diff options
Diffstat (limited to 'drivers/virtio/virtio_pci_common.c')
-rw-r--r-- | drivers/virtio/virtio_pci_common.c | 23 |
1 files changed, 2 insertions, 21 deletions
diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c index fdbde1db5ec5..3f51fdb7be45 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -30,16 +30,8 @@ void vp_disable_cbs(struct virtio_device *vdev) struct virtio_pci_device *vp_dev = to_vp_device(vdev); int i; - if (vp_dev->intx_enabled) { - /* - * The below synchronize() guarantees that any - * interrupt for this line arriving after - * synchronize_irq() has completed is guaranteed to see - * intx_soft_enabled == false. - */ - WRITE_ONCE(vp_dev->intx_soft_enabled, false); + if (vp_dev->intx_enabled) synchronize_irq(vp_dev->pci_dev->irq); - } for (i = 0; i < vp_dev->msix_vectors; ++i) disable_irq(pci_irq_vector(vp_dev->pci_dev, i)); @@ -51,16 +43,8 @@ void vp_enable_cbs(struct virtio_device *vdev) struct virtio_pci_device *vp_dev = to_vp_device(vdev); int i; - if (vp_dev->intx_enabled) { - disable_irq(vp_dev->pci_dev->irq); - /* - * The above disable_irq() provides TSO ordering and - * as such promotes the below store to store-release. - */ - WRITE_ONCE(vp_dev->intx_soft_enabled, true); - enable_irq(vp_dev->pci_dev->irq); + if (vp_dev->intx_enabled) return; - } for (i = 0; i < vp_dev->msix_vectors; ++i) enable_irq(pci_irq_vector(vp_dev->pci_dev, i)); @@ -113,9 +97,6 @@ static irqreturn_t vp_interrupt(int irq, void *opaque) struct virtio_pci_device *vp_dev = opaque; u8 isr; - if (!READ_ONCE(vp_dev->intx_soft_enabled)) - return IRQ_NONE; - /* reading the ISR has the effect of also clearing it so it's very * important to save off the value. */ isr = ioread8(vp_dev->isr); |