This is a note to let you know that I've just added the patch titled USB: class: CDC-ACM: fix race between get_serial and set_serial to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-class-cdc-acm-fix-race-between-get_serial-and-set_serial.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it.