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authorEric Auger <eric.auger@linaro.org>2015-11-03 18:12:18 +0000
committerAlex Williamson <alex.williamson@redhat.com>2015-11-03 12:55:05 -0700
commit705e60bae3e09bedba0b2ec936bce3f799f46426 (patch)
treeab602112e5d9ae894bdbd7bf7963250541e2a24c /drivers/vfio
parente9e0506ee60dd79714c59457f4301c602786defc (diff)
downloadlinux-705e60bae3e09bedba0b2ec936bce3f799f46426.tar.bz2
vfio: platform: add dev_info on device reset
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>
Diffstat (limited to 'drivers/vfio')
-rw-r--r--drivers/vfio/platform/vfio_platform_common.c14
-rw-r--r--drivers/vfio/platform/vfio_platform_private.h1
2 files changed, 13 insertions, 2 deletions
diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
index ac0229622c1f..a1c50d630792 100644
--- a/drivers/vfio/platform/vfio_platform_common.c
+++ b/drivers/vfio/platform/vfio_platform_common.c
@@ -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);
diff --git a/drivers/vfio/platform/vfio_platform_private.h b/drivers/vfio/platform/vfio_platform_private.h
index d1b0668fe394..42816dd280cb 100644
--- a/drivers/vfio/platform/vfio_platform_private.h
+++ b/drivers/vfio/platform/vfio_platform_private.h
@@ -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