From a073fdef46d50440ee573452a436023dcf4f9edf Mon Sep 17 00:00:00 2001 From: Ivo van Doorn Date: Sat, 30 Apr 2011 17:14:23 +0200 Subject: rt2x00: Optimize TX_STA_FIFO register reading Add recycling functionality to rt2x00usb_register_read_async. When the callback function returns true, resubmit the urb to read the register again. This optimizes the rt2800usb driver when multiple TX status reports are pending in the register, because now we don't need to allocate the rt2x00_async_read_data and urb structure each time. Signed-off-by: Ivo van Doorn Acked-by: Gertjan van Wingerde Signed-off-by: John W. Linville --- drivers/net/wireless/rt2x00/rt2x00usb.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'drivers/net/wireless/rt2x00/rt2x00usb.c') diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c index 570184ee163c..e027ebd44583 100644 --- a/drivers/net/wireless/rt2x00/rt2x00usb.c +++ b/drivers/net/wireless/rt2x00/rt2x00usb.c @@ -170,19 +170,22 @@ struct rt2x00_async_read_data { __le32 reg; struct usb_ctrlrequest cr; struct rt2x00_dev *rt2x00dev; - void (*callback)(struct rt2x00_dev *,int,u32); + bool (*callback)(struct rt2x00_dev *, int, u32); }; static void rt2x00usb_register_read_async_cb(struct urb *urb) { struct rt2x00_async_read_data *rd = urb->context; - rd->callback(rd->rt2x00dev, urb->status, le32_to_cpu(rd->reg)); - kfree(urb->context); + if (rd->callback(rd->rt2x00dev, urb->status, le32_to_cpu(rd->reg))) { + if (usb_submit_urb(urb, GFP_ATOMIC) < 0) + kfree(rd); + } else + kfree(rd); } void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev, const unsigned int offset, - void (*callback)(struct rt2x00_dev*,int,u32)) + bool (*callback)(struct rt2x00_dev*, int, u32)) { struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); struct urb *urb; -- cgit v1.2.3