USB: usbtest displays diagnostics again (28ffd79c) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/usb/misc/usbtest.c

+133 −143

Original line number	Diff line number	Diff line
		@@ -79,30 +79,10 @@ static struct usb_device testdev_to_usbdev (struct usbtest_dev test)
		/* set up all urbs so they can be used with either bulk or interrupt */
		#define INTERRUPT_RATE 1 /* msec/transfer */

		#define xprintk(tdev,level,fmt,args...) \
		dev_printk(level , &(tdev)->intf->dev , fmt , ## args)

		#ifdef DEBUG
		#define DBG(dev,fmt,args...) \
		xprintk(dev , KERN_DEBUG , fmt , ## args)
		#else
		#define DBG(dev,fmt,args...) \
		do { } while (0)
		#endif /* DEBUG */

		#ifdef VERBOSE
		#define VDBG DBG
		#else
		#define VDBG(dev,fmt,args...) \
		do { } while (0)
		#endif /* VERBOSE */

		#define ERROR(dev,fmt,args...) \
		xprintk(dev , KERN_ERR , fmt , ## args)
		#define WARN(dev,fmt,args...) \
		xprintk(dev , KERN_WARNING , fmt , ## args)
		#define INFO(dev,fmt,args...) \
		xprintk(dev , KERN_INFO , fmt , ## args)
		#define ERROR(tdev, fmt, args...) \
		dev_err(&(tdev)->intf->dev , fmt , ## args)
		#define WARN(tdev, fmt, args...) \
		dev_warn(&(tdev)->intf->dev , fmt , ## args)

		/-------------------------------------------------------------------------/

		@@ -236,7 +216,7 @@ static struct urb *simple_alloc_urb (

		static unsigned pattern = 0;
		module_param (pattern, uint, S_IRUGO);
		// MODULE_PARM_DESC (pattern, "i/o pattern (0 == zeroes)");
		MODULE_PARM_DESC(pattern, "i/o pattern (0 == zeroes)");

		static inline void simple_fill_buf (struct urb *urb)
		{
		@@ -257,7 +237,7 @@ static inline void simple_fill_buf (struct urb *urb)
		}
		}

		static inline int simple_check_buf (struct urb *urb)
		static inline int simple_check_buf(struct usbtest_dev tdev, struct urb urb)
		{
		unsigned i;
		u8 expected;
		@@ -285,7 +265,7 @@ static inline int simple_check_buf (struct urb *urb)
		}
		if (*buf == expected)
		continue;
		dbg ("buf[%d] = %d (not %d)", i, *buf, expected);
		ERROR(tdev, "buf[%d] = %d (not %d)\n", i, *buf, expected);
		return -EINVAL;
		}
		return 0;
		@@ -299,6 +279,7 @@ static void simple_free_urb (struct urb *urb)
		}

		static int simple_io (
		struct usbtest_dev *tdev,
		struct urb *urb,
		int iterations,
		int vary,
		@@ -324,7 +305,7 @@ static int simple_io (
		retval = urb->status;
		urb->dev = udev;
		if (retval == 0 && usb_pipein (urb->pipe))
		retval = simple_check_buf (urb);
		retval = simple_check_buf(tdev, urb);

		if (vary) {
		int len = urb->transfer_buffer_length;
		@@ -341,7 +322,7 @@ static int simple_io (
		urb->transfer_buffer_length = max;

		if (expected != retval)
		dev_dbg (&udev->dev,
		dev_err(&udev->dev,
		"%s failed, iterations left %d, status %d (not %d)\n",
		label, iterations, retval, expected);
		return retval;
		@@ -415,7 +396,7 @@ alloc_sglist (int nents, int max, int vary)
		}

		static int perform_sglist (
		struct usb_device *udev,
		struct usbtest_dev *tdev,
		unsigned iterations,
		int pipe,
		struct usb_sg_request *req,
		@@ -423,6 +404,7 @@ static int perform_sglist (
		int nents
		)
		{
		struct usb_device *udev = testdev_to_usbdev(tdev);
		int retval = 0;

		while (retval == 0 && iterations-- > 0) {
		@@ -446,7 +428,8 @@ static int perform_sglist (
		// failure if retval is as we expected ...

