Re: [PATCH] spi: bitbang: Fix NULL pointer dereference in spi_unregister_master

[Axel Lin <axel.lin@xxxxxxxxxx>]

YueHaibing <yuehaibing@xxxxxxxxxx> 於 2019年5月16日 週四 下午3:57寫道：
>
> If spi_register_master fails in spi_bitbang_start
> because device_add failure, We should return the
> error code other than 0, otherwise calling
> spi_bitbang_stop may trigger NULL pointer dereference
> like this:

Reviewed-by: Axel Lin <axel.lin@xxxxxxxxxx>