The TX datalen must always be converted to a value rt73 and rt2500usb
understand. Both require to use a different size then skb->len.
First off this is required because the descriptor must be added,
but the second is because the value must be a multiple of either 2 or 4,
and it should not be a multiple of the USB packetmax
Signed-off-by: Ivo van Doorn <IvDoorn@xxxxxxxxx>
---
drivers/net/wireless/rt2x00/rt2500usb.c | 32 ++++++++++++++++++++----------
drivers/net/wireless/rt2x00/rt2x00.h | 2 +
drivers/net/wireless/rt2x00/rt2x00usb.c | 29 ++++++++++++++++-----------
drivers/net/wireless/rt2x00/rt73usb.c | 16 +++++++++++++++
4 files changed, 56 insertions(+), 23 deletions(-)
diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c
index c1f217b..c4aa466 100644
--- a/drivers/net/wireless/rt2x00/rt2500usb.c
+++ b/drivers/net/wireless/rt2x00/rt2500usb.c
@@ -1057,6 +1057,21 @@ static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
rt2x00_desc_write(txd, 0, word);
}
+static int rt2500usb_get_tx_data_len(struct rt2x00_dev *rt2x00dev,
+ int maxpacket, struct sk_buff *skb)
+{
+ int length;
+
+ /*
+ * The length _must_ be a multiple of 2,
+ * but it must _not_ be a multiple of the USB packet size.
+ */
+ length = roundup(skb->len, 2);
+ length += (2 * !(length % maxpacket));
+
+ return length;
+}
+
/*
* TX data initialization
*/
@@ -1651,6 +1666,8 @@ static int rt2500usb_beacon_update(struct ieee80211_hw *hw,
rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
struct data_entry *beacon;
struct data_entry *guardian;
+ int pipe = usb_sndbulkpipe(usb_dev, 1);
+ int max_packet = usb_maxpacket(usb_dev, pipe, 1);
int length;
/*
@@ -1677,16 +1694,9 @@ static int rt2500usb_beacon_update(struct ieee80211_hw *hw,
ring->desc_size),
skb->len - ring->desc_size, control);
- /*
- * Length passed to usb_fill_urb cannot be an odd number,
- * so add 1 byte to make it even.
- */
- length = skb->len;
- if (length % 2)
- length++;
+ length = rt2500usb_get_tx_data_len(rt2x00dev, max_packet, skb);
- usb_fill_bulk_urb(beacon->priv, usb_dev,
- usb_sndbulkpipe(usb_dev, 1),
+ usb_fill_bulk_urb(beacon->priv, usb_dev, pipe,
skb->data, length, rt2500usb_beacondone, beacon);
beacon->skb = skb;
@@ -1697,8 +1707,7 @@ static int rt2500usb_beacon_update(struct ieee80211_hw *hw,
* the 'flags' field we are not using for beacons.
*/
guardian->flags = 0;
- usb_fill_bulk_urb(guardian->priv, usb_dev,
- usb_sndbulkpipe(usb_dev, 1),
+ usb_fill_bulk_urb(guardian->priv, usb_dev, pipe,
&guardian->flags, 1, rt2500usb_beacondone, guardian);
/*
@@ -1739,6 +1748,7 @@ static const struct rt2x00lib_ops rt2500usb_rt2x00_ops = {
.link_tuner = rt2500usb_link_tuner,
.write_tx_desc = rt2500usb_write_tx_desc,
.write_tx_data = rt2x00usb_write_tx_data,
+ .get_tx_data_len = rt2500usb_get_tx_data_len,
.kick_tx_queue = rt2500usb_kick_tx_queue,
.fill_rxdone = rt2500usb_fill_rxdone,
.config_mac_addr = rt2500usb_config_mac_addr,
diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h
index 27bec6e..a392e2a 100644
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -396,6 +396,8 @@ struct rt2x00lib_ops {
int (*write_tx_data) (struct rt2x00_dev *rt2x00dev,
struct data_ring *ring, struct sk_buff *skb,
struct ieee80211_tx_control *control);
+ int (*get_tx_data_len) (struct rt2x00_dev *rt2x00dev, int maxpacket,
+ struct sk_buff *skb);
void (*kick_tx_queue) (struct rt2x00_dev *rt2x00dev,
unsigned int queue);
diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c
index 66e4761..73cc726 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.c
@@ -157,9 +157,10 @@ int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
{
struct usb_device *usb_dev =
interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
- struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data;
struct data_entry *entry = rt2x00_get_data_entry(ring);
- u32 length = skb->len;
+ int pipe = usb_sndbulkpipe(usb_dev, 1);
+ int max_packet = usb_maxpacket(usb_dev, pipe, 1);
+ u32 length;
if (rt2x00_ring_full(ring)) {
ieee80211_stop_queue(rt2x00dev->hw, control->queue);
@@ -178,25 +179,29 @@ int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
/*
* Add the descriptor in front of the skb.
