]> git.kernelconcepts.de Git - karo-tx-linux.git/commit
USB: UHCI: fix IRQ race during initialization
authorAlan Stern <stern@rowland.harvard.edu>
Tue, 22 Jan 2013 16:37:35 +0000 (11:37 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 28 Jan 2013 04:46:28 +0000 (20:46 -0800)
commit27b2a263fa42cbad0fb33da2de30e4bbc380c43f
tree64d0d743f359aee479fa187b220e8aed4597979b
parentef3319d2624e24085982336facc71b414c134f4a
USB: UHCI: fix IRQ race during initialization

commit 0f815a0a700bc10547449bde6c106051a035a1b9 upstream.

This patch (as1644) fixes a race that occurs during startup in
uhci-hcd.  If the IRQ line is shared with other devices, it's possible
for the handler routine to be called before the data structures are
fully initialized.

The problem is fixed by adding a check to the IRQ handler routine.  If
the initialization hasn't finished yet, the routine will return
immediately.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Don Zickus <dzickus@redhat.com>
Tested-by: "Huang, Adrian (ISS Linux TW)" <adrian.huang@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/uhci-hcd.c