Re: [PATCH 1/3] media: ngene: Replace semaphore cmd_mutex with mutex

[Binoy Jayan]

Hi Arnd,

On 9 June 2017 at 16:06, Arnd Bergmann <arnd@xxxxxxxx> wrote:

>> Thank you for pointing out that. I'll check the
>> concurrency part. By the way why do we need mutex_destoy?
>> To debug an aberrate condition?
>
> At first I suspected the down() here was added for the same
> purpose as a mutex_destroy: to ensure that we are in a sane
> state before we free the device structure, but the way they
> achieve that is completely different.
>
> However, if there is any way that a command may still be in
> progress by the time we get to ngene_stop(), we may also
> be lacking reference counting on the ngene structure here.
> So far I haven't found any of those, and think the mutex_destroy()
> is sufficient here as a debugging help.

I've made the necessary changes. Thank you for reviewing all the patches.

Regards,
Binoy