On Mon, 9 Jul 2018 20:01:06 +0800
Jeff Guo <jia....@intel.com> wrote:
> @@ -195,12 +205,22 @@ igbuio_pci_irqhandler(int irq, void *dev_id)
> {
> struct rte_uio_pci_dev *udev = (struct rte_uio_pci_dev *)dev_id;
> struct uio_info *info = &udev->info;
> + struct pci_dev *pdev = udev->pdev;
>
> /* Legacy mode need to mask in hardware */
> if (udev->mode == RTE_INTR_MODE_LEGACY &&
> !pci_check_and_mask_intx(udev->pdev))
> return IRQ_NONE;
>
> + mutex_lock(&udev->lock);
> + /* check the uevent of the kobj */
> + if ((&pdev->dev.kobj)->state_remove_uevent_sent == 1) {
> + dev_notice(&pdev->dev, "device:%s, sent remove uevent!\n",
> + (&pdev->dev.kobj)->name);
> + udev->state = RTE_UDEV_UNPLUG;
> + }
> + mutex_unlock(&udev->lock);
Did you run with lockdep?
I don't think you can safely acquire a mutex (would sleep) in IRQ context.
