From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Oliver Neukum <oliver@neukum.org>,
Henrik Rydberg <rydberg@euromail.se>,
linux-input@vger.kernel.org, dtor@mail.ru
Subject: Re: [PATCH V3] input: Fix USB autosuspend on bcm5974
Date: Wed, 12 Oct 2011 17:16:51 +0100 [thread overview]
Message-ID: <20111012161651.GA28601@srcf.ucam.org> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1110121101420.2093-100000@iolanthe.rowland.org>
On Wed, Oct 12, 2011 at 11:28:06AM -0400, Alan Stern wrote:
> Well, if the usage counter is 0 then you wouldn't want to call
> usb_put_interface_async(). On the other hand, if the usage counter is
> 0 then by definition the device isn't in use, so you shouldn't need to
> fail an autosuspend request -- not unless it races with an I/O event.
Yeah. Plausibly the model we have in hid is wrong at the moment - rather
than set flags that block suspend, it might make more sense to take
references. It'd complicate things a little, in that we'd have to take
more care in terms of keeping track of the state.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2011-10-12 16:16 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-10 15:47 [PATCH V3] input: Fix USB autosuspend on bcm5974 Matthew Garrett
2011-10-10 21:05 ` Henrik Rydberg
2011-10-10 21:12 ` Matthew Garrett
2011-10-10 22:44 ` Henrik Rydberg
2011-10-11 0:11 ` Matthew Garrett
2011-10-11 4:10 ` Oliver Neukum
2011-10-11 11:04 ` Henrik Rydberg
2011-10-11 11:09 ` Oliver Neukum
2011-10-11 20:42 ` Matthew Garrett
2011-10-12 6:32 ` Oliver Neukum
2011-10-12 14:33 ` Alan Stern
2011-10-12 14:37 ` Oliver Neukum
2011-10-12 15:28 ` Alan Stern
2011-10-12 16:16 ` Matthew Garrett [this message]
2011-10-12 16:56 ` Oliver Neukum
2011-10-12 16:59 ` Matthew Garrett
2011-10-12 17:24 ` Alan Stern
2011-10-12 17:26 ` Matthew Garrett
2011-10-12 17:41 ` Alan Stern
2011-10-12 18:33 ` Henrik Rydberg
2011-10-12 19:21 ` Alan Stern
2011-10-13 8:20 ` Henrik Rydberg
2011-10-13 15:49 ` Alan Stern
2011-10-13 17:21 ` Henrik Rydberg
2011-10-12 17:11 ` Oliver Neukum
2011-10-12 19:18 ` Alan Stern
2011-10-11 16:05 ` Dmitry Torokhov
2011-10-11 16:43 ` Alan Stern
2011-10-12 7:03 ` Oliver Neukum
2011-10-12 13:54 ` Matthew Garrett
2011-10-12 14:18 ` Alan Stern
2011-10-12 14:26 ` Matthew Garrett
2011-10-12 14:38 ` Oliver Neukum
2011-10-12 18:50 ` Henrik Rydberg
2011-10-13 6:47 ` Oliver Neukum
2011-10-10 21:16 ` Matthew Garrett
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