Re: [PATCH] Support for ESI Miditerminal 4140

[Matthias Koenig <list@phasorlab.de>]

Takashi Iwai <tiwai@suse.de> writes:
> The mutex belongs to the rawmidi device, so open/close is mutual as
> long as the same rawmidi device is used no matter which substream is
> used.  It doesn't care open/close of another rawmidi device, though.

Ah, thanks! This is the informationen I needed.

>> Hmm, then why should I hold an additional mutex?
>
> Well, I just thought of something as a replacement of mts->lock, but
> regarding open/close, yes, you can get rid of an extra mutex.
>
> You might still need a spinlock somewhere, but definitely not together
> with mdelay().

Yes, I decoupled now delay stuff from the spinlock sections and placed
the spinlocks just near the HW access.

New patch for next turn will follow.

Matthias


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