Commit b242e891 authored by Ivo van Doorn's avatar Ivo van Doorn Committed by David S. Miller
Browse files

rt2x00: Request usb_maxpacket() once



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: default avatarIvo van Doorn <IvDoorn@gmail.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 2ffbb837
......@@ -1032,7 +1032,7 @@ 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;
......@@ -1041,7 +1041,7 @@ 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;
}
......@@ -1643,7 +1643,6 @@ 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;
/*
......@@ -1672,7 +1671,7 @@ 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);
......
......@@ -418,7 +418,7 @@ 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);
......@@ -598,6 +598,11 @@ struct rt2x00_dev {
*/
u32 *rf;
/*
* USB Max frame size (for rt2500usb & rt73usb).
*/
u16 usb_maxpacket;
/*
* Current TX power value.
*/
......
......@@ -159,7 +159,6 @@ 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)) {
......@@ -194,8 +193,7 @@ 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.
......@@ -490,6 +488,11 @@ int rt2x00usb_probe(struct usb_interface *usb_intf,
rt2x00dev->ops = ops;
rt2x00dev->hw = hw;
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;
......
......@@ -1251,7 +1251,7 @@ 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;
......@@ -1260,7 +1260,7 @@ 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;
}
......
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