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authorDavid Brownell <david-b@pacbell.net>2006-02-24 16:55:52 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2006-02-28 12:42:06 -0800
commit8c450802a3abf0e8a45238fcb7d22ed9d6f191ce (patch)
tree7b950d665abb07ef3afd07c6135e685d5a70a817 /drivers/usb/host
parentb9756c047ce6b60e3b96aa3c5db958acbdacedde (diff)
[PATCH] USB: fix EHCI BIOS handshake
Fix http://bugzilla.kernel.org/show_bug.cgi?id=6128 Finish morphing the "early handoff" version of the EHCI BIOS handshake over to match the previous implementation inside the EHCI driver (except that now we forcibly disable the SMI). The version that had been with the PCI code was surprisingly full of bugs. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: <yazar256@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host')
-rw-r--r--drivers/usb/host/pci-quirks.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 118288d9442..9e81c26313f 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -260,12 +260,13 @@ static void __devinit quirk_usb_disable_ehci(struct pci_dev *pdev)
offset + EHCI_USBLEGCTLSTS,
val | EHCI_USBLEGCTLSTS_SOOE);
#endif
- }
- /* always say Linux will own the hardware
- * by setting EHCI_USBLEGSUP_OS.
- */
- pci_write_config_byte(pdev, offset + 3, 1);
+ /* some systems get upset if this semaphore is
+ * set for any other reason than forcing a BIOS
+ * handoff..
+ */
+ pci_write_config_byte(pdev, offset + 3, 1);
+ }
/* if boot firmware now owns EHCI, spin till
* it hands it over.