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drm/exynos: fix a potential error pointer dereference
[ Upstream commit 73bf1c9ae6
]
Smatch reports the warning below:
drivers/gpu/drm/exynos/exynos_hdmi.c:1864 hdmi_bind()
error: 'crtc' dereferencing possible ERR_PTR()
The return value of exynos_drm_crtc_get_by_type maybe ERR_PTR(-ENODEV),
which can not be used directly. Fix this by checking the return value
before using it.
Signed-off-by: Xiang Yang <xiangyang3@huawei.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 2 additions and 0 deletions
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@ -1861,6 +1861,8 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data)
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return ret;
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crtc = exynos_drm_crtc_get_by_type(drm_dev, EXYNOS_DISPLAY_TYPE_HDMI);
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if (IS_ERR(crtc))
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return PTR_ERR(crtc);
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crtc->pipe_clk = &hdata->phy_clk;
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ret = hdmi_create_connector(encoder);
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