		if (retval)
		dbg ("perform_sglist failed, iterations left %d, status %d",
		ERROR(tdev, "perform_sglist failed, "
		"iterations left %d, status %d\n",
		iterations, retval);
		return retval;
		}
		@@ -505,28 +488,28 @@ static int set_altsetting (struct usbtest_dev *dev, int alternate)
		alternate);
		}

		static int is_good_config (char *buf, int len)
		static int is_good_config(struct usbtest_dev *tdev, int len)
		{
		struct usb_config_descriptor *config;

		if (len < sizeof *config)
		return 0;
		config = (struct usb_config_descriptor *) buf;
		config = (struct usb_config_descriptor *) tdev->buf;

		switch (config->bDescriptorType) {
		case USB_DT_CONFIG:
		case USB_DT_OTHER_SPEED_CONFIG:
		if (config->bLength != 9) {
		dbg ("bogus config descriptor length");
		ERROR(tdev, "bogus config descriptor length\n");
		return 0;
		}
		/* this bit 'must be 1' but often isn't */
		if (!realworld && !(config->bmAttributes & 0x80)) {
		dbg ("high bit of config attributes not set");
		ERROR(tdev, "high bit of config attributes not set\n");
		return 0;
		}
		if (config->bmAttributes & 0x1f) { /* reserved == 0 */
		dbg ("reserved config bits set");
		ERROR(tdev, "reserved config bits set\n");
		return 0;
		}
		break;
		@@ -538,7 +521,7 @@ static int is_good_config (char *buf, int len)
		return 1;
		if (le16_to_cpu(config->wTotalLength) >= TBUF_SIZE) /* max partial read */
		return 1;
		dbg ("bogus config descriptor read size");
		ERROR(tdev, "bogus config descriptor read size\n");
		return 0;
		}

		@@ -571,7 +554,7 @@ static int ch9_postconfig (struct usbtest_dev *dev)
		/* 9.2.3 constrains the range here */
		alt = iface->altsetting [i].desc.bAlternateSetting;
		if (alt < 0 \|\| alt >= iface->num_altsetting) {
		dev_dbg (&iface->dev,
		dev_err(&iface->dev,
		"invalid alt [%d].bAltSetting = %d\n",
		i, alt);
		}
		@@ -583,7 +566,7 @@ static int ch9_postconfig (struct usbtest_dev *dev)
		/* [9.4.10] set_interface */
		retval = set_altsetting (dev, alt);
		if (retval) {
		dev_dbg (&iface->dev, "can't set_interface = %d, %d\n",
		dev_err(&iface->dev, "can't set_interface = %d, %d\n",
		alt, retval);
		return retval;
		}
		@@ -591,7 +574,7 @@ static int ch9_postconfig (struct usbtest_dev *dev)
		/* [9.4.4] get_interface always works */
		retval = get_altsetting (dev);
		if (retval != alt) {
		dev_dbg (&iface->dev, "get alt should be %d, was %d\n",
		dev_err(&iface->dev, "get alt should be %d, was %d\n",
		alt, retval);
		return (retval < 0) ? retval : -EDOM;
		}
		@@ -611,7 +594,7 @@ static int ch9_postconfig (struct usbtest_dev *dev)
		USB_DIR_IN \| USB_RECIP_DEVICE,
		0, 0, dev->buf, 1, USB_CTRL_GET_TIMEOUT);
		if (retval != 1 \|\| dev->buf [0] != expected) {
		dev_dbg (&iface->dev, "get config --> %d %d (1 %d)\n",
		dev_err(&iface->dev, "get config --> %d %d (1 %d)\n",
		retval, dev->buf[0], expected);
		return (retval < 0) ? retval : -EDOM;
		}
		@@ -621,7 +604,7 @@ static int ch9_postconfig (struct usbtest_dev *dev)
		retval = usb_get_descriptor (udev, USB_DT_DEVICE, 0,
		dev->buf, sizeof udev->descriptor);
		if (retval != sizeof udev->descriptor) {
		dev_dbg (&iface->dev, "dev descriptor --> %d\n", retval);
		dev_err(&iface->dev, "dev descriptor --> %d\n", retval);
		return (retval < 0) ? retval : -EDOM;
		}

