Re: [PATCH V3] coresight: trbe: Fix TRBE potential sleep in atomic context

On Fri, 18 Aug 2023 16:40:52 +0800, Junhao He wrote:

smp_call_function_single() will allocate an IPI interrupt vector to the target processor and send a function call request to the interrupt vector. After the target processor receives the IPI interrupt, it will execute arm_trbe_remove_coresight_cpu() call request in the interrupt handler.

According to the device_unregister() stack information, if other process is useing the device, the down_write() may sleep, and trigger deadlocks or unexpected errors.

[...]

Applied, thanks!

[1/1] coresight: trbe: Fix TRBE potential sleep in atomic context https://git.kernel.org/coresight/c/c0a232f1e19e3

Best regards,