38 lines
1.1 KiB
Diff
38 lines
1.1 KiB
Diff
From: Wu Zhangjin <wuzj@lemote.com>
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Date: Mon, 4 Jan 2010 11:33:02 +0800
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Subject: USB: Fix the mouse problem when copying large amounts of data
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/3.14/patches-3.14.0-rt1.tar.xz
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When copying large amounts of data between the USB storage devices and
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the hard disk, the USB mouse will not work, this patch fixes it.
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[NOTE: This problem have been found in the Loongson family machines, not
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sure whether it is producible on other platforms]
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Signed-off-by: Hu Hongbing <huhb@lemote.com>
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Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
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---
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drivers/usb/host/ohci-hcd.c | 10 +++++++---
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1 file changed, 7 insertions(+), 3 deletions(-)
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--- a/drivers/usb/host/ohci-hcd.c
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+++ b/drivers/usb/host/ohci-hcd.c
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@@ -864,9 +864,13 @@ static irqreturn_t ohci_irq (struct usb_
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}
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if (ints & OHCI_INTR_WDH) {
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- spin_lock (&ohci->lock);
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- dl_done_list (ohci);
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- spin_unlock (&ohci->lock);
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+ if (ohci->hcca->done_head == 0) {
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+ ints &= ~OHCI_INTR_WDH;
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+ } else {
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+ spin_lock (&ohci->lock);
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+ dl_done_list (ohci);
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+ spin_unlock (&ohci->lock);
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+ }
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}
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if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {
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