From: caizhiyong <caizhiyong@huawei.com>
Date: Fri, 26 Jul 2013 07:12:14 +0000 (+0000)
Subject: USB: ohci_usb warn "irq nobody cared" on shutdown
X-Git-Tag: v3.12-rc1~186^2~136
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=435932f2c75efcdd07273a437b9be32647d56d73;p=profile%2Fivi%2Fkernel-x86-ivi.git

USB: ohci_usb warn "irq nobody cared" on shutdown

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>
---

diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index a9d3437..8f6b695 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -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;