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Upgrade to 4.4.50-rt62
[kvmfornfv.git]
/
kernel
/
drivers
/
dma
/
sh
/
usb-dmac.c
diff --git
a/kernel/drivers/dma/sh/usb-dmac.c
b/kernel/drivers/dma/sh/usb-dmac.c
index
f1bcc2a
..
b1bc945
100644
(file)
--- a/
kernel/drivers/dma/sh/usb-dmac.c
+++ b/
kernel/drivers/dma/sh/usb-dmac.c
@@
-600,27
+600,30
@@
static irqreturn_t usb_dmac_isr_channel(int irq, void *dev)
{
struct usb_dmac_chan *chan = dev;
irqreturn_t ret = IRQ_NONE;
{
struct usb_dmac_chan *chan = dev;
irqreturn_t ret = IRQ_NONE;
- u32 mask = USB_DMACHCR_TE;
- u32 check_bits = USB_DMACHCR_TE | USB_DMACHCR_SP;
+ u32 mask = 0;
u32 chcr;
u32 chcr;
+ bool xfer_end = false;
spin_lock(&chan->vc.lock);
chcr = usb_dmac_chan_read(chan, USB_DMACHCR);
spin_lock(&chan->vc.lock);
chcr = usb_dmac_chan_read(chan, USB_DMACHCR);
- if (chcr & check_bits)
- mask |= USB_DMACHCR_DE | check_bits;
+ if (chcr & (USB_DMACHCR_TE | USB_DMACHCR_SP)) {
+ mask |= USB_DMACHCR_DE | USB_DMACHCR_TE | USB_DMACHCR_SP;
+ if (chcr & USB_DMACHCR_DE)
+ xfer_end = true;
+ ret |= IRQ_HANDLED;
+ }
if (chcr & USB_DMACHCR_NULL) {
/* An interruption of TE will happen after we set FTE */
mask |= USB_DMACHCR_NULL;
chcr |= USB_DMACHCR_FTE;
ret |= IRQ_HANDLED;
}
if (chcr & USB_DMACHCR_NULL) {
/* An interruption of TE will happen after we set FTE */
mask |= USB_DMACHCR_NULL;
chcr |= USB_DMACHCR_FTE;
ret |= IRQ_HANDLED;
}
- usb_dmac_chan_write(chan, USB_DMACHCR, chcr & ~mask);
+ if (mask)
+ usb_dmac_chan_write(chan, USB_DMACHCR, chcr & ~mask);
- if (
chcr & check_bits) {
+ if (
xfer_end)
usb_dmac_isr_transfer_end(chan);
usb_dmac_isr_transfer_end(chan);
- ret |= IRQ_HANDLED;
- }
spin_unlock(&chan->vc.lock);
spin_unlock(&chan->vc.lock);