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vfio: platform: add dev_info on device reset

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It might be helpful for the end-user to check the device reset
function was found by the vfio platform reset framework.

Lets store a pointer to the struct device in vfio_platform_device
and trace when the reset function is called or not found.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Eric Auger 2015-11-03 18:12:18 +00:00 committed by Alex Williamson
parent e9e0506ee6
commit 705e60bae3
2 changed files with 13 additions and 2 deletions
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14
drivers/vfio/platform/vfio_platform_common.c
View file

@ -144,8 +144,12 @@ static void vfio_platform_release(void *device_data)
mutex_lock(&driver_lock);
if (!(--vdev->refcnt)) {
if (vdev->reset)
if (vdev->reset) {
dev_info(vdev->device, "reset\n");
vdev->reset(vdev);
} else {
dev_warn(vdev->device, "no reset function found!\n");
}
vfio_platform_regions_cleanup(vdev);
vfio_platform_irq_cleanup(vdev);
}
@ -174,8 +178,12 @@ static int vfio_platform_open(void *device_data)
if (ret)
goto err_irq;
if (vdev->reset)
if (vdev->reset) {
dev_info(vdev->device, "reset\n");
vdev->reset(vdev);
} else {
dev_warn(vdev->device, "no reset function found!\n");
}
}
vdev->refcnt++;
@ -551,6 +559,8 @@ int vfio_platform_probe_common(struct vfio_platform_device *vdev,
return -EINVAL;
}
vdev->device = dev;
group = iommu_group_get(dev);
if (!group) {
pr_err("VFIO: No IOMMU group for device %s\n", vdev->name);

1
drivers/vfio/platform/vfio_platform_private.h
View file

@ -59,6 +59,7 @@ struct vfio_platform_device {
struct module *parent_module;
const char *compat;
struct module *reset_module;
struct device *device;
/*
* These fields should be filled by the bus specific binder