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Subject: media: imx: work around false-positive warning
Author: Arnd Bergmann <a...@arndb.de>
Date: Tue Mar 13 09:14:09 2018 -0400
The IS_ERR()/PTR_ERR() combination confuses gcc to the point that it
cannot prove the upstream_ep variable to be initialized:
drivers/staging/media/imx/imx-media-csi.c: In function 'csi_link_validate':
drivers/staging/media/imx/imx-media-csi.c:1025:20: error: 'upstream_ep' may be
used uninitialized in this function [-Werror=maybe-uninitialized]
priv->upstream_ep = upstream_ep;
~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
drivers/staging/media/imx/imx-media-csi.c:1026:24: error:
'upstream_ep.bus_type' may be used uninitialized in this function
[-Werror=maybe-uninitialized]
is_csi2 = (upstream_ep.bus_type == V4L2_MBUS_CSI2);
~~~~~~~~~~~^~~~~~~~~
drivers/staging/media/imx/imx-media-csi.c:127:19: error:
'upstream_ep.bus.parallel.bus_width' may be used uninitialized in this function
[-Werror=maybe-uninitialized]
I could come up with no good way to rewrite this function, as a last
resort, this adds an explicit zero-intialization of the structure.
Fixes: 52e17089d185 ("media: imx: Don't initialize vars that won't be used")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>
drivers/staging/media/imx/imx-media-csi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/drivers/staging/media/imx/imx-media-csi.c
b/drivers/staging/media/imx/imx-media-csi.c
index 1aa2be891704..00c9d625cfb5 100644
--- a/drivers/staging/media/imx/imx-media-csi.c
+++ b/drivers/staging/media/imx/imx-media-csi.c
@@ -1005,7 +1005,7 @@ static int csi_link_validate(struct v4l2_subdev *sd,
struct v4l2_subdev_format *sink_fmt)
{
struct csi_priv *priv = v4l2_get_subdevdata(sd);
- struct v4l2_fwnode_endpoint upstream_ep;
+ struct v4l2_fwnode_endpoint upstream_ep = {};
const struct imx_media_pixfmt *incc;
bool is_csi2;
int ret;
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