linux-kernel - usbip: somtimes stalls at kernel

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Date:	Mon, 13 Dec 2010 23:36:52 +0100
From:	Németh Márton <nm127@...email.hu>
To:	gregkh <gregkh@...e.de>, devel@...verdev.osuosl.org
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: usbip: somtimes stalls at kernel_recvmsg()

Hi,

I'm working with usbip and I sometimes see a stall when I run
the "lsusb" command from the userspace. I added some debug messages
and it seems that the kernel_recvmsg() in
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=drivers/staging/usbip/usbip_common.c;h=210ef16bab8d271a52e5d36cd1994aad57ad99e1;hb=HEAD

This is the only place I could find where the TCP messages are arriving in
the usbip code.

What happens if a message does not arrive? Does it stall forever? If
yes, how can the kernel_recvmsg() call changed to handle some timeout?

	Márton Németh
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