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virtio-mmio: ack the interrupt as soon as possible

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Follow the linux does, avoid miss mmio interrupt

Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
This commit is contained in:
Bowen Wang
2023-10-07 19:29:20 +08:00
committed by Xiang Xiao
parent 222ca5b040
commit 409431b2ad
1 changed files with 1 additions and 1 deletions
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drivers/virtio/virtio-mmio.c
+1 -1
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@@ -721,6 +721,7 @@ static int virtio_mmio_interrupt(int irq, FAR void *context, FAR void *arg)
uint32_t isr; uint32_t isr;
isr = metal_io_read32(&vmdev->cfg_io, VIRTIO_MMIO_INTERRUPT_STATUS); isr = metal_io_read32(&vmdev->cfg_io, VIRTIO_MMIO_INTERRUPT_STATUS);
metal_io_write32(&vmdev->cfg_io, VIRTIO_MMIO_INTERRUPT_ACK, isr);
if (isr & VIRTIO_MMIO_INTERRUPT_VRING) if (isr & VIRTIO_MMIO_INTERRUPT_VRING)
{ {
for (i = 0; i < vmdev->vdev.vrings_num; i++) for (i = 0; i < vmdev->vdev.vrings_num; i++)
@@ -734,7 +735,6 @@ static int virtio_mmio_interrupt(int irq, FAR void *context, FAR void *arg)
} }
} }
metal_io_write32(&vmdev->cfg_io, VIRTIO_MMIO_INTERRUPT_ACK, isr);
return OK; return OK;
} }