* Krzysztof Opasiak <k.opasiak@xxxxxxxxxxx> [140922 01:07]: > Dear Tony, > > > -----Original Message----- > > From: linux-usb-owner@xxxxxxxxxxxxxxx [mailto:linux-usb- > > owner@xxxxxxxxxxxxxxx] On Behalf Of Tony Lindgren > > Sent: Saturday, September 20, 2014 5:51 PM > > To: Matt Porter > > Cc: linux-usb@xxxxxxxxxxxxxxx > > Subject: [PATCH] libusbg: Fix usbg_disable_gadget to actually clear > > the UDC > > > > Currently usbg_disable_gadget() does not actually write anything > > to UDC to clear it and the configured UDC name stays there. > > > > No, udc name doesn't stay there due to O_TRUNC flag which is always used > for writing in usbg_write_string(). With this flag we don't need to > write new line to file because size of file is set to 0 while opening. > > Summing up: > > open("/sys/kernel/config/usb_gadget/g1/UDC", O_WRONLY|O_CREAT|O_TRUNC, > 0666) = 3 > close(3) = 0 > > causes unbind, so everything works fine. Hmm not clearing for me doing this afterwards: # cat /sys/kernel/config/usb_gadget/g1/UDC musb-hdrc.0.auto The UDC name stays there and won't get cleared. Am I missing something? Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
