Commit 6876d58f authored by Kyösti Mälkki's avatar Kyösti Mälkki Committed by Felipe Balbi
Browse files

usb: gadget: dbgp: Fix endpoint config after USB disconnect 



SET_FEATURE request with DEBUG_MODE only worked the first time after module
initialisation. Per the USB 2.0 debug device specification, said request
is to be treated as if it were a SET_CONFIGURATION request, i.e. endpoint
must be re-configured.

As configure_endpoints() may now get called multiple times, move it outside
__init and move serial_alloc_tty() call into __init.

Code has assumption that endpoint mapping remains unchanged with consecutive
calls of configure_endpoints().

Signed-off-by: default avatarKyösti Mälkki <kyosti.malkki@gmail.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 8b9ca276

drivers/usb/gadget/legacy/dbgp.c

+14 −12
Original line number Diff line number Diff line
@@ -237,7 +237,7 @@ static void dbgp_unbind(struct usb_gadget *gadget) 
static unsigned char tty_line;

#endif



static int __init dbgp_configure_endpoints(struct usb_gadget *gadget)

static int dbgp_configure_endpoints(struct usb_gadget *gadget)

{

	int stp;
@@ -273,19 +273,10 @@ static int __init dbgp_configure_endpoints(struct usb_gadget *gadget) 


	dbgp.serial->in->desc = &i_desc;

	dbgp.serial->out->desc = &o_desc;



	if (gserial_alloc_line(&tty_line)) {

		stp = 3;

		goto fail_3;

	}

#endif



	return 0;



fail_3:

	dbgp.o_ep->driver_data = NULL;

#else

	return 0;

#endif

fail_2:

	dbgp.i_ep->driver_data = NULL;

fail_1:
@@ -324,10 +315,17 @@ static int __init dbgp_bind(struct usb_gadget *gadget, 
		err = -ENOMEM;

		goto fail;

	}



	if (gserial_alloc_line(&tty_line)) {

		stp = 4;

		err = -ENODEV;

		goto fail;

	}

#endif



	err = dbgp_configure_endpoints(gadget);

	if (err < 0) {

		stp = 4;

		stp = 5;

		goto fail;

	}
@@ -383,6 +381,10 @@ static int dbgp_setup(struct usb_gadget *gadget, 
#ifdef CONFIG_USB_G_DBGP_PRINTK

		err = dbgp_enable_ep();

#else

		err = dbgp_configure_endpoints(gadget);

		if (err < 0) {

			goto fail;

		}

		err = gserial_connect(dbgp.serial, tty_line);

#endif

		if (err < 0)

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