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linux-sg2042
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USB: OHCI: turn off RD when remote wakeup is disabled 

This patch (as1068b) disables the RD interrupt flag when an OHCI root
hub is suspended with remote wakeup disabled.  Although the spec
clearly states that this flag permits the controller to issue an
interrupt when a resume request from downstream is detected and not
when a local status change occurs, some controllers mistakenly use it
for both types of event.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2008-04-14 12:17:49 -04:00 committed by Greg Kroah-Hartman
parent 58a97ffeb2
commit 5f47493cdf
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/host/ohci-hub.c
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@ -106,7 +106,8 @@ __acquires(ohci->lock)
if (ohci_to_hcd(ohci)->self.root_hub->do_remote_wakeup || autostop) {
ohci->hc_control |= OHCI_CTRL_RWE;
} else {
ohci_writel (ohci, OHCI_INTR_RHSC, &ohci->regs->intrdisable);
ohci_writel(ohci, OHCI_INTR_RHSC | OHCI_INTR_RD,
&ohci->regs->intrdisable);
ohci->hc_control &= ~OHCI_CTRL_RWE;
}