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video: rk3288_mipi: check in rk_mipi_ofdata_to_platdata

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The error checking should also catch the case that no range has beeen
defined.
syscon_get_first_range() returns NULL if no range is defined.
cf. rk3399_mipi.c

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
This commit is contained in:
Heinrich Schuchardt 2018-03-18 15:25:41 +01:00 committed by Philipp Tomsich
parent a89c725d2c
commit 0ea91c3240
1 changed files with 1 additions and 1 deletions
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drivers/video/rockchip/rk3288_mipi.c
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@ -136,7 +136,7 @@ static int rk_mipi_ofdata_to_platdata(struct udevice *dev)
struct rk_mipi_priv *priv = dev_get_priv(dev);
priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
if (IS_ERR(priv->grf)) {
if (!priv->grf || IS_ERR(priv->grf)) {
debug("%s: Get syscon grf failed (ret=%p)\n",
__func__, priv->grf);
return -ENXIO;