linux-kernel - Re: [PATCH 1/2] mailbox: mailbox-test: add support for fasync/poll

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Message-ID: <CABb+yY0G5ck-ZV5wriNMn8fyLRhA2mRcqE=_rmh5KrzVyL6inA@mail.gmail.com>
Date:   Sat, 10 Dec 2016 20:51:20 +0530
From:   Jassi Brar <jassisinghbrar@...il.com>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] mailbox: mailbox-test: add support for fasync/poll

On Fri, Dec 9, 2016 at 12:26 AM, Sudeep Holla <sudeep.holla@....com> wrote:
>
>
> On 29/11/16 14:37, Sudeep Holla wrote:
>> Currently the read operation on the message debug file returns error if
>> there's no data ready to be read. It expects the userspace to retry if
>> it fails. Since the mailbox response could be asynchronous, it would be
>> good to add support to block the read until the data is available.
>>
>> We can also implement poll file operations so that the userspace can
>> wait to become ready to perform any I/O.
>>
>> This patch implements the poll and fasync file operation callback for
>> the test mailbox device.
>>
>> Cc: Lee Jones <lee.jones@...aro.org>
>> Cc: Jassi Brar <jaswinder.singh@...aro.org>
>> Signed-off-by: Sudeep Holla <sudeep.holla@....com>
>
> Gentle Ping!
>
Would be good to have Lee's ack.