On 5/24/22 6:50 PM, Alex Williamson wrote:
On Tue, 24 May 2022 14:58:56 -0400 Matthew Rosato <mjrosato@xxxxxxxxxxxxx> wrote:diff --git a/arch/s390/kvm/pci.c b/arch/s390/kvm/pci.c new file mode 100644 index 000000000000..21c2be5c2713 --- /dev/null +++ b/arch/s390/kvm/pci.c @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * s390 kvm PCI passthrough support + * + * Copyright IBM Corp. 2022 + * + * Author(s): Matthew Rosato <mjrosato@xxxxxxxxxxxxx> + */ + +#include <linux/kvm_host.h> +#include <linux/pci.h> +#include "pci.h" + +static int kvm_s390_pci_dev_open(struct zpci_dev *zdev) +{ + struct kvm_zdev *kzdev; + + kzdev = kzalloc(sizeof(struct kvm_zdev), GFP_KERNEL); + if (!kzdev) + return -ENOMEM; + + kzdev->zdev = zdev; + zdev->kzdev = kzdev; + + return 0; +} + +static void kvm_s390_pci_dev_release(struct zpci_dev *zdev) +{ + struct kvm_zdev *kzdev; + + kzdev = zdev->kzdev; + WARN_ON(kzdev->zdev != zdev); + zdev->kzdev = 0;I imagine this should be s/0/NULL/, right? I feel like there was a recent similar discussion, but I can't think of any unique search terms to sort it out of my inbox. Thanks,
Yup, I recall a similar comment on a prior version but I don't recall if it was this particular patch or not -- anyway will change
