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ar9170usb: more minor fixes

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This patch contains a few more mostly random fixes for the USB front-end.

1. handle irq command response, instead of printing it to the console.

2. remove fixed FIXME.
    (real fix: "ar9170usb: reset device on resume". )

3. some more one-liner.
	- get rid of a useless "return;"
	- add a few branch prediction hints in hot-paths
	etc.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter
2009-05-28 17:04:27 +02:00
committed by John W. Linville
parent b55d6bcf9b
commit 66d008139c
3 changed files with 10 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/net/wireless/ath/ar9170/usb.c
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@@ -102,7 +102,7 @@ static void ar9170_usb_tx_urb_complete_free(struct urb *urb)
struct ar9170_usb *aru = (struct ar9170_usb *)
usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
if (!aru) {
if (unlikely(!aru)) {
dev_kfree_skb_irq(skb);
return ;
}
@@ -135,8 +135,8 @@ static void ar9170_usb_irq_completed(struct urb *urb)
goto resubmit;
}
print_hex_dump_bytes("ar9170 irq: ", DUMP_PREFIX_OFFSET,
urb->transfer_buffer, urb->actual_length);
ar9170_handle_command_response(&aru->common, urb->transfer_buffer,
urb->actual_length);
resubmit:
usb_anchor_urb(urb, &aru->rx_submitted);
@@ -186,16 +186,15 @@ resubmit:
usb_anchor_urb(urb, &aru->rx_submitted);
err = usb_submit_urb(urb, GFP_ATOMIC);
if (err) {
if (unlikely(err)) {
usb_unanchor_urb(urb);
dev_kfree_skb_irq(skb);
goto free;
}
return ;
free:
dev_kfree_skb_irq(skb);
return;
}
static int ar9170_usb_prep_rx_urb(struct ar9170_usb *aru,
@@ -346,7 +345,7 @@ static int ar9170_usb_exec_cmd(struct ar9170 *ar, enum ar9170_cmd cmd,
usb_anchor_urb(urb, &aru->tx_submitted);
err = usb_submit_urb(urb, GFP_ATOMIC);
if (err) {
if (unlikely(err)) {
usb_unanchor_urb(urb);
usb_free_urb(urb);
goto err_unbuf;
@@ -427,7 +426,7 @@ static void ar9170_usb_callback_cmd(struct ar9170 *ar, u32 len , void *buffer)
unsigned long flags;
u32 in, out;
if (!buffer)
if (unlikely(!buffer))
return ;
in = le32_to_cpup((__le32 *)buffer);
@@ -728,7 +727,7 @@ static int ar9170_usb_probe(struct usb_interface *intf,
#ifdef CONFIG_PM
udev->reset_resume = 1;
#endif
#endif /* CONFIG_PM */
err = ar9170_usb_reset(aru);
if (err)
goto err_freehw;
@@ -813,11 +812,6 @@ static int ar9170_resume(struct usb_interface *intf)
usb_unpoison_anchored_urbs(&aru->rx_submitted);
usb_unpoison_anchored_urbs(&aru->tx_submitted);
/*
* FIXME: firmware upload will fail on resume.
* but this is better than a hang!
*/
err = ar9170_usb_init_device(aru);
if (err)
goto err_unrx;