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: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c
index cee5feb..31665c5 100644
--- a/drivers/net/wireless/ath/ath9k/hif_usb.c
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
@@ -889,6 +889,26 @@
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 @@
}
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");