		@@ -629,8 +612,8 @@ static int ch9_postconfig (struct usbtest_dev *dev)
		for (i = 0; i < udev->descriptor.bNumConfigurations; i++) {
		retval = usb_get_descriptor (udev, USB_DT_CONFIG, i,
		dev->buf, TBUF_SIZE);
		if (!is_good_config (dev->buf, retval)) {
		dev_dbg (&iface->dev,
		if (!is_good_config(dev, retval)) {
		dev_err(&iface->dev,
		"config [%d] descriptor --> %d\n",
		i, retval);
		return (retval < 0) ? retval : -EDOM;
		@@ -650,14 +633,14 @@ static int ch9_postconfig (struct usbtest_dev *dev)
		sizeof (struct usb_qualifier_descriptor));
		if (retval == -EPIPE) {
		if (udev->speed == USB_SPEED_HIGH) {
		dev_dbg (&iface->dev,
		dev_err(&iface->dev,
		"hs dev qualifier --> %d\n",
		retval);
		return (retval < 0) ? retval : -EDOM;
		}
		/* usb2.0 but not high-speed capable; fine */
		} else if (retval != sizeof (struct usb_qualifier_descriptor)) {
		dev_dbg (&iface->dev, "dev qualifier --> %d\n", retval);
		dev_err(&iface->dev, "dev qualifier --> %d\n", retval);
		return (retval < 0) ? retval : -EDOM;
		} else
		d = (struct usb_qualifier_descriptor *) dev->buf;
		@@ -669,8 +652,8 @@ static int ch9_postconfig (struct usbtest_dev *dev)
		retval = usb_get_descriptor (udev,
		USB_DT_OTHER_SPEED_CONFIG, i,
		dev->buf, TBUF_SIZE);
		if (!is_good_config (dev->buf, retval)) {
		dev_dbg (&iface->dev,
		if (!is_good_config(dev, retval)) {
		dev_err(&iface->dev,
		"other speed config --> %d\n",
		retval);
		return (retval < 0) ? retval : -EDOM;
		@@ -683,7 +666,7 @@ static int ch9_postconfig (struct usbtest_dev *dev)
		/* [9.4.5] get_status always works */
		retval = usb_get_status (udev, USB_RECIP_DEVICE, 0, dev->buf);
		if (retval != 2) {
		dev_dbg (&iface->dev, "get dev status --> %d\n", retval);
		dev_err(&iface->dev, "get dev status --> %d\n", retval);
		return (retval < 0) ? retval : -EDOM;
		}

		@@ -693,7 +676,7 @@ static int ch9_postconfig (struct usbtest_dev *dev)
		retval = usb_get_status (udev, USB_RECIP_INTERFACE,
		iface->altsetting [0].desc.bInterfaceNumber, dev->buf);
		if (retval != 2) {
		dev_dbg (&iface->dev, "get interface status --> %d\n", retval);
		dev_err(&iface->dev, "get interface status --> %d\n", retval);
		return (retval < 0) ? retval : -EDOM;
		}
		// FIXME get status for each endpoint in the interface
		@@ -752,7 +735,8 @@ static void ctrl_complete (struct urb *urb)
		*/
		if (subcase->number > 0) {
		if ((subcase->number - ctx->last) != 1) {
		dbg ("subcase %d completed out of order, last %d",
		ERROR(ctx->dev,
		"subcase %d completed out of order, last %d\n",
		subcase->number, ctx->last);
		status = -EDOM;
		ctx->last = subcase->number;
		@@ -777,7 +761,7 @@ static void ctrl_complete (struct urb *urb)
		else if (subcase->number == 12 && status == -EPIPE)
		status = 0;
		else
		dbg ("subtest %d error, status %d",
		ERROR(ctx->dev, "subtest %d error, status %d\n",
		subcase->number, status);
		}

		@@ -788,9 +772,12 @@ static void ctrl_complete (struct urb *urb)
		int i;

		ctx->status = status;
		info ("control queue %02x.%02x, err %d, %d left",
		ERROR(ctx->dev, "control queue %02x.%02x, err %d, "
		"%d left, subcase %d, len %d/%d\n",
		reqp->bRequestType, reqp->bRequest,
		status, ctx->count);
		status, ctx->count, subcase->number,
		urb->actual_length,
		urb->transfer_buffer_length);

		/* FIXME this "unlink everything" exit route should
		* be a separate test case.
		@@ -799,7 +786,8 @@ static void ctrl_complete (struct urb *urb)
		/* unlink whatever's still pending */
		for (i = 1; i < ctx->param->sglen; i++) {
		struct urb *u = ctx->urb [
		(i + subcase->number) % ctx->param->sglen];
		(i + subcase->number)
		% ctx->param->sglen];

