USB Gadget Filesystem HID stuck on write when using mass storage at the same time
From: Benjamin Marty <hidden>
Date: 2021-06-29 13:45:59
Hello In my application, I boot a Linux System through USB Gadget mass storage and at the same time pass in USB Touch commands via USB HID Device. Both over the same USB OTG Gadget Link. If I execute USB HID commands during high traffic over the USB Mass Storage, the HID device gets stuck. Writes to it are then blocking forever. I'm not sure if I use something wrong or if this is a Kernel issue. Do I maybe need to check something before I'm allowed to write to the HID device? Hardware issue are unlikely, I tried it on the Raspberry Pi Platform and also on the NXP iMX8MM platform. Both have this HID device stuck issue. I have also tried multiple Intel Computers as USB Host. I tried to document my issue here with test scripts to replicate what I do in my C Application with the same result: https://github.com/raspberrypi/linux/issues/4373 Thanks Benjamin