diff options
Diffstat (limited to 'drivers/vfio/platform/vfio_platform_common.c')
| -rw-r--r-- | drivers/vfio/platform/vfio_platform_common.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c index 4c27f4be3c3d..c0cd824be2b7 100644 --- a/drivers/vfio/platform/vfio_platform_common.c +++ b/drivers/vfio/platform/vfio_platform_common.c @@ -17,6 +17,7 @@ #include <linux/iommu.h> #include <linux/module.h> #include <linux/mutex.h> +#include <linux/pm_runtime.h> #include <linux/slab.h> #include <linux/types.h> #include <linux/uaccess.h> @@ -239,6 +240,7 @@ static void vfio_platform_release(void *device_data) ret, extra_dbg ? extra_dbg : ""); WARN_ON(1); } + pm_runtime_put(vdev->device); vfio_platform_regions_cleanup(vdev); vfio_platform_irq_cleanup(vdev); } @@ -269,6 +271,10 @@ static int vfio_platform_open(void *device_data) if (ret) goto err_irq; + ret = pm_runtime_get_sync(vdev->device); + if (ret < 0) + goto err_pm; + ret = vfio_platform_call_reset(vdev, &extra_dbg); if (ret && vdev->reset_required) { dev_warn(vdev->device, "reset driver is required and reset call failed in open (%d) %s\n", @@ -283,6 +289,8 @@ static int vfio_platform_open(void *device_data) return 0; err_rst: + pm_runtime_put(vdev->device); +err_pm: vfio_platform_irq_cleanup(vdev); err_irq: vfio_platform_regions_cleanup(vdev); @@ -630,8 +638,7 @@ static int vfio_platform_of_probe(struct vfio_platform_device *vdev, ret = device_property_read_string(dev, "compatible", &vdev->compat); if (ret) - pr_err("VFIO: cannot retrieve compat for %s\n", - vdev->name); + pr_err("VFIO: Cannot retrieve compat for %s\n", vdev->name); return ret; } @@ -673,7 +680,7 @@ int vfio_platform_probe_common(struct vfio_platform_device *vdev, ret = vfio_platform_get_reset(vdev); if (ret && vdev->reset_required) { - pr_err("vfio: no reset function found for device %s\n", + pr_err("VFIO: No reset function found for device %s\n", vdev->name); return ret; } @@ -681,18 +688,24 @@ int vfio_platform_probe_common(struct vfio_platform_device *vdev, group = vfio_iommu_group_get(dev); if (!group) { pr_err("VFIO: No IOMMU group for device %s\n", vdev->name); - return -EINVAL; + ret = -EINVAL; + goto put_reset; } ret = vfio_add_group_dev(dev, &vfio_platform_ops, vdev); - if (ret) { - vfio_iommu_group_put(group, dev); - return ret; - } + if (ret) + goto put_iommu; mutex_init(&vdev->igate); + pm_runtime_enable(vdev->device); return 0; + +put_iommu: + vfio_iommu_group_put(group, dev); +put_reset: + vfio_platform_put_reset(vdev); + return ret; } EXPORT_SYMBOL_GPL(vfio_platform_probe_common); @@ -703,6 +716,7 @@ struct vfio_platform_device *vfio_platform_remove_common(struct device *dev) vdev = vfio_del_group_dev(dev); if (vdev) { + pm_runtime_disable(vdev->device); vfio_platform_put_reset(vdev); vfio_iommu_group_put(dev->iommu_group, dev); } |