uvcvideo: add quirk for dev parent with broken auto suspend

wuliangfeng · wuliangfeng · commit 801ff69e8bf6 · 2018-04-26T10:52:31.000+08:00
If the parent of uvc device has a quirk for broken
auto-suspend function (e.g. rk3328 usb 3.0 root hub),
we also need to disable auto-suspend for the uvc device.

Change-Id: Ida8d05a411f49f39e13cad3ec837a56598b4a630
Signed-off-by: William Wu &lt;william.wu@rock-chips.com&gt;
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
@@ -2074,7 +2074,8 @@ static int uvc_probe(struct usb_interface *intf,
 	}
 
 	uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
-	if (udev->quirks & USB_QUIRK_AUTO_SUSPEND)
+	if (udev->quirks & USB_QUIRK_AUTO_SUSPEND ||
+	    udev->parent->quirks & USB_QUIRK_AUTO_SUSPEND)
 		uvc_printk(KERN_INFO, "auto-suspend is blacklisted for this device\n");
 	else
 		usb_enable_autosuspend(udev);

Original file line number	Diff line number	Diff line change
`@@ -2074,7 +2074,8 @@ static int uvc_probe(struct usb_interface *intf,`
`2074`	`2074`	`}`
`2075`	`2075`
`2076`	`2076`	`uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");`
`2077`		`- if (udev->quirks & USB_QUIRK_AUTO_SUSPEND)`
	`2077`	`+ if (udev->quirks & USB_QUIRK_AUTO_SUSPEND \|\|`
	`2078`	`+ udev->parent->quirks & USB_QUIRK_AUTO_SUSPEND)`
`2078`	`2079`	`uvc_printk(KERN_INFO, "auto-suspend is blacklisted for this device\n");`
`2079`	`2080`	`else`
`2080`	`2081`	`usb_enable_autosuspend(udev);`