| From: Wu Zhangjin <wuzj@lemote.com> |
| Date: Mon, 4 Jan 2010 11:33:02 +0800 |
| Subject: 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(-) |
| |
| Index: linux-stable/drivers/usb/host/ohci-hcd.c |
| =================================================================== |
| --- linux-stable.orig/drivers/usb/host/ohci-hcd.c |
| +++ linux-stable/drivers/usb/host/ohci-hcd.c |
| @@ -829,9 +829,13 @@ static irqreturn_t ohci_irq (struct usb_ |
| } |
| |
| 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)) { |
