From: Jason Gunthorpe Date: Thu, 5 Aug 2021 22:19:08 -0300 Subject: vfio/ap,ccw: Fix open/close when multiple device FDs are open Git-commit: 9b0d6b7e28a9bbbf4cee0727a299c2107047b1a5 Patch-mainline: v5.15-rc1 References: bsc#1205701 The user can open multiple device FDs if it likes, however these open() functions call vfio_register_notifier() on some device global state. Calling vfio_register_notifier() twice in will trigger a WARN_ON from notifier_chain_register() and the first close will wrongly delete the notifier and more. Since these really want the new open/close_device() semantics just change the functions over. Reviewed-by: Cornelia Huck Signed-off-by: Jason Gunthorpe Link: https://lore.kernel.org/r/12-v4-9ea22c5e6afb+1adf-vfio_reflck_jgg@nvidia.com Signed-off-by: Alex Williamson Acked-by: Joerg Roedel --- drivers/s390/cio/vfio_ccw_ops.c | 8 ++++---- drivers/s390/crypto/vfio_ap_ops.c | 8 ++++---- 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index c57d2a7f0919..7f540ad0b568 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -159,7 +159,7 @@ static int vfio_ccw_mdev_remove(struct mdev_device *mdev) return 0; } -static int vfio_ccw_mdev_open(struct mdev_device *mdev) +static int vfio_ccw_mdev_open_device(struct mdev_device *mdev) { struct vfio_ccw_private *private = dev_get_drvdata(mdev_parent_dev(mdev)); @@ -194,7 +194,7 @@ static int vfio_ccw_mdev_open(struct mdev_device *mdev) return ret; } -static void vfio_ccw_mdev_release(struct mdev_device *mdev) +static void vfio_ccw_mdev_close_device(struct mdev_device *mdev) { struct vfio_ccw_private *private = dev_get_drvdata(mdev_parent_dev(mdev)); @@ -638,8 +638,8 @@ static const struct mdev_parent_ops vfio_ccw_mdev_ops = { .supported_type_groups = mdev_type_groups, .create = vfio_ccw_mdev_create, .remove = vfio_ccw_mdev_remove, - .open = vfio_ccw_mdev_open, - .release = vfio_ccw_mdev_release, + .open_device = vfio_ccw_mdev_open_device, + .close_device = vfio_ccw_mdev_close_device, .read = vfio_ccw_mdev_read, .write = vfio_ccw_mdev_write, .ioctl = vfio_ccw_mdev_ioctl, diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 122c85c22469..cee5626fe0a4 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -1315,7 +1315,7 @@ static int vfio_ap_mdev_reset_queues(struct mdev_device *mdev) return rc; } -static int vfio_ap_mdev_open(struct mdev_device *mdev) +static int vfio_ap_mdev_open_device(struct mdev_device *mdev) { struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); unsigned long events; @@ -1348,7 +1348,7 @@ static int vfio_ap_mdev_open(struct mdev_device *mdev) return ret; } -static void vfio_ap_mdev_release(struct mdev_device *mdev) +static void vfio_ap_mdev_close_device(struct mdev_device *mdev) { struct ap_matrix_mdev *matrix_mdev = mdev_get_drvdata(mdev); @@ -1427,8 +1427,8 @@ static const struct mdev_parent_ops vfio_ap_matrix_ops = { .mdev_attr_groups = vfio_ap_mdev_attr_groups, .create = vfio_ap_mdev_create, .remove = vfio_ap_mdev_remove, - .open = vfio_ap_mdev_open, - .release = vfio_ap_mdev_release, + .open_device = vfio_ap_mdev_open_device, + .close_device = vfio_ap_mdev_close_device, .ioctl = vfio_ap_mdev_ioctl, };