linux-kernel - [PATCH] Revert "V4L/DVB: uvc: Enable USB autosuspend by default on uvcvideo"

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Message-Id: <1366790239-838-1-git-send-email-adam.lee@canonical.com>
Date:	Wed, 24 Apr 2013 15:57:19 +0800
From:	adam.lee@...onical.com
To:	linux-kernel@...r.kernel.org
Cc:	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Matthew Garrett <mjg@...hat.com>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Adam Lee <adam.lee@...onical.com>,
	linux-media@...r.kernel.org (open list:USB VIDEO CLASS)
Subject: [PATCH] Revert "V4L/DVB: uvc: Enable USB autosuspend by default on uvcvideo"

From: Adam Lee <adam.lee@...onical.com>

This reverts commit 3dae8b41dc5651f8eb22cf310e8b116480ba25b7.

1, I do have a Chicony webcam, implements autosuspend in a broken way,
make `poweroff` performs rebooting when its autosuspend enabled.

2, There are other webcams which don't support autosuspend too, like
https://patchwork.kernel.org/patch/2356141/

3, kernel removed USB_QUIRK_NO_AUTOSUSPEND in
a691efa9888e71232dfb4088fb8a8304ffc7b0f9, because autosuspend is
disabled by default.

So, we need to disable autosuspend in uvcvideo, maintaining a quirk list
only for uvcvideo is not a good idea.

Signed-off-by: Adam Lee <adam.lee@...onical.com>
---
 drivers/media/usb/uvc/uvc_driver.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 5dbefa6..8556f7c 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1914,7 +1914,6 @@ static int uvc_probe(struct usb_interface *intf,
 	}
 
 	uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
-	usb_enable_autosuspend(udev);
 	return 0;
 
 error:
-- 
1.7.10.4

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