Re: [PATCH v2] usb: cdc-wdm: Fix a sleep-in-atomic-context bug in service_outstanding_interrupt()

On 2018/9/11 15:49, Sebastian Andrzej Siewior wrote: On 2018-09-01 16:12:10 [+0800], Jia-Ju Bai wrote: wdm_in_callback() is a completion handler function for the USB driver. So it should not sleep. But it calls service_outstanding_interrupt(), which calls usb_submit_urb() with GFP_KERNEL. At

Re: [PATCH v2] usb: cdc-wdm: Fix a sleep-in-atomic-context bug in service_outstanding_interrupt()

On 2018-09-01 16:12:10 [+0800], Jia-Ju Bai wrote: > wdm_in_callback() is a completion handler function for the USB driver. > So it should not sleep. But it calls service_outstanding_interrupt(), > which calls usb_submit_urb() with GFP_KERNEL. At which point does wdm_in_callback() invoke service_