcpy(skbdesc->desc, rxd, skbdesc->desc_len);
- rxd = (__le32 *)skbdesc->desc;
- rxwi = &rxd[RXINFO_DESC_SIZE / sizeof(__le32)];
+ memcpy(skbdesc->desc, rxi, skbdesc->desc_len);
/*
* It is now safe to read the descriptor on all architectures.
*/
- rt2x00_desc_read(rxd, 0, &rxd0);
rt2x00_desc_read(rxwi, 0, &rxwi0);
rt2x00_desc_read(rxwi, 1, &rxwi1);
rt2x00_desc_read(rxwi, 2, &rxwi2);
rt2x00_desc_read(rxwi, 3, &rxwi3);
+ rt2x00_desc_read(rxd, 0, &rxd0);
- if (rt2x00_get_field32(rxd0, RXINFO_W0_CRC_ERROR))
+ if (rt2x00_get_field32(rxd0, RXD_W0_CRC_ERROR))
rxdesc->flags |= RX_FLAG_FAILED_FCS_CRC;
if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags)) {
rxdesc->cipher = rt2x00_get_field32(rxwi0, RXWI_W0_UDF);
rxdesc->cipher_status =
- rt2x00_get_field32(rxd0, RXINFO_W0_CIPHER_ERROR);
+ rt2x00_get_field32(rxd0, RXD_W0_CIPHER_ERROR);
}
- if (rt2x00_get_field32(rxd0, RXINFO_W0_DECRYPTED)) {
+ if (rt2x00_get_field32(rxd0, RXD_W0_DECRYPTED)) {
/*
* Hardware has stripped IV/EIV data from 802.11 frame during
* decryption. Unfortunately the descriptor doesn't contain
@@ -620,10 +636,10 @@ static void rt2800usb_fill_rxdone(struct queue_entry *entry,
rxdesc->flags |= RX_FLAG_MMIC_ERROR;
}
- if (rt2x00_get_field32(rxd0, RXINFO_W0_MY_BSS))
+ if (rt2x00_get_field32(rxd0, RXD_W0_MY_BSS))
rxdesc->dev_flags |= RXDONE_MY_BSS;
- if (rt2x00_get_field32(rxd0, RXINFO_W0_L2PAD))
+ if (rt2x00_get_field32(rxd0, RXD_W0_L2PAD))
rxdesc->dev_flags |= RXDONE_L2PAD;
if (rt2x00_get_field32(rxwi1, RXWI_W1_SHORT_GI))
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