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Commit 62e4716a authored by Sujith's avatar Sujith Committed by John W. Linville
Browse files

ath9k_htc: Use USB reboot 



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: default avatarSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent f6689072

drivers/net/wireless/ath/ath9k/hif_usb.c

+21 −1
Original line number Diff line number Diff line
@@ -889,6 +889,26 @@ static int ath9k_hif_usb_probe(struct usb_interface *interface, 
	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");