]> err.no Git - linux-2.6/commit
Revert "USB: don't explicitly reenable root-hub status interrupts"
authorLinus Torvalds <torvalds@linux-foundation.org>
Sun, 6 Jul 2008 17:27:25 +0000 (10:27 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sun, 6 Jul 2008 17:27:25 +0000 (10:27 -0700)
commit09ca8adbe9f724a7e96f512c0039c4c4a1c5dcc0
treed9eccc5f23b8565fc93ddcecd6a480d21bbbcebb
parentb7279469d66b55119784b8b9529c99c1955fe747
Revert "USB: don't explicitly reenable root-hub status interrupts"

This reverts commit e872154921a6b5256a3c412dd69158ac0b135176.

Andrey Borzenkov reports that it resulted in a totally hung machine for
him when loading the OHCI driver.  Extensive netconsole capture with
SysRq output shows that modprobe gets stuck in ohci_hub_status_data()
when probing and enabling the OHCI controller, see for example

http://lkml.org/lkml/2008/7/5/236

for an analysis.

The problem appears to be an interrupt flood triggered by the commit
that gets reverted, and Andrey confirmed that the revert makes things
work for him again.

Reported-and-tested-by: Andrey Borzenkov <arvidjaar@mail.ru>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: David Brownell <david-b@pacbell.net>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
22 files changed:
drivers/usb/core/hcd.c
drivers/usb/core/hcd.h
drivers/usb/core/hub.c
drivers/usb/host/ohci-at91.c
drivers/usb/host/ohci-au1xxx.c
drivers/usb/host/ohci-ep93xx.c
drivers/usb/host/ohci-hub.c
drivers/usb/host/ohci-lh7a404.c
drivers/usb/host/ohci-omap.c
drivers/usb/host/ohci-pci.c
drivers/usb/host/ohci-pnx4008.c
drivers/usb/host/ohci-pnx8550.c
drivers/usb/host/ohci-ppc-of.c
drivers/usb/host/ohci-ppc-soc.c
drivers/usb/host/ohci-ps3.c
drivers/usb/host/ohci-pxa27x.c
drivers/usb/host/ohci-s3c2410.c
drivers/usb/host/ohci-sa1111.c
drivers/usb/host/ohci-sh.c
drivers/usb/host/ohci-sm501.c
drivers/usb/host/ohci-ssb.c
drivers/usb/host/u132-hcd.c