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@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/hif_usb.c | 13 ++++++++++++-
1 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c
index cee5feb..ce13e08 100644
--- a/drivers/net/wireless/ath/ath9k/hif_usb.c
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
@@ -889,6 +889,17 @@ err_alloc:
return ret;
}
+static void ath9k_hif_usb_reboot(struct usb_device *udev)
+{
+ u32 cmd = 0xffffffff;
+ int ret;
+
+ ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE),
+ &cmd, sizeof(cmd), NULL, HZ);
+ if (ret)
+ dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
+}
+
static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
{
struct usb_device *udev = interface_to_usbdev(interface);
@@ -903,7 +914,7 @@ 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");
--
1.7.0.5
--
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