*/
- skb_push(skb, rt2x00dev->hw->extra_tx_headroom);
- memset(skb->data, 0x00, rt2x00dev->hw->extra_tx_headroom);
+ skb_push(skb, ring->desc_size);
+ memset(skb->data, 0, ring->desc_size);
rt2x00lib_write_tx_desc(rt2x00dev, (struct data_desc *)skb->data,
- ieee80211hdr, length, control);
+ (struct ieee80211_hdr *)(skb->data +
+ ring->desc_size),
+ skb->len - ring->desc_size, control);
memcpy(&entry->tx_status.control, control, sizeof(*control));
entry->skb = skb;
/*
- * Length passed to usb_fill_urb cannot be an odd number,
- * so add 1 byte to make it even.
+ * USB devices cannot blindly pass the skb->len as the
+ * length of the data to usb_fill_bulk_urb. Pass the skb
+ * to the driver to determine what the length should be.
*/
- length += rt2x00dev->hw->extra_tx_headroom;
- if (length % 2)
- length++;
+ length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev,
+ max_packet, skb);
+ /*
+ * Initialize URB and send the frame to the device.
+ */
__set_bit(ENTRY_OWNER_NIC, &entry->flags);
- usb_fill_bulk_urb(entry->priv, usb_dev,
- usb_sndbulkpipe(usb_dev, 1),
+ usb_fill_bulk_urb(entry->priv, usb_dev, pipe,
skb->data, length, rt2x00usb_interrupt_txdone, entry);
usb_submit_urb(entry->priv, GFP_ATOMIC);
diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c
index e7887c3..7cfdf65 100644
--- a/drivers/net/wireless/rt2x00/rt73usb.c
+++ b/drivers/net/wireless/rt2x00/rt73usb.c
@@ -1286,6 +1286,21 @@ static void rt73usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
rt2x00_desc_write(txd, 0, word);
}
+static int rt73usb_get_tx_data_len(struct rt2x00_dev *rt2x00dev,
+ int maxpacket, struct sk_buff *skb)
+{
+ int length;
+
+ /*
+ * The length _must_ be a multiple of 4,
+ * but it must _not_ be a multiple of the USB packet size.
+ */
+ length = roundup(skb->len, 4);
+ length += (4 * !(length % maxpacket));
+
+ return length;
+}
+
/*
* TX data initialization
*/
@@ -2010,6 +2025,7 @@ static const struct rt2x00lib_ops rt73usb_rt2x00_ops = {
.link_tuner = rt73usb_link_tuner,
.write_tx_desc = rt73usb_write_tx_desc,
.write_tx_data = rt2x00usb_write_tx_data,
+ .get_tx_data_len = rt73usb_get_tx_data_len,
.kick_tx_queue = rt73usb_kick_tx_queue,
.fill_rxdone = rt73usb_fill_rxdone,
.config_mac_addr = rt73usb_config_mac_addr,
--
1.5.3.4
-
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