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ath9k_htc: Use USB reboot

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So, apparently there is a USB reboot command
that the target accepts. Using this instead of
usb_reset_device() fixes the issue of "descriptor read error"
that pops up on repeated load/unload.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith 2010-04-23 10:28:16 +05:30 committed by John W. Linville
parent f66890724f
commit 62e4716aff
1 changed files with 21 additions and 1 deletions
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22
drivers/net/wireless/ath/ath9k/hif_usb.c
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@ -889,6 +889,26 @@ err_alloc:
return ret;
}
static void ath9k_hif_usb_reboot(struct usb_device *udev)
{
u32 reboot_cmd = 0xffffffff;
void *buf;
int ret;
buf = kmalloc(4, GFP_KERNEL);
if (!buf)
return;
memcpy(buf, &reboot_cmd, 4);
ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE),
buf, 4, NULL, HZ);
if (ret)
dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
kfree(buf);
}
static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
{
struct usb_device *udev = interface_to_usbdev(interface);
@ -903,7 +923,7 @@ static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
}
if (hif_dev->flags & HIF_USB_START)
usb_reset_device(udev);
ath9k_hif_usb_reboot(udev);
kfree(hif_dev);
dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");