linux-kernel - Re: [linux-usb-devel] spontaneous disconnect with "usb-storage: implement autosuspend"

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Message-Id: <200708142033.23158.oliver@neukum.org>
Date:	Tue, 14 Aug 2007 20:33:22 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	Paolo Ornati <ornati@...twebnet.it>
Cc:	linux-usb-devel@...ts.sourceforge.net,
	Alan Stern <stern@...land.harvard.edu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [linux-usb-devel] spontaneous disconnect with "usb-storage: implement autosuspend"

Am Dienstag 14 August 2007 schrieb Paolo Ornati:
> On Tue, 14 Aug 2007 17:46:16 +0200
> Oliver Neukum <oliver@...kum.org> wrote:
> 
> > Am Dienstag 14 August 2007 schrieb Paolo Ornati:
> > > Hewlett-Packard PhotoSmart 720 / PhotoSmart 935 (storage)  
> > 
> > Please try this patch.
> 
> Tried on -rc3 but it doesn't work, dmesg attached.
> 
> However I've found that if "hald" is running the problems doesn't
> happen (I think it's just hidden by the fact that hald do some polling
> on it preventing autosuspend to trigger).

Exactly. This is not reliable. It needs to be done in kernel. This patch
should do it.

	Regards
		Oliver

---

--- a/drivers/usb/core/quirks.c	2007-08-14 17:42:22.000000000 +0200
+++ b/drivers/usb/core/quirks.c	2007-08-14 20:30:28.000000000 +0200
@@ -30,6 +30,8 @@
 static const struct usb_device_id usb_quirk_list[] = {
 	/* HP 5300/5370C scanner */
 	{ USB_DEVICE(0x03f0, 0x0701), .driver_info = USB_QUIRK_STRING_FETCH_255 },
+	/* Hewlett-Packard PhotoSmart 720 / PhotoSmart 935 (storage) */
+	{ USB_DEVICE(0x03f0, 0x4002), .driver_info = USB_QUIRK_NO_AUTOSUSPEND },
 	/* Acer Peripherals Inc. (now BenQ Corp.) Prisa 640BU */
 	{ USB_DEVICE(0x04a5, 0x207e), .driver_info = USB_QUIRK_NO_AUTOSUSPEND },
 	/* Benq S2W 3300U */
-
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