		if (u == urb \|\| !u->dev)
		continue;
		@@ -812,7 +800,8 @@ static void ctrl_complete (struct urb *urb)
		case -EIDRM:
		continue;
		default:
		dbg ("urb unlink --> %d", status);
		ERROR(ctx->dev, "urb unlink --> %d\n",
		status);
		}
		}
		status = ctx->status;
		@@ -822,7 +811,8 @@ static void ctrl_complete (struct urb *urb)
		/* resubmit if we need to, else mark this as done */
		if ((status == 0) && (ctx->pending < ctx->count)) {
		if ((status = usb_submit_urb (urb, GFP_ATOMIC)) != 0) {
		dbg ("can't resubmit ctrl %02x.%02x, err %d",
		ERROR(ctx->dev,
		"can't resubmit ctrl %02x.%02x, err %d\n",
		reqp->bRequestType, reqp->bRequest, status);
		urb->dev = NULL;
		} else
		@@ -918,11 +908,11 @@ test_ctrl_queue (struct usbtest_dev dev, struct usbtest_param param)
		req.wValue = cpu_to_le16 (USB_DT_INTERFACE << 8);
		// interface == 0
		len = sizeof (struct usb_interface_descriptor);
		expected = EPIPE;
		expected = -EPIPE;
		break;
		// NOTE: two consecutive stalls in the queue here.
		// that tests fault recovery a bit more aggressively.
		case 8: // clear endpoint halt (USUALLY STALLS)
		case 8: // clear endpoint halt (MAY STALL)
		req.bRequest = USB_REQ_CLEAR_FEATURE;
		req.bRequestType = USB_RECIP_ENDPOINT;
		// wValue 0 == ep halt
		@@ -965,7 +955,7 @@ test_ctrl_queue (struct usbtest_dev dev, struct usbtest_param param)
		break;
		case 14: // short read; try to fill the last packet
		req.wValue = cpu_to_le16 ((USB_DT_DEVICE << 8) \| 0);
		// device descriptor size == 18 bytes
		/* device descriptor size == 18 bytes */
		len = udev->descriptor.bMaxPacketSize0;
		switch (len) {
		case 8: len = 24; break;
		@@ -974,7 +964,7 @@ test_ctrl_queue (struct usbtest_dev dev, struct usbtest_param param)
		expected = -EREMOTEIO;
		break;
		default:
		err ("bogus number of ctrl queue testcases!");
		ERROR(dev, "bogus number of ctrl queue testcases!\n");
		context.status = -EINVAL;
		goto cleanup;
		}
		@@ -1003,7 +993,7 @@ test_ctrl_queue (struct usbtest_dev dev, struct usbtest_param param)
		for (i = 0; i < param->sglen; i++) {
		context.status = usb_submit_urb (urb [i], GFP_ATOMIC);
		if (context.status != 0) {
		dbg ("can't submit urb[%d], status %d",
		ERROR(dev, "can't submit urb[%d], status %d\n",
		i, context.status);
		context.count = context.pending;
		break;
		@@ -1070,7 +1060,7 @@ static int unlink1 (struct usbtest_dev *dev, int pipe, int size, int async)
		* due to errors, or is just NAKing requests.
		*/
		if ((retval = usb_submit_urb (urb, GFP_KERNEL)) != 0) {
		dev_dbg (&dev->intf->dev, "submit fail %d\n", retval);
		dev_err(&dev->intf->dev, "submit fail %d\n", retval);
		return retval;
		}

		@@ -1087,13 +1077,13 @@ static int unlink1 (struct usbtest_dev *dev, int pipe, int size, int async)
		* "normal" drivers would prevent resubmission, but
		* since we're testing unlink paths, we can't.
		*/
		dev_dbg (&dev->intf->dev, "unlink retry\n");
		ERROR(dev, "unlink retry\n");
		goto retry;
		}
		} else
		usb_kill_urb (urb);
		if (!(retval == 0 \|\| retval == -EINPROGRESS)) {
		dev_dbg (&dev->intf->dev, "unlink fail %d\n", retval);
		dev_err(&dev->intf->dev, "unlink fail %d\n", retval);
		return retval;
		}

		@@ -1121,7 +1111,7 @@ static int unlink_simple (struct usbtest_dev *dev, int pipe, int len)

		/-------------------------------------------------------------------------/

		static int verify_not_halted (int ep, struct urb *urb)
		static int verify_not_halted(struct usbtest_dev tdev, int ep, struct urb urb)
		{
		int retval;
		u16 status;
		@@ -1129,20 +1119,21 @@ static int verify_not_halted (int ep, struct urb *urb)
		/* shouldn't look or act halted */
		retval = usb_get_status (urb->dev, USB_RECIP_ENDPOINT, ep, &status);
		if (retval < 0) {
		dbg ("ep %02x couldn't get no-halt status, %d", ep, retval);
		ERROR(tdev, "ep %02x couldn't get no-halt status, %d\n",
		ep, retval);
		return retval;
		}
		if (status != 0) {
		dbg ("ep %02x bogus status: %04x != 0", ep, status);
		ERROR(tdev, "ep %02x bogus status: %04x != 0\n", ep, status);
		return -EINVAL;
		}
		retval = simple_io (urb, 1, 0, 0, __func__);
		retval = simple_io(tdev, urb, 1, 0, 0, __func__);
		if (retval != 0)
		return -EINVAL;
		return 0;
		}

