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Commit 2b3ed754 authored by Yang Yingliang's avatar Yang Yingliang Committed by Greg Kroah-Hartman
Browse files

drm/msm/hdmi: check return value after calling platform_get_resource_byname() 



[ Upstream commit a36e506711548df923ceb7ec9f6001375be799a5 ]

It will cause null-ptr-deref if platform_get_resource_byname() returns NULL,
we need check the return value.

Fixes: c6a57a50 ("drm/msm/hdmi: add hdmi hdcp support (V3)")
Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/482992/
Link: https://lore.kernel.org/r/20220422032227.2991553-1-yangyingliang@huawei.com


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 11709592

drivers/gpu/drm/msm/hdmi/hdmi.c

+4 −0
Original line number Diff line number Diff line
@@ -142,6 +142,10 @@ static struct hdmi *msm_hdmi_init(struct platform_device *pdev) 
	/* HDCP needs physical address of hdmi register */

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,

		config->mmio_name);

	if (!res) {

		ret = -EINVAL;

		goto fail;

	}

	hdmi->mmio_phy_addr = res->start;



	hdmi->qfprom_mmio = msm_ioremap(pdev,