The usb max packet size won't change during the
device's presence. We should store it in a
variable inside rt2x00dev and use that.
This should also fix a division error when the
device is being hot-unplugged while a frame is
being send out.
Signed-off-by: Ivo van Doorn <IvDoorn@xxxxxxxxx>
---
John, please queue for 2.6.24 since this fixes the kernel panic
reported in kernel bugzilla [9368]
drivers/net/wireless/rt2x00/rt2500usb.c | 7 +++----
drivers/net/wireless/rt2x00/rt2x00.h | 7 ++++++-
drivers/net/wireless/rt2x00/rt2x00usb.c | 9 ++++++---
drivers/net/wireless/rt2x00/rt73usb.c | 4 ++--
4 files changed, 17 insertions(+), 10 deletions(-)
diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c
index b5a8f82..5bfbac4 100644
--- a/drivers/net/wireless/rt2x00/rt2500usb.c
+++ b/drivers/net/wireless/rt2x00/rt2500usb.c
@@ -1072,7 +1072,7 @@ static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
}
static int rt2500usb_get_tx_data_len(struct rt2x00_dev *rt2x00dev,
- int maxpacket, struct sk_buff *skb)
+ struct sk_buff *skb)
{
int length;
@@ -1081,7 +1081,7 @@ static int rt2500usb_get_tx_data_len(struct rt2x00_dev *rt2x00dev,
* but it must _not_ be a multiple of the USB packet size.
*/
length = roundup(skb->len, 2);
- length += (2 * !(length % maxpacket));
+ length += (2 * !(length % rt2x00dev->usb_maxpacket));
return length;
}
@@ -1696,7 +1696,6 @@ static int rt2500usb_beacon_update(struct ieee80211_hw *hw,
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;
/*
@@ -1725,7 +1724,7 @@ static int rt2500usb_beacon_update(struct ieee80211_hw *hw,
ring->desc_size),
skb->len - ring->desc_size, control);
- length = rt2500usb_get_tx_data_len(rt2x00dev, max_packet, skb);
+ length = rt2500usb_get_tx_data_len(rt2x00dev, skb);
usb_fill_bulk_urb(beacon->priv, usb_dev, pipe,
skb->data, length, rt2500usb_beacondone, beacon);
diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h
index 12382c3..84b0fc9 100644
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -497,7 +497,7 @@ 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,
+ int (*get_tx_data_len) (struct rt2x00_dev *rt2x00dev,
struct sk_buff *skb);
void (*kick_tx_queue) (struct rt2x00_dev *rt2x00dev,
unsigned int queue);
@@ -697,6 +697,11 @@ struct rt2x00_dev {
u32 *rf;
/*
+ * USB Max frame size (for rt2500usb & rt73usb).
+ */
+ u16 usb_maxpacket;
+
+ /*
* Current TX power value.
*/
u16 tx_power;
diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c
index f61dee5..936e554 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.c
@@ -182,7 +182,6 @@ int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
struct data_entry *entry = rt2x00_get_data_entry(ring);
int pipe = usb_sndbulkpipe(usb_dev, 1);
- int max_packet = usb_maxpacket(usb_dev, pipe, 1);
u32 length;
if (rt2x00_ring_full(ring)) {
@@ -217,8 +216,7 @@ int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
* length of the data to usb_fill_bulk_urb. Pass the skb
* to the driver to determine what the length should be.
*/
- length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev,
- max_packet, skb);
+ length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev, skb);
/*
* Initialize URB and send the frame to the device.
@@ -514,6 +512,11 @@ int rt2x00usb_probe(struct usb_interface *usb_intf,
rt2x00dev->hw = hw;
mutex_init(&rt2x00dev->usb_cache_mutex);
+ rt2x00dev->usb_maxpacket =
+ usb_maxpacket(usb_dev, usb_sndbulkpipe(usb_dev, 1), 1);
+ if (!rt2x00dev->usb_maxpacket)
+ rt2x00dev->usb_maxpacket = 1;
+
retval = rt2x00usb_alloc_reg(rt2x00dev);
if (retval)
goto exit_free_device;
diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c
index 9bd0b4f..4d1227a 100644
--- a/drivers/net/wireless/rt2x00/rt73usb.c
+++ b/drivers/net/wireless/rt2x00/rt73usb.c
@@ -1293,7 +1293,7 @@ static void rt73usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
}
static int rt73usb_get_tx_data_len(struct rt2x00_dev *rt2x00dev,
- int maxpacket, struct sk_buff *skb)
+ struct sk_buff *skb)
{
int length;
@@ -1302,7 +1302,7 @@ static int rt73usb_get_tx_data_len(struct rt2x00_dev *rt2x00dev,
* but it must _not_ be a multiple of the USB packet size.
*/
length = roundup(skb->len, 4);
- length += (4 * !(length % maxpacket));
+ length += (4 * !(length % rt2x00dev->usb_maxpacket));
return length;
}
--
1.5.3.4
-
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