		static int verify_halted (int ep, struct urb *urb)
		static int verify_halted(struct usbtest_dev tdev, int ep, struct urb urb)
		{
		int retval;
		u16 status;
		@@ -1150,29 +1141,30 @@ static int verify_halted (int ep, struct urb *urb)
		/* should look and act halted */
		retval = usb_get_status (urb->dev, USB_RECIP_ENDPOINT, ep, &status);
		if (retval < 0) {
		dbg ("ep %02x couldn't get halt status, %d", ep, retval);
		ERROR(tdev, "ep %02x couldn't get halt status, %d\n",
		ep, retval);
		return retval;
		}
		le16_to_cpus(&status);
		if (status != 1) {
		dbg ("ep %02x bogus status: %04x != 1", ep, status);
		ERROR(tdev, "ep %02x bogus status: %04x != 1\n", ep, status);
		return -EINVAL;
		}
		retval = simple_io (urb, 1, 0, -EPIPE, __func__);
		retval = simple_io(tdev, urb, 1, 0, -EPIPE, __func__);
		if (retval != -EPIPE)
		return -EINVAL;
		retval = simple_io (urb, 1, 0, -EPIPE, "verify_still_halted");
		retval = simple_io(tdev, urb, 1, 0, -EPIPE, "verify_still_halted");
		if (retval != -EPIPE)
		return -EINVAL;
		return 0;
		}

		static int test_halt (int ep, struct urb *urb)
		static int test_halt(struct usbtest_dev tdev, int ep, struct urb urb)
		{
		int retval;

		/* shouldn't look or act halted now */
		retval = verify_not_halted (ep, urb);
		retval = verify_not_halted(tdev, ep, urb);
		if (retval < 0)
		return retval;

		@@ -1182,20 +1174,20 @@ static int test_halt (int ep, struct urb *urb)
		USB_ENDPOINT_HALT, ep,
		NULL, 0, USB_CTRL_SET_TIMEOUT);
		if (retval < 0) {
		dbg ("ep %02x couldn't set halt, %d", ep, retval);
		ERROR(tdev, "ep %02x couldn't set halt, %d\n", ep, retval);
		return retval;
		}
		retval = verify_halted (ep, urb);
		retval = verify_halted(tdev, ep, urb);
		if (retval < 0)
		return retval;

		/* clear halt (tests API + protocol), verify it worked */
		retval = usb_clear_halt (urb->dev, urb->pipe);
		if (retval < 0) {
		dbg ("ep %02x couldn't clear halt, %d", ep, retval);
		ERROR(tdev, "ep %02x couldn't clear halt, %d\n", ep, retval);
		return retval;
		}
		retval = verify_not_halted (ep, urb);
		retval = verify_not_halted(tdev, ep, urb);
		if (retval < 0)
		return retval;

		@@ -1217,7 +1209,7 @@ static int halt_simple (struct usbtest_dev *dev)
		if (dev->in_pipe) {
		ep = usb_pipeendpoint (dev->in_pipe) \| USB_DIR_IN;
		urb->pipe = dev->in_pipe;
		retval = test_halt (ep, urb);
		retval = test_halt(dev, ep, urb);
		if (retval < 0)
		goto done;
		}
		@@ -1225,7 +1217,7 @@ static int halt_simple (struct usbtest_dev *dev)
		if (dev->out_pipe) {
		ep = usb_pipeendpoint (dev->out_pipe);
		urb->pipe = dev->out_pipe;
		retval = test_halt (ep, urb);
		retval = test_halt(dev, ep, urb);
		}
		done:
		simple_free_urb (urb);
		@@ -1275,7 +1267,7 @@ static int ctrl_out (struct usbtest_dev *dev,
		if (retval != len) {
		what = "write";
		if (retval >= 0) {
		INFO(dev, "ctrl_out, wlen %d (expected %d)\n",
		ERROR(dev, "ctrl_out, wlen %d (expected %d)\n",
		retval, len);
		retval = -EBADMSG;
		}
		@@ -1289,7 +1281,7 @@ static int ctrl_out (struct usbtest_dev *dev,
		if (retval != len) {
		what = "read";
		if (retval >= 0) {
		INFO(dev, "ctrl_out, rlen %d (expected %d)\n",
		ERROR(dev, "ctrl_out, rlen %d (expected %d)\n",
		retval, len);
		retval = -EBADMSG;
		}
		@@ -1299,7 +1291,7 @@ static int ctrl_out (struct usbtest_dev *dev,
		/* fail if we can't verify */
		for (j = 0; j < len; j++) {
		if (buf [j] != (u8) (i + j)) {
		INFO (dev, "ctrl_out, byte %d is %d not %d\n",
		ERROR(dev, "ctrl_out, byte %d is %d not %d\n",
		j, buf [j], (u8) i + j);
		retval = -EBADMSG;
		break;
		@@ -1321,7 +1313,7 @@ static int ctrl_out (struct usbtest_dev *dev,
		}

		if (retval < 0)
		INFO (dev, "ctrl_out %s failed, code %d, count %d\n",
		ERROR (dev, "ctrl_out %s failed, code %d, count %d\n",
		what, retval, i);

