vfio: platform: introduce vfio-platform-base module
To prepare for vfio platform reset rework let's build
vfio_platform_common.c and vfio_platform_irq.c in a separate
module from vfio-platform and vfio-amba. This makes possible
to have separate module inits and works around a race between
platform driver init and vfio reset module init: that way we
make sure symbols exported by base are available when vfio-platform
driver gets probed.
The open/release being implemented in the base module, the ref
count is applied to the parent module instead.
Signed-off-by: Eric Auger <eric.auger@linaro.org>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
index 8c216de..7f69b85 100644
--- a/drivers/vfio/platform/vfio_platform_common.c
+++ b/drivers/vfio/platform/vfio_platform_common.c
@@ -23,6 +23,10 @@
#include "vfio_platform_private.h"
+#define DRIVER_VERSION "0.10"
+#define DRIVER_AUTHOR "Antonios Motakis <a.motakis@virtualopensystems.com>"
+#define DRIVER_DESC "VFIO platform base module"
+
static DEFINE_MUTEX(driver_lock);
static const struct vfio_platform_reset_combo reset_lookup_table[] = {
@@ -146,7 +150,7 @@
mutex_unlock(&driver_lock);
- module_put(THIS_MODULE);
+ module_put(vdev->parent_module);
}
static int vfio_platform_open(void *device_data)
@@ -154,7 +158,7 @@
struct vfio_platform_device *vdev = device_data;
int ret;
- if (!try_module_get(THIS_MODULE))
+ if (!try_module_get(vdev->parent_module))
return -ENODEV;
mutex_lock(&driver_lock);
@@ -573,3 +577,8 @@
return vdev;
}
EXPORT_SYMBOL_GPL(vfio_platform_remove_common);
+
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);