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From 34db0fdabaafd5dd83086f4019e05daf2d1afcd3 Mon Sep 17 00:00:00 2001
From: Wu Zhangjin <wuzj@lemote.com>
Date: Mon, 4 Jan 2010 11:33:02 +0800
Subject: [PATCH 086/271] USB: Fix the mouse problem when copying large
amounts of data
When copying large amounts of data between the USB storage devices and
the hard disk, the USB mouse will not work, this patch fixes it.
[NOTE: This problem have been found in the Loongson family machines, not
sure whether it is producible on other platforms]
Signed-off-by: Hu Hongbing <huhb@lemote.com>
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
---
drivers/usb/host/ohci-hcd.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 235171f..0157357 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -829,9 +829,13 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
}
if (ints & OHCI_INTR_WDH) {
- spin_lock (&ohci->lock);
- dl_done_list (ohci);
- spin_unlock (&ohci->lock);
+ if (ohci->hcca->done_head == 0) {
+ ints &= ~OHCI_INTR_WDH;
+ } else {
+ spin_lock (&ohci->lock);
+ dl_done_list (ohci);
+ spin_unlock (&ohci->lock);
+ }
}
if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {
--
1.7.10.4
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