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USB: ohci_usb warn "irq nobody cared" on shutdown

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When ohci-hcd is shutting down, call ohci_usb_reset reset ohci-hcd, the
root hub generate an interrupt, but ohci->rh_state is OHCI_RH_HALTED,
and ohci_irq ignore the interrupt, the kernel trigger warning "irq
nobody cared". ehci-hcd is first disable interrupts, then reset ehci.

This patch disable ohci interrupt before reset ohci.

The patch is tested at the arm cortex-a9 demo board.

Signed-off-by: caizhiyong <caizhiyong@huawei.com>
Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
caizhiyong 2013-07-26 07:12:14 +00:00 committed by Greg Kroah-Hartman
parent 4e682bbd32
commit 435932f2c7
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/host/ohci-hcd.c
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@ -938,8 +938,8 @@ static void ohci_stop (struct usb_hcd *hcd)
if (quirk_nec(ohci))
flush_work(&ohci->nec_work);
ohci_usb_reset (ohci);
ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
ohci_usb_reset(ohci);
free_irq(hcd->irq, hcd);
hcd->irq = 0;