From 62e4716aff31a8ab687016680443012034734c92 Mon Sep 17 00:00:00 2001 From: Sujith Date: Fri, 23 Apr 2010 10:28:16 +0530 Subject: [PATCH] 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 Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/hif_usb.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c index cee5febb8a4d..31665c5ad907 100644 --- a/drivers/net/wireless/ath/ath9k/hif_usb.c +++ b/drivers/net/wireless/ath/ath9k/hif_usb.c @@ -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"); -- 2.20.1