linux-kernel - Re: [Patch] Increase USBFS Bulk Transfer size

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Date:	Mon, 17 Oct 2011 14:38:52 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Markus Rechberger <mrechberger@...il.com>
cc:	USB list <linux-usb@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [Patch] Increase USBFS Bulk Transfer size

Markus:

Attached is a sequence of two patches for you to try out.  The second
is meant to be applied on top of the first.  I based them on 3.1-rc4
(more or less) so they may need a little tweaking for your kernel, but
hopefully not very much.

The first patch simplifies the error pathways for the USB submission
routines in usbfs.  The second patch removes the limits on the sizes of
individual URBs and replaces them with a global limit on the total
amount of memory allocated by usbfs.

They work okay on my system but I don't have any good way to give them
a thorough test.  Please try them out and see if they allow your webcam
programs to work properly.

Alan Stern

View attachment "usbfs-errors.patch" of type "TEXT/PLAIN" (6852 bytes)

View attachment "usbfs-limits.patch" of type "TEXT/PLAIN" (5554 bytes)