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>master
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