From: Eric Lescouet <lescouet@virtuallogix.com>
Date: Sat, 24 Apr 2010 00:55:24 +0000 (+0200)
Subject: staging: usbip: Fix deadlock
X-Git-Tag: v2.6.34-rc7~36^2~6
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d01f42a22ef381ba973958e977209ac9a8667d57;p=pandora-kernel.git

staging: usbip: Fix deadlock

When detaching a port from the client side (usbip --detach 0),
the event thread, on the server side, is going to deadlock.
The "eh" server thread is getting USBIP_EH_RESET event and calls:
  -> stub_device_reset() -> usb_reset_device()
the USB framework is then calling back _in the same "eh" thread_ :
  -> stub_disconnect() -> usbip_stop_eh() -> wait_for_completion()
the "eh" thread is being asleep forever, waiting for its own completion.
This patch checks if "eh" is the current thread, in usbip_stop_eh().

Signed-off-by: Eric Lescouet <eric@lescouet.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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