From: Vojtech Pavlik <vojtech@suse.cz>
Here is a patch from the SuSE kernel CVS. It's been in SuSE's kernels
since 9.1 I believe, and that's a long time.
Cc: <linux-usb-devel@lists.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
Documentation/kernel-parameters.txt | 1 +
drivers/pci/quirks.c | 11 +++++++++++
2 files changed, 12 insertions(+)
diff -puN Documentation/kernel-parameters.txt~make-usb-handoff-the-default-usb-no-handoff-turns-it-off Documentation/kernel-parameters.txt
--- devel/Documentation/kernel-parameters.txt~make-usb-handoff-the-default-usb-no-handoff-turns-it-off 2005-08-05 01:04:41.000000000 -0700
+++ devel-akpm/Documentation/kernel-parameters.txt 2005-08-05 01:04:41.000000000 -0700
@@ -1479,6 +1479,7 @@ running once the system is up.
Format: <io>,<irq>
usb-handoff [HW] Enable early USB BIOS -> OS handoff
+ usb-no-handoff [HW] Disable early USB BIOS -> OS handoff
usbhid.mousepoll=
[USBHID] The interval which mice are to be polled at.
diff -puN drivers/pci/quirks.c~make-usb-handoff-the-default-usb-no-handoff-turns-it-off drivers/pci/quirks.c
--- devel/drivers/pci/quirks.c~make-usb-handoff-the-default-usb-no-handoff-turns-it-off 2005-08-05 01:04:41.000000000 -0700
+++ devel-akpm/drivers/pci/quirks.c 2005-08-05 01:05:19.000000000 -0700
@@ -908,7 +908,11 @@ static void __init quirk_sis_96x_smbus(s
#define EHCI_USBLEGCTLSTS 4 /* legacy control/status */
#define EHCI_USBLEGCTLSTS_SOOE (1 << 13) /* SMI on ownership change */
+#ifdef CONFIG_X86 /* x86 && x86_64 */
+int usb_early_handoff __devinitdata = 1; /* Do handoff by default */
+#else
int usb_early_handoff __devinitdata = 0;
+#endif
static int __init usb_handoff_early(char *str)
{
usb_early_handoff = 1;
@@ -916,6 +920,13 @@ static int __init usb_handoff_early(char
}
__setup("usb-handoff", usb_handoff_early);
+static int __init usb_no_handoff_early(char *str)
+{
+ usb_early_handoff = 0;
+ return 0;
+}
+__setup("usb-no-handoff", usb_no_handoff_early);
+
static void __devinit quirk_usb_handoff_uhci(struct pci_dev *pdev)
{
unsigned long base = 0;
_