From: Johannes Hirte <johannes.hirte@datenkhaos.de>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Jiri Kosina <jikos@kernel.org>,
Benjamin Tissoires <benjamin.tissoires@redhat.com>,
groeck@chromium.org, Nicolas Boichat <drinkcat@chromium.org>,
linux-usb@vger.kernel.org, linux-input@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] HID: usbhid: do not sleep when opening device
Date: Tue, 18 Aug 2020 13:59:06 +0200 [thread overview]
Message-ID: <20200818115906.GA26874@latitude> (raw)
In-Reply-To: <20200610043824.GA171503@dtor-ws>
On 2020 Jun 09, Dmitry Torokhov wrote:
> usbhid tries to give the device 50 milliseconds to drain its queues when
> opening the device, but dies it naively by simply sleeping in open handler,
> which slows down device probing (and thus may affect overall boot time).
>
> However we do not need to sleep as we can instead mark a point of time in
> the future when we should start processing the events.
>
> Reported-by: Nicolas Boichat <drinkcat@chromium.org>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> ---
>
This change breaks various Logitech devices:
https://bugzilla.kernel.org/show_bug.cgi?id=208935
--
Regards,
Johannes Hirte
next prev parent reply other threads:[~2020-08-18 12:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-10 4:38 [PATCH v2] HID: usbhid: do not sleep when opening device Dmitry Torokhov
2020-06-10 5:28 ` Guenter Roeck
2020-06-16 15:14 ` Jiri Kosina
2020-08-18 11:59 ` Johannes Hirte [this message]
2020-08-18 17:52 ` Jiri Kosina
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