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| author | Colin Ian King <colin.king@canonical.com> | 2020-12-07 16:09:37 +0100 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-12-08 13:56:02 +0100 |
| commit | b097efba9580d1f7cbc80cda84e768983e3de541 (patch) | |
| tree | 512897539c0b465e1d3446b6a8d6505f338d081a | |
| parent | phy: ingenic: depend on HAS_IOMEM (diff) | |
| download | linux-b097efba9580d1f7cbc80cda84e768983e3de541.tar.xz linux-b097efba9580d1f7cbc80cda84e768983e3de541.zip | |
drm/mediatek: avoid dereferencing a null hdmi_phy on an error message
Currently there is a null pointer check for hdmi_phy that implies it
may be null, however a dev_err messages dereferences this potential null
pointer. Avoid a null pointer dereference by only emitting the dev_err
message if hdmi_phy is non-null. It is a moot point if the error message
needs to be printed at all, but since this is a relatively new piece of
code it may be useful to keep the message in for the moment in case there
are unforseen errors that need to be reported.
Fixes: be28b6507c46 ("drm/mediatek: separate hdmi phy to different file")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Addresses-Coverity: ("Dereference after null check")
Link: https://lore.kernel.org/r/20201207150937.170435-1-colin.king@canonical.com
[vkoul: fix indent of return call]
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/phy/mediatek/phy-mtk-hdmi.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/phy/mediatek/phy-mtk-hdmi.c b/drivers/phy/mediatek/phy-mtk-hdmi.c index c5c61f5a9ea0..45be8aa724f3 100644 --- a/drivers/phy/mediatek/phy-mtk-hdmi.c +++ b/drivers/phy/mediatek/phy-mtk-hdmi.c @@ -84,8 +84,9 @@ mtk_hdmi_phy_dev_get_ops(const struct mtk_hdmi_phy *hdmi_phy) hdmi_phy->conf->hdmi_phy_disable_tmds) return &mtk_hdmi_phy_dev_ops; - dev_err(hdmi_phy->dev, "Failed to get dev ops of phy\n"); - return NULL; + if (hdmi_phy) + dev_err(hdmi_phy->dev, "Failed to get dev ops of phy\n"); + return NULL; } static void mtk_hdmi_phy_clk_get_data(struct mtk_hdmi_phy *hdmi_phy, |