(nuttx) branch master updated: virtio-mmio: ack the interrupt as soon as possible

[xiaoxiang]

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xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/nuttx.git


The following commit(s) were added to refs/heads/master by this push:
     new 409431b2ad virtio-mmio: ack the interrupt as soon as possible
409431b2ad is described below

commit 409431b2ad03d2aa7d0d4a345eaf12cba11aa81c
Author: Bowen Wang <wangbow...@xiaomi.com>
AuthorDate: Sat Oct 7 19:29:20 2023 +0800

    virtio-mmio: ack the interrupt as soon as possible
    
    Follow the linux does, avoid miss mmio interrupt
    
    Signed-off-by: Bowen Wang <wangbow...@xiaomi.com>
---
 drivers/virtio/virtio-mmio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/virtio/virtio-mmio.c b/drivers/virtio/virtio-mmio.c
index b9d1f90ebb..663f286554 100644
--- a/drivers/virtio/virtio-mmio.c
+++ b/drivers/virtio/virtio-mmio.c
@@ -721,6 +721,7 @@ static int virtio_mmio_interrupt(int irq, FAR void 
*context, FAR void *arg)
   uint32_t isr;
 
   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)
     {
       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;
 }