		kfree (buf);
		@@ -1366,7 +1358,7 @@ static void iso_callback (struct urb *urb)
		case 0:
		goto done;
		default:
		dev_dbg (&ctx->dev->intf->dev,
		dev_err(&ctx->dev->intf->dev,
		"iso resubmit err %d\n",
		status);
		/* FALLTHROUGH */
		@@ -1381,7 +1373,7 @@ static void iso_callback (struct urb *urb)
		ctx->pending--;
		if (ctx->pending == 0) {
		if (ctx->errors)
		dev_dbg (&ctx->dev->intf->dev,
		dev_err(&ctx->dev->intf->dev,
		"iso test, %lu errors out of %lu\n",
		ctx->errors, ctx->packet_count);
		complete (&ctx->done);
		@@ -1458,7 +1450,7 @@ test_iso_queue (struct usbtest_dev dev, struct usbtest_param param,

		memset (urbs, 0, sizeof urbs);
		udev = testdev_to_usbdev (dev);
		dev_dbg (&dev->intf->dev,
		dev_info(&dev->intf->dev,
		"... iso period %d %sframes, wMaxPacket %04x\n",
		1 << (desc->bInterval - 1),
		(udev->speed == USB_SPEED_HIGH) ? "micro" : "",
		@@ -1475,7 +1467,7 @@ test_iso_queue (struct usbtest_dev dev, struct usbtest_param param,
		urbs [i]->context = &context;
		}
		packets *= param->iterations;
		dev_dbg (&dev->intf->dev,
		dev_info(&dev->intf->dev,
		"... total %lu msec (%lu packets)\n",
		(packets * (1 << (desc->bInterval - 1)))
		/ ((udev->speed == USB_SPEED_HIGH) ? 8 : 1),
		@@ -1537,6 +1529,13 @@ test_iso_queue (struct usbtest_dev dev, struct usbtest_param param,
		* except indirectly by consuming USB bandwidth and CPU resources for test
		* threads and request completion. But the only way to know that for sure
		* is to test when HC queues are in use by many devices.
		*
		* WARNING: Because usbfs grabs udev->dev.sem before calling this ioctl(),
		* it locks out usbcore in certain code paths. Notably, if you disconnect
		* the device-under-test, khubd will wait block forever waiting for the
		* ioctl to complete ... so that usb_disconnect() can abort the pending
		* urbs and then call usbtest_disconnect(). To abort a test, you're best
		* off just killing the userspace task and waiting for it to exit.
		*/

		static int
		@@ -1604,7 +1603,7 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		switch (param->test_num) {

		case 0:
		dev_dbg (&intf->dev, "TEST 0: NOP\n");
		dev_info(&intf->dev, "TEST 0: NOP\n");
		retval = 0;
		break;

