Messages in this thread Patch in this message | | | Subject | [PATCH] proper bios handoff in ehci-hcd | Date | Mon, 14 Jun 2004 15:30:44 -0500 | From | <> |
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Stuart Hayes here at Dell has identified this or/and mix-up in the ehci-hcd driver. Because of this, ehci-hcd is not properly released by BIOSes supporting full 2.0 and port behavior can then become erratic.
This is broken in latest 2.4 and 2.6.
Gary Lerhaupt Dell Linux Development http://linux.dell.com
--- linux/drivers/usb/host/ehci-hcd.c.orig 2004-06-05 03:12:18.000000000 -0500 +++ linux/drivers/usb/host/ehci-hcd.c 2004-06-05 01:18:51.000000000 -0500 @@ -290,7 +290,7 @@ static int bios_handoff (struct ehci_hcd int msec = 500; /* request handoff to OS */ - cap &= 1 << 24; + cap |= 1 << 24; pci_write_config_dword (ehci->hcd.pdev, where, cap); /* and wait a while for it to happen */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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