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ar9170usb: fix hang on resume

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This patch fixes a hang on resume when the filesystem is not
available and request_firmware blocks.

However, the device does not accept the firmware on resume.
and it will exit with:

> firmware part 1 upload failed (-71).
> device is in a bad state. please reconnect it!

Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter 2009-04-18 17:12:18 +02:00 committed by John W. Linville
parent 18aaab15f9
commit e10a9dfc35
1 changed files with 90 additions and 20 deletions
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110
drivers/net/wireless/ar9170/usb.c
View File

@ -623,6 +623,39 @@ static int ar9170_usb_open(struct ar9170 *ar)
return 0;
}
static int ar9170_usb_init_device(struct ar9170_usb *aru)
{
int err;
err = ar9170_usb_alloc_rx_irq_urb(aru);
if (err)
goto err_out;
err = ar9170_usb_alloc_rx_bulk_urbs(aru);
if (err)
goto err_unrx;
err = ar9170_usb_upload_firmware(aru);
if (err) {
err = ar9170_echo_test(&aru->common, 0x60d43110);
if (err) {
/* force user invention, by disabling the device */
err = usb_driver_set_configuration(aru->udev, -1);
dev_err(&aru->udev->dev, "device is in a bad state. "
"please reconnect it!\n");
goto err_unrx;
}
}
return 0;
err_unrx:
ar9170_usb_cancel_urbs(aru);
err_out:
return err;
}
static int ar9170_usb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
@ -658,32 +691,16 @@ static int ar9170_usb_probe(struct usb_interface *intf,
err = ar9170_usb_reset(aru);
if (err)
goto err_unlock;
goto err_freehw;
err = ar9170_usb_request_firmware(aru);
if (err)
goto err_unlock;
goto err_freehw;
err = ar9170_usb_alloc_rx_irq_urb(aru);
err = ar9170_usb_init_device(aru);
if (err)
goto err_freefw;
err = ar9170_usb_alloc_rx_bulk_urbs(aru);
if (err)
goto err_unrx;
err = ar9170_usb_upload_firmware(aru);
if (err) {
err = ar9170_echo_test(&aru->common, 0x60d43110);
if (err) {
/* force user invention, by disabling the device */
err = usb_driver_set_configuration(aru->udev, -1);
dev_err(&aru->udev->dev, "device is in a bad state. "
"please reconnect it!\n");
goto err_unrx;
}
}
err = ar9170_usb_open(ar);
if (err)
goto err_unrx;
@ -703,7 +720,7 @@ static int ar9170_usb_probe(struct usb_interface *intf,
release_firmware(aru->init_values);
release_firmware(aru->firmware);
err_unlock:
err_freehw:
usb_set_intfdata(intf, NULL);
usb_put_dev(udev);
ieee80211_free_hw(ar->hw);
@ -730,12 +747,65 @@ static void ar9170_usb_disconnect(struct usb_interface *intf)
ieee80211_free_hw(aru->common.hw);
}
#ifdef CONFIG_PM
static int ar9170_suspend(struct usb_interface *intf,
pm_message_t message)
{
struct ar9170_usb *aru = usb_get_intfdata(intf);
if (!aru)
return -ENODEV;
aru->common.state = AR9170_IDLE;
ar9170_usb_cancel_urbs(aru);
return 0;
}
static int ar9170_resume(struct usb_interface *intf)
{
struct ar9170_usb *aru = usb_get_intfdata(intf);
int err;
if (!aru)
return -ENODEV;
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;
err = ar9170_usb_open(&aru->common);
if (err)
goto err_unrx;
return 0;
err_unrx:
aru->common.state = AR9170_IDLE;
ar9170_usb_cancel_urbs(aru);
return err;
}
#endif /* CONFIG_PM */
static struct usb_driver ar9170_driver = {
.name = "ar9170usb",
.probe = ar9170_usb_probe,
.disconnect = ar9170_usb_disconnect,
.id_table = ar9170_usb_ids,
.soft_unbind = 1,
#ifdef CONFIG_PM
.suspend = ar9170_suspend,
.resume = ar9170_resume,
#endif /* CONFIG_PM */
};
static int __init ar9170_init(void)