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Message-Id: <1181347501667-git-send-email-gregkh@suse.de> Date: Fri, 8 Jun 2007 17:03:54 -0700 From: Greg Kroah-Hartman <gregkh@...e.de> To: linux-usb-devel@...ts.sourceforge.net Cc: linux-kernel@...r.kernel.org, Alan Stern <stern@...land.harvard.edu>, Greg Kroah-Hartman <gregkh@...e.de> Subject: [PATCH 9/9] OHCI: Fix machine check in ohci_hub_status_data From: Alan Stern <stern@...land.harvard.edu> This patch (as901) fixes an oversight in ohci-hcd. The hub_status_data routine must not try to access the controller's memory-mapped registers if the controller is in a low-power state; such attempts will cause a crash on some architectures (such as PPC). Signed-off-by: Alan Stern <stern@...land.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de> --- drivers/usb/host/ohci-hub.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c index 216c9c9..bb9cc59 100644 --- a/drivers/usb/host/ohci-hub.c +++ b/drivers/usb/host/ohci-hub.c @@ -417,6 +417,8 @@ ohci_hub_status_data (struct usb_hcd *hcd, char *buf) unsigned long flags; spin_lock_irqsave (&ohci->lock, flags); + if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) + goto done; /* undocumented erratum seen on at least rev D */ if ((ohci->flags & OHCI_QUIRK_AMD756) -- 1.5.2.1 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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