On Sat, Nov 06, 2021 at 07:54:39PM -0500, Drew Abbott wrote: > Hi all, > > I am working on a kernel module that should shut down the device when USB > is unplugged. I make a call to kernel_power_off(), but I see that it gets > stuck trying to call blocking_notifier_call_chain(&reboot_notifier_list, > (state == SYSTEM_HALT) ? SYS_HALT : SYS_POWER_OFF, NULL); in > kernel_shutdown_prepare(). Where are you calling it from? Don't call it from irq context, which is the context that USB urbs are called from. > There is currently another driver that has the same function, and shuts > down the device by calling kernel_power_off() successfully. I have tried > adding prints in blocking_notifier_call_chain, but then the kernel log is > flooded with calls and I can't really see what is happening. > Does anyone have any insight into why my call to kernel_power_off() is > hanging? Do you have a link to your driver code so it can be reviewed? thanks, greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
