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| author | Wu Zhangjin <wuzj@lemote.com> | 2010-01-04 11:33:02 +0800 |
|---|---|---|
| committer | Wu Zhangjin <wuzhangjin@gmail.com> | 2010-03-11 19:54:40 +0800 |
| commit | a54476e9eae1335542ac01492934398025b3999c (patch) | |
| tree | af45d76bcdc9244aabb7d2e3c1a3d968d64d6f2c | |
| parent | 876c52cc046e00eaa2ffc5124dc187106ef57594 (diff) | |
| download | lwn-a54476e9eae1335542ac01492934398025b3999c.tar.gz lwn-a54476e9eae1335542ac01492934398025b3999c.zip | |
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>
| -rw-r--r-- | drivers/usb/host/ohci-hcd.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 24eb74781919..ddbc27218955 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -832,9 +832,13 @@ 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)) { |