Commit 04683909 authored by Peter Chen's avatar Peter Chen Committed by Felipe Balbi
Browse files

usb: gadget: f_sourcesink: format data pattern according to max packet size 



Since the host and gadget can't agree with transfer length before
each transfer, but they agree with max packet size for each
endpoint, we use max packet size to format data pattern.

Acked-by: default avatarMichal Nazarewicz <mina86@mina86.com>
Signed-off-by: default avatarPeter Chen <peter.chen@freescale.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent b9a6e8e1

drivers/usb/gadget/function/f_sourcesink.c

+4 −2
Original line number Diff line number Diff line
@@ -489,6 +489,7 @@ static int check_read_data(struct f_sourcesink *ss, struct usb_request *req) 
	unsigned		i;

	u8			*buf = req->buf;

	struct usb_composite_dev *cdev = ss->function.config->cdev;

	int max_packet_size = le16_to_cpu(ss->out_ep->desc->wMaxPacketSize);



	if (pattern == 2)

		return 0;
@@ -510,7 +511,7 @@ static int check_read_data(struct f_sourcesink *ss, struct usb_request *req) 
		 * stutter for any reason, including buffer duplication...)

		 */

		case 1:

			if (*buf == (u8)(i % 63))

			if (*buf == (u8)((i % max_packet_size) % 63))

				continue;

			break;

		}
@@ -525,6 +526,7 @@ static void reinit_write_data(struct usb_ep *ep, struct usb_request *req) 
{

	unsigned	i;

	u8		*buf = req->buf;

	int max_packet_size = le16_to_cpu(ep->desc->wMaxPacketSize);



	switch (pattern) {

	case 0:
@@ -532,7 +534,7 @@ static void reinit_write_data(struct usb_ep *ep, struct usb_request *req) 
		break;

	case 1:

		for  (i = 0; i < req->length; i++)

			*buf++ = (u8) (i % 63);

			*buf++ = (u8) ((i % max_packet_size) % 63);

		break;

	case 2:

		break;

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