On Mon, Jul 6, 2020 at 5:18 PM Dave Jiang <dave.jiang@xxxxxxxxx> wrote:
>
> dma_request_chan() is expected to return ERR_PTR rather than NULL. This
> triggered a crash in pl011_dma_probe() when dma_device_list is empty
> and returning NULL. Fix return of NULL ptr to ERR_PTR(-ENODEV).
>
> Fixes: deb9541f5052 ("dmaengine: check device and channel list for empty")
> Reported-by: Arnd Bergmann <arnd@xxxxxxxx>
It was really
Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>
Though I did the analysis and found what caused the problem.
The fix looks good,
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
