Re: [PATCH v2] usb: gadget: function: printer: avoid wrong list handling in printer_write()

Hi Greg, Yoshihiro Shimoda writes: > When printer_write() calls usb_ep_queue(), a udc driver (e.g. > renesas_usbhs driver) may call usb_gadget_giveback_request() in > the udc .queue ops immediately. Then, printer_write() calls > list_add(>list, >tx_reqs_active)

[PATCH v2] usb: gadget: function: printer: avoid wrong list handling in printer_write()

When printer_write() calls usb_ep_queue(), a udc driver (e.g. renesas_usbhs driver) may call usb_gadget_giveback_request() in the udc .queue ops immediately. Then, printer_write() calls list_add(>list, >tx_reqs_active) wrongly. After that, if we do unbind the printer driver, WARN_ON() happens in