From: Alan Stern <stern@rowland.harvard.edu>
To: Mayuresh Kulkarni <mkulkarni@opensource.cirrus.com>
Cc: Oliver Neukum <oneukum@suse.com>,
Greg KH <gregkh@linuxfoundation.org>,
<patches@opensource.cirrus.com>, <linux-usb@vger.kernel.org>
Subject: Re: [PATCH] usb: core: devio: add ioctls for suspend and resume
Date: Thu, 20 Jun 2019 10:43:20 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.44L0.1906201042190.1512-100000@iolanthe.rowland.org> (raw)
In-Reply-To: <1561041295.20348.4.camel@opensource.cirrus.com>
On Thu, 20 Jun 2019, Mayuresh Kulkarni wrote:
> > It would be easiest to export the usb_autopm_* API to user space.
>
> AFAIU, usb_autopm_* API operate on interface rather than on device.
> Due to this, they are *indirectly* exposed by appropriate class drivers
> to the user-space class drivers cater to. E.g.: USB audio class driver
> calls usb_autopm_* APIs when user space calls pcm_open(playback_stream).
In fact, the usb_autopm_* API can operate both on interfaces and on
devices. It is used both ways in the kernel.
Alan Stern
next prev parent reply other threads:[~2019-06-20 14:43 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-10 10:01 [PATCH] usb: core: devio: add ioctls for suspend and resume Mayuresh Kulkarni
2019-06-05 9:41 ` Greg KH
2019-06-05 21:02 ` Alan Stern
2019-06-13 14:00 ` Mayuresh Kulkarni
2019-06-13 20:54 ` Alan Stern
2019-06-17 11:38 ` Mayuresh Kulkarni
2019-06-17 15:55 ` Alan Stern
2019-06-18 14:00 ` Mayuresh Kulkarni
2019-06-18 15:50 ` Alan Stern
2019-06-19 9:19 ` Oliver Neukum
2019-06-19 14:40 ` Alan Stern
2019-06-19 15:12 ` Oliver Neukum
2019-06-19 16:07 ` Alan Stern
2019-06-20 15:11 ` Mayuresh Kulkarni
2019-06-20 15:49 ` Alan Stern
2019-06-21 16:16 ` Mayuresh Kulkarni
2019-06-21 19:28 ` Alan Stern
2019-06-24 16:02 ` Mayuresh Kulkarni
2019-06-24 17:48 ` Alan Stern
2019-06-25 10:41 ` Mayuresh Kulkarni
2019-06-25 14:08 ` Alan Stern
2019-06-26 7:42 ` Oliver Neukum
2019-06-26 14:35 ` Alan Stern
2019-06-26 14:15 ` Mayuresh Kulkarni
2019-06-26 15:07 ` Alan Stern
2019-06-27 13:20 ` Mayuresh Kulkarni
2019-06-27 13:52 ` Alan Stern
2019-07-01 9:18 ` Oliver Neukum
2019-07-01 14:17 ` Alan Stern
2019-07-02 9:21 ` Oliver Neukum
2019-07-02 14:29 ` Alan Stern
2019-07-03 14:44 ` Mayuresh Kulkarni
2019-07-05 18:51 ` [RFC] usbfs: Add ioctls for runtime " Alan Stern
2019-07-11 9:16 ` Mayuresh Kulkarni
2019-07-11 14:20 ` Alan Stern
2019-07-11 14:36 ` Greg KH
2019-07-25 9:10 ` Mayuresh Kulkarni
2019-07-25 9:18 ` Greg KH
2019-07-25 15:18 ` Alan Stern
2019-07-25 16:05 ` Greg KH
2019-06-20 14:34 ` [PATCH] usb: core: devio: add ioctls for " Mayuresh Kulkarni
2019-06-20 14:43 ` Alan Stern [this message]
2019-06-13 13:32 ` Mayuresh Kulkarni
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