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Commit 87d65e54 authored by Oliver Neukum's avatar Oliver Neukum Committed by Greg Kroah-Hartman
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USB: cdc-wdm cleanup 



- fixes an error with filling out control requests
- increases grepability and error logging
- fixes the short read code path

Signed-off-by: default avatarOliver Neukum <oneukum@suse.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 640c1bce

drivers/usb/class/cdc-wdm.c

+10 −6
Original line number Diff line number Diff line
@@ -28,8 +28,9 @@ 
/*

 * Version Information

 */

#define DRIVER_VERSION "v0.02"

#define DRIVER_VERSION "v0.03"

#define DRIVER_AUTHOR "Oliver Neukum"

#define DRIVER_DESC "USB Abstract Control Model driver for USB WCM Device Management"



static struct usb_device_id wdm_ids[] = {

	{
@@ -205,7 +206,7 @@ static void wdm_int_callback(struct urb *urb) 
	req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;

	req->wValue = 0;

	req->wIndex = desc->inum;

	req->wLength = cpu_to_le16(desc->bMaxPacketSize0);

	req->wLength = cpu_to_le16(desc->wMaxCommand);



	usb_fill_control_urb(

		desc->response,
@@ -214,7 +215,7 @@ static void wdm_int_callback(struct urb *urb) 
		usb_rcvctrlpipe(interface_to_usbdev(desc->intf), 0),

		(unsigned char *)req,

		desc->inbuf,

		desc->bMaxPacketSize0,

		desc->wMaxCommand,

		wdm_in_callback,

		desc

	);
@@ -266,7 +267,7 @@ static void cleanup(struct wdm_device *desc) 
			desc->sbuf,

			desc->validity->transfer_dma);

	usb_buffer_free(interface_to_usbdev(desc->intf),

			desc->wMaxPacketSize,

			desc->wMaxCommand,

			desc->inbuf,

			desc->response->transfer_dma);

	kfree(desc->orq);
@@ -347,6 +348,7 @@ static ssize_t wdm_write 
	if (rv < 0) {

		kfree(buf);

		clear_bit(WDM_IN_USE, &desc->flags);

		err("Tx URB error: %d", rv);

	} else {

		dev_dbg(&desc->intf->dev, "Tx URB has been submitted index=%d",

			req->wIndex);
@@ -418,6 +420,9 @@ static ssize_t wdm_read 
		desc->ubuf[i] = desc->ubuf[i + cntr];



	desc->length -= cntr;

	/* in case we had outstanding data */

	if (!desc->length)

		clear_bit(WDM_READ, &desc->flags);

	rv = cntr;



err:
@@ -735,6 +740,5 @@ module_init(wdm_init); 
module_exit(wdm_exit);



MODULE_AUTHOR(DRIVER_AUTHOR);

MODULE_DESCRIPTION("USB Abstract Control Model driver for "

		   "USB WCM Device Management");

MODULE_DESCRIPTION(DRIVER_DESC);

MODULE_LICENSE("GPL");