usb: devio: update max count of DPs per interval for ISOC (8a1dbc8d) · Commits · 戴 / test

The failure happened when I tried to send up to 96DPs per an interval for SSP ISOC transations by libusb, this is used to verify SSP ISOC function of USB3 GEN2 controller, so update it as 96DPs. (refer usb3.1r1.0 section 8.12.6 Isochronous Transactions) Signed-off-by:

Chunfeng Yun <chunfeng.yun@mediatek.com> Signed-off-by:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/core/devio.c

+3 −5

Original line number	Diff line number	Diff line
		@@ -1564,12 +1564,10 @@ static int proc_do_submiturb(struct usb_dev_state ps, struct usbdevfs_urb uurb
		}
		for (totlen = u = 0; u < number_of_packets; u++) {
		/*
		* arbitrary limit need for USB 3.0
		* bMaxBurst (0~15 allowed, 1~16 packets)
		* bmAttributes (bit 1:0, mult 0~2, 1~3 packets)
		* sizemax: 1024 * 16 * 3 = 49152
		* arbitrary limit need for USB 3.1 Gen2
		* sizemax: 96 DPs at SSP, 96 * 1024 = 98304
		*/
		if (isopkt[u].length > 49152) {
		if (isopkt[u].length > 98304) {
		ret = -EINVAL;
		goto error;
		}

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