Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6fd75b19483b2f6e6619602a535b4939e46921c1
Commit: 6fd75b19483b2f6e6619602a535b4939e46921c1
Parent: 615ae11b3b4af7a5adb0819ff11b3b764eb92268
Author: Alan Stern <[EMAIL PROTECTED]>
AuthorDate: Fri May 4 11:57:00 2007 -0400
Committer: Greg Kroah-Hartman <[EMAIL PROTECTED]>
CommitDate: Fri Jun 8 16:24:31 2007 -0700
OHCI: Fix machine check in ohci_hub_status_data
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 <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
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)
-
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