Hi:
Here's a small patch that fixes the ohci shutdown.
The patch is against v3.4.54.
>From cc16ef2f15300201cc3f680b7df20ecded28daa4 Mon Sep 17 00:00:00 2001
From: Cai Zhiyong <caizhiyong@xxxxxxxxxx>
Date: Tue, 23 Jul 2013 12:17:01 +0800
Subject: [PATCH] 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".
This patch disable ohci interrupt before reset ohci.
The patch is tested at the arm cortex-a9 demo board.
Signed-off-by: Cai Zhiyong <caizhiyong@xxxxxxxxxx>
---
drivers/usb/host/ohci-hcd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 235171f..3dfeed1 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -895,8 +895,8 @@ static void ohci_stop (struct usb_hcd *hcd)
if (quirk_nec(ohci))
flush_work_sync(&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;
--
1.8.1.5
Looking forward to your feedback.
Best regards,
Cai Zhiyong.
http://www.huawei.com
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