From 71795c1df30b034414c921b4930ed88de34ca348 Mon Sep 17 00:00:00 2001 From: Pete Zaitcev <zaitcev@redhat.com> Date: Mon, 18 Sep 2006 22:57:22 -0700 Subject: USB: ohci_usb can oops on shutdown When ohci-hcd is shutting down (for rmmod or PC-card removal), there is a window when the device is shut down, HC communication area (->hcca) is freed, but the core has not called "free_irq" yet. If another device triggers a shared interrupt in this window, we oops when trying to access the freed ->hcca. This patch removes the window by calling free_irq before ->hcca is freed. The patch is tested at the PC hotplug test rig at Stratus, and with rmmod by Rafael Wysocki. Signed-off-by: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- drivers/usb/host/ohci-hcd.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 2c614af8f733..1027aa04583d 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -795,7 +795,9 @@ static void ohci_stop (struct usb_hcd *hcd) ohci_usb_reset (ohci); ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable); - + free_irq(hcd->irq, hcd); + hcd->irq = -1; + remove_debug_files (ohci); ohci_mem_cleanup (ohci); if (ohci->hcca) { -- cgit v1.2.3