[PATCH v2 4/6] vfio: platform: add compat in vfio_platform_device

Eric Auger
2015-10-22T09:42:00Z

Let's retrieve the compatibility string on probe and store it
in the vfio_platform_device struct

Signed-off-by: Eric Auger <eric.auger@linaro.org>
---
drivers/vfio/platform/vfio_platform_common.c | 15 ++++++++-------
drivers/vfio/platform/vfio_platform_private.h | 1 +
2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
index 52a4c7b..e7d615f 100644
--- a/drivers/vfio/platform/vfio_platform_common.c
+++ b/drivers/vfio/platform/vfio_platform_common.c
@@ -45,16 +45,11 @@ static const struct vfio_platform_reset_combo reset_lookup_table[] = {
static void vfio_platform_get_reset(struct vfio_platform_device *vdev,
struct device *dev)
{
- const char *compat;
int (*reset)(struct vfio_platform_device *);
- int ret, i;
-
- ret = device_property_read_string(dev, "compatible", &compat);
- if (ret)
- return;
+ int i;

for (i = 0 ; i < ARRAY_SIZE(reset_lookup_table); i++) {
- if (!strcmp(reset_lookup_table[i].compat, compat)) {
+ if (!strcmp(reset_lookup_table[i].compat, vdev->compat)) {
request_module(reset_lookup_table[i].module_name);
reset = __symbol_get(
reset_lookup_table[i].reset_function_name);
@@ -545,6 +540,12 @@ int vfio_platform_probe_common(struct vfio_platform_device *vdev,
struct iommu_group *group;
int ret;

+ ret = device_property_read_string(dev, "compatible", &vdev->compat);
+ if (ret) {
+ pr_err("VFIO: cannot retrieve compat for %s\n", vdev->name);
+ return -EINVAL;
+ }
+
if (!vdev)
return -EINVAL;

diff --git a/drivers/vfio/platform/vfio_platform_private.h b/drivers/vfio/platform/vfio_platform_private.h
index 1fb1410..620ee40 100644
--- a/drivers/vfio/platform/vfio_platform_private.h
+++ b/drivers/vfio/platform/vfio_platform_private.h
@@ -56,6 +56,7 @@ struct vfio_platform_device {
u32 num_irqs;
int refcnt;
struct mutex igate;
+ const char *compat;

/*
* These fields should be filled by the bus specific binder
--
1.9.1