[PATCH linux-next] drm/modes: use strscpy() to instead of strncpy()

[PATCH linux-next] drm/modes: use strscpy() to instead of strncpy()

[yang.yang29]

From: Xu Panda <xu.panda@zte.com.cn>

The implementation of strscpy() is more robust and safer.
That's now the recommended way to copy NUL terminated strings.

Signed-off-by: Xu Panda <xu.panda@zte.com.cn>
Signed-off-by: Yang Yang <yang.yang29@zte.com>
---
 drivers/gpu/drm/drm_modes.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 3c8034a8c27b..cb08b247d8c3 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -2081,8 +2081,7 @@ void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
 		break;
 	}

-	strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
-	out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
+	strscpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
 }

 /**
@@ -2123,8 +2122,7 @@ int drm_mode_convert_umode(struct drm_device *dev,
 	 * useful for the kernel->userspace direction anyway.
 	 */
 	out->type = in->type & DRM_MODE_TYPE_ALL;
-	strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
-	out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
+	strscpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);

 	/* Clearing picture aspect ratio bits from out flags,
 	 * as the aspect-ratio information is not stored in
-- 
2.15.2