linux-kernel - [PATCH v2 2/4] drm/framebuffer: Fix use of uninitialized variable

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Date:   Fri, 03 Nov 2023 15:14:04 +0200
From:   Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Francesco Dolcini <francesco.dolcini@...adex.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Parshuram Thombare <pthombar@...ence.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
Subject: [PATCH v2 2/4] drm/framebuffer: Fix use of uninitialized variable

smatch reports:

drivers/gpu/drm/drm_framebuffer.c:654 drm_mode_getfb2_ioctl() error: uninitialized symbol 'ret'.

'ret' is possibly not set when there are no errors, causing the error
above. I can't say if that ever happens in real-life, but in any case I
think it is good to initialize 'ret' to 0.

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
---
 drivers/gpu/drm/drm_framebuffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c
index 09e289fca5c3..3cc0ffc28e86 100644
--- a/drivers/gpu/drm/drm_framebuffer.c
+++ b/drivers/gpu/drm/drm_framebuffer.c
@@ -583,7 +583,7 @@ int drm_mode_getfb2_ioctl(struct drm_device *dev,
 	struct drm_mode_fb_cmd2 *r = data;
 	struct drm_framebuffer *fb;
 	unsigned int i;
-	int ret;
+	int ret = 0;
 
 	if (!drm_core_check_feature(dev, DRIVER_MODESET))
 		return -EINVAL;

-- 
2.34.1