drm/exynos: make sure to handle an error case to vm_mmap call

vm_mmap function returns unsigned long so addr type should be unsigned long.
a pointer or address variable is required to use unsigned long or uint64_t
type for 64bits address support.

So this patch makes sure that addr has unsigned long type and also
exynos_drm_gem_mmap_ioctl returns correct error type.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index 5af14782fcfe..c3f15e7646d5 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -420,7 +420,7 @@ int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
 {
         struct drm_exynos_gem_mmap *args = data;
         struct drm_gem_object *obj;
-        unsigned int addr;
+        unsigned long addr;
 
         if (!(dev->driver->driver_features & DRIVER_GEM)) {
                 DRM_ERROR("does not support GEM.\n");
@@ -462,14 +462,14 @@ int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
 
         drm_gem_object_unreference(obj);
 
-        if (IS_ERR((void *)addr)) {
+        if (IS_ERR_VALUE(addr)) {
                 /* check filp->f_op, filp->private_data are restored */
                 if (file_priv->filp->f_op == &exynos_drm_gem_fops) {
                         file_priv->filp->f_op = fops_get(dev->driver->fops);
                         file_priv->filp->private_data = file_priv;
                 }
                 mutex_unlock(&dev->struct_mutex);
-                return PTR_ERR((void *)addr);
+                return (int)addr;
         }
 
         mutex_unlock(&dev->struct_mutex);