[PATCH v2 6/6] drm/tegra: Use u64_to_user_ptr helper

[Mikko Perttunen]

Use the u64_to_user_ptr helper macro to cast IOCTL argument u64 values
to user pointers instead of writing out the cast manually.

Signed-off-by: Mikko Perttunen <mperttu...@nvidia.com>
---
 drivers/gpu/drm/tegra/drm.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index e3331a2bc082..72d5c0021540 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -388,18 +388,21 @@ int tegra_drm_submit(struct tegra_drm_context *context,
        unsigned int num_cmdbufs = args->num_cmdbufs;
        unsigned int num_relocs = args->num_relocs;
        unsigned int num_waitchks = args->num_waitchks;
-       struct drm_tegra_cmdbuf __user *cmdbufs =
-               (void __user *)(uintptr_t)args->cmdbufs;
-       struct drm_tegra_reloc __user *relocs =
-               (void __user *)(uintptr_t)args->relocs;
-       struct drm_tegra_waitchk __user *waitchks =
-               (void __user *)(uintptr_t)args->waitchks;
+       struct drm_tegra_cmdbuf __user *cmdbufs;
+       struct drm_tegra_reloc __user *relocs;
+       struct drm_tegra_waitchk __user *waitchks;
+       struct drm_tegra_syncpt __user *user_syncpt;
        struct drm_tegra_syncpt syncpt;
        struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
        struct host1x_syncpt *sp;
        struct host1x_job *job;
        int err;
 
+       cmdbufs = u64_to_user_ptr(args->cmdbufs);
+       relocs = u64_to_user_ptr(args->relocs);
+       waitchks = u64_to_user_ptr(args->waitchks);
+       user_syncpt = u64_to_user_ptr(args->syncpts);
+
        /* We don't yet support other than one syncpt_incr struct per submit */
        if (args->num_syncpts != 1)
                return -EINVAL;
@@ -520,8 +523,7 @@ int tegra_drm_submit(struct tegra_drm_context *context,
                }
        }
 
-       if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts,
-                          sizeof(syncpt))) {
+       if (copy_from_user(&syncpt, user_syncpt, sizeof(syncpt))) {
                err = -EFAULT;
                goto fail;
        }
-- 
2.14.1