+ Praneeth Bajjuri + Tom Rini + Rob Herring
On Tue, Feb 16, 2016 at 7:59 PM, Semen Protsenko semen.protsenko@linaro.org wrote:
From: Sam Protsenko semen.protsenko@linaro.org
In case when usb_composite_register() failed once (for whatever reason), it will fail further even if all conditions are correct. Example:
=> fastboot 2 Invalid Controller Index couldn't find an available UDC g_dnl_register: failed!, error: -19 exit not allowed from main input shell. => fastboot 0 g_dnl_register: failed!, error: -22 exit not allowed from main input shell.Despite that 0 is correct index for USB controller, "fastboot 0" command will fail, because "composite" structure wasn't cleared properly on previous fail (on "fastboot 2" command).
This patch fixes that erroneous behavior, allowing us to use composite even after previous failure.
Signed-off-by: Sam Protsenko semen.protsenko@linaro.org
drivers/usb/gadget/composite.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index 60f9272..d0ee784 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -1077,6 +1077,8 @@ static struct usb_gadget_driver composite_driver = { */ int usb_composite_register(struct usb_composite_driver *driver) {
int res;if (!driver || !driver->dev || !driver->bind || composite) return -EINVAL;@@ -1084,7 +1086,11 @@ int usb_composite_register(struct usb_composite_driver *driver) driver->name = "composite"; composite = driver;
return usb_gadget_register_driver(&composite_driver);
res = usb_gadget_register_driver(&composite_driver);if (res != 0)composite = NULL;return res;}
/**
2.7.0