		@@ -1612,7 +1611,7 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		case 1:
		if (dev->out_pipe == 0)
		break;
		dev_dbg (&intf->dev,
		dev_info(&intf->dev,
		"TEST 1: write %d bytes %u times\n",
		param->length, param->iterations);
		urb = simple_alloc_urb (udev, dev->out_pipe, param->length);
		@@ -1621,13 +1620,13 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		break;
		}
		// FIRMWARE: bulk sink (maybe accepts short writes)
		retval = simple_io (urb, param->iterations, 0, 0, "test1");
		retval = simple_io(dev, urb, param->iterations, 0, 0, "test1");
		simple_free_urb (urb);
		break;
		case 2:
		if (dev->in_pipe == 0)
		break;
		dev_dbg (&intf->dev,
		dev_info(&intf->dev,
		"TEST 2: read %d bytes %u times\n",
		param->length, param->iterations);
		urb = simple_alloc_urb (udev, dev->in_pipe, param->length);
		@@ -1636,13 +1635,13 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		break;
		}
		// FIRMWARE: bulk source (maybe generates short writes)
		retval = simple_io (urb, param->iterations, 0, 0, "test2");
		retval = simple_io(dev, urb, param->iterations, 0, 0, "test2");
		simple_free_urb (urb);
		break;
		case 3:
		if (dev->out_pipe == 0 \|\| param->vary == 0)
		break;
		dev_dbg (&intf->dev,
		dev_info(&intf->dev,
		"TEST 3: write/%d 0..%d bytes %u times\n",
		param->vary, param->length, param->iterations);
		urb = simple_alloc_urb (udev, dev->out_pipe, param->length);
		@@ -1651,14 +1650,14 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		break;
		}
		// FIRMWARE: bulk sink (maybe accepts short writes)
		retval = simple_io (urb, param->iterations, param->vary,
		retval = simple_io(dev, urb, param->iterations, param->vary,
		0, "test3");
		simple_free_urb (urb);
		break;
		case 4:
		if (dev->in_pipe == 0 \|\| param->vary == 0)
		break;
		dev_dbg (&intf->dev,
		dev_info(&intf->dev,
		"TEST 4: read/%d 0..%d bytes %u times\n",
		param->vary, param->length, param->iterations);
		urb = simple_alloc_urb (udev, dev->in_pipe, param->length);
		@@ -1667,7 +1666,7 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		break;
		}
		// FIRMWARE: bulk source (maybe generates short writes)
		retval = simple_io (urb, param->iterations, param->vary,
		retval = simple_io(dev, urb, param->iterations, param->vary,
		0, "test4");
		simple_free_urb (urb);
		break;
		@@ -1676,7 +1675,7 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		case 5:
		if (dev->out_pipe == 0 \|\| param->sglen == 0)
		break;
		dev_dbg (&intf->dev,
		dev_info(&intf->dev,
		"TEST 5: write %d sglists %d entries of %d bytes\n",
		param->iterations,
		param->sglen, param->length);
		@@ -1686,7 +1685,7 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		break;
		}
		// FIRMWARE: bulk sink (maybe accepts short writes)
		retval = perform_sglist (udev, param->iterations, dev->out_pipe,
		retval = perform_sglist(dev, param->iterations, dev->out_pipe,
		&req, sg, param->sglen);
		free_sglist (sg, param->sglen);
		break;
		@@ -1694,7 +1693,7 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		case 6:
		if (dev->in_pipe == 0 \|\| param->sglen == 0)
		break;
		dev_dbg (&intf->dev,
		dev_info(&intf->dev,
		"TEST 6: read %d sglists %d entries of %d bytes\n",
		param->iterations,
		param->sglen, param->length);
		@@ -1704,14 +1703,14 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		break;
		}
		// FIRMWARE: bulk source (maybe generates short writes)
		retval = perform_sglist (udev, param->iterations, dev->in_pipe,
		retval = perform_sglist(dev, param->iterations, dev->in_pipe,
		&req, sg, param->sglen);
		free_sglist (sg, param->sglen);
		break;
		case 7:
		if (dev->out_pipe == 0 \|\| param->sglen == 0 \|\| param->vary == 0)
		break;
		dev_dbg (&intf->dev,
		dev_info(&intf->dev,
		"TEST 7: write/%d %d sglists %d entries 0..%d bytes\n",
		param->vary, param->iterations,
		param->sglen, param->length);
		@@ -1721,14 +1720,14 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		break;
		}
		// FIRMWARE: bulk sink (maybe accepts short writes)
		retval = perform_sglist (udev, param->iterations, dev->out_pipe,
		retval = perform_sglist(dev, param->iterations, dev->out_pipe,
		&req, sg, param->sglen);
		free_sglist (sg, param->sglen);
		break;
		case 8:
		if (dev->in_pipe == 0 \|\| param->sglen == 0 \|\| param->vary == 0)
		break;
		dev_dbg (&intf->dev,
		dev_info(&intf->dev,
		"TEST 8: read/%d %d sglists %d entries 0..%d bytes\n",
		param->vary, param->iterations,
		param->sglen, param->length);
		@@ -1738,7 +1737,7 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		break;
		}
		// FIRMWARE: bulk source (maybe generates short writes)
		retval = perform_sglist (udev, param->iterations, dev->in_pipe,
		retval = perform_sglist(dev, param->iterations, dev->in_pipe,
		&req, sg, param->sglen);
		free_sglist (sg, param->sglen);
		break;
		@@ -1746,13 +1745,14 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		/* non-queued sanity tests for control (chapter 9 subset) */
		case 9:
		retval = 0;
		dev_dbg (&intf->dev,
		dev_info(&intf->dev,
		"TEST 9: ch9 (subset) control tests, %d times\n",
		param->iterations);
		for (i = param->iterations; retval == 0 && i--; /* NOP */)
		retval = ch9_postconfig (dev);
		if (retval)
		dbg ("ch9 subset failed, iterations left %d", i);
		dev_err(&intf->dev, "ch9 subset failed, "
		"iterations left %d\n", i);
		break;

