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| author |   Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-11-03 17:18:04 +0200 |
|---|---|---|
| committer |   Felipe Balbi <balbi@ti.com> | 2014-11-10 17:19:34 -0600 |
| commit | 6876d58f2f0548ce130b388c323eed17dc5d8689 (patch) | |
| tree | 6b2a670addb8cae0d1f31318db3e9fbd432ef630 | |
| parent | phy: twl4030: Fix build breakage (diff) | |
| download | linux-dev-6876d58f2f0548ce130b388c323eed17dc5d8689.tar.xz linux-dev-6876d58f2f0548ce130b388c323eed17dc5d8689.zip | |
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: Kyösti Mälkki <kyosti.malkki@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
| -rw-r--r-- | drivers/usb/gadget/legacy/dbgp.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/drivers/usb/gadget/legacy/dbgp.c b/drivers/usb/gadget/legacy/dbgp.c index 1b075132f8f1..633683a72a11 100644 --- a/drivers/usb/gadget/legacy/dbgp.c +++ b/drivers/usb/gadget/legacy/dbgp.c @@ -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) |