		/* queued control messaging */
		@@ -1760,7 +1760,7 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		if (param->sglen == 0)
		break;
		retval = 0;
		dev_dbg (&intf->dev,
		dev_info(&intf->dev,
		"TEST 10: queue %d control calls, %d times\n",
		param->sglen,
		param->iterations);
		@@ -1772,26 +1772,26 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		if (dev->in_pipe == 0 \|\| !param->length)
		break;
		retval = 0;
		dev_dbg (&intf->dev, "TEST 11: unlink %d reads of %d\n",
		dev_info(&intf->dev, "TEST 11: unlink %d reads of %d\n",
		param->iterations, param->length);
		for (i = param->iterations; retval == 0 && i--; /* NOP */)
		retval = unlink_simple (dev, dev->in_pipe,
		param->length);
		if (retval)
		dev_dbg (&intf->dev, "unlink reads failed %d, "
		dev_err(&intf->dev, "unlink reads failed %d, "
		"iterations left %d\n", retval, i);
		break;
		case 12:
		if (dev->out_pipe == 0 \|\| !param->length)
		break;
		retval = 0;
		dev_dbg (&intf->dev, "TEST 12: unlink %d writes of %d\n",
		dev_info(&intf->dev, "TEST 12: unlink %d writes of %d\n",
		param->iterations, param->length);
		for (i = param->iterations; retval == 0 && i--; /* NOP */)
		retval = unlink_simple (dev, dev->out_pipe,
		param->length);
		if (retval)
		dev_dbg (&intf->dev, "unlink writes failed %d, "
		dev_err(&intf->dev, "unlink writes failed %d, "
		"iterations left %d\n", retval, i);
		break;

		@@ -1800,20 +1800,20 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		if (dev->out_pipe == 0 && dev->in_pipe == 0)
		break;
		retval = 0;
		dev_dbg (&intf->dev, "TEST 13: set/clear %d halts\n",
		dev_info(&intf->dev, "TEST 13: set/clear %d halts\n",
		param->iterations);
		for (i = param->iterations; retval == 0 && i--; /* NOP */)
		retval = halt_simple (dev);

		if (retval)
		DBG (dev, "halts failed, iterations left %d\n", i);
		ERROR(dev, "halts failed, iterations left %d\n", i);
		break;

		/* control write tests */
		case 14:
		if (!dev->info->ctrl_out)
		break;
		dev_dbg (&intf->dev, "TEST 14: %d ep0out, %d..%d vary %d\n",
		dev_info(&intf->dev, "TEST 14: %d ep0out, %d..%d vary %d\n",
		param->iterations,
		realworld ? 1 : 0, param->length,
		param->vary);
		@@ -1825,7 +1825,7 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		case 15:
		if (dev->out_iso_pipe == 0 \|\| param->sglen == 0)
		break;
		dev_dbg (&intf->dev,
		dev_info(&intf->dev,
		"TEST 15: write %d iso, %d entries of %d bytes\n",
		param->iterations,
		param->sglen, param->length);
		@@ -1838,7 +1838,7 @@ usbtest_ioctl (struct usb_interface intf, unsigned int code, void buf)
		case 16:
		if (dev->in_iso_pipe == 0 \|\| param->sglen == 0)
		break;
		dev_dbg (&intf->dev,
		dev_info(&intf->dev,
		"TEST 16: read %d iso, %d entries of %d bytes\n",
		param->iterations,
		param->sglen, param->length);
		@@ -1898,7 +1898,8 @@ usbtest_probe (struct usb_interface intf, const struct usb_device_id id)
		return -ENODEV;
		if (product && le16_to_cpu(udev->descriptor.idProduct) != (u16)product)
		return -ENODEV;
		dbg ("matched module params, vend=0x%04x prod=0x%04x",
		dev_info(&intf->dev, "matched module params, "
		"vend=0x%04x prod=0x%04x\n",
		le16_to_cpu(udev->descriptor.idVendor),
		le16_to_cpu(udev->descriptor.idProduct));
		}
		@@ -1940,7 +1941,8 @@ usbtest_probe (struct usb_interface intf, const struct usb_device_id id)

		status = get_endpoints (dev, intf);
		if (status < 0) {
		dbg ("couldn't get endpoints, %d\n", status);
		WARN(dev, "couldn't get endpoints, %d\n",
		status);
		return status;
		}
		/* may find bulk or ISO pipes */
		@@ -2082,21 +2084,9 @@ static struct usbtest_info generic_info = {
		};
		#endif

		// FIXME remove this
		static struct usbtest_info hact_info = {
		.name = "FX2/hact",
		//.ep_in = 6,
		.ep_out = 2,
		.alt = -1,
		};


		static struct usb_device_id id_table [] = {

		{ USB_DEVICE (0x0547, 0x1002),
		.driver_info = (unsigned long) &hact_info,
		},

		/-------------------------------------------------------------/

		/* EZ-USB devices which download firmware to replace (or in our
		@@ -2185,7 +2175,7 @@ static int __init usbtest_init (void)
		{
		#ifdef GENERIC
		if (vendor)
		dbg ("params: vend=0x%04x prod=0x%04x", vendor, product);
		pr_debug("params: vend=0x%04x prod=0x%04x\n", vendor, product);
		#endif
		return usb_register (&usbtest_driver);
		}