diff options
| author | Yang Yingliang <yangyingliang@huawei.com> | 2022-04-22 06:22:27 +0300 |
|---|---|---|
| committer | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2022-05-02 02:39:34 +0300 |
| commit | a36e506711548df923ceb7ec9f6001375be799a5 (patch) | |
| tree | 04fda7e4d9814fa3b0010aec9cf6f92b1e176b96 /drivers/gpu/drm/msm/hdmi/hdmi.c | |
| parent | f0e7e9ed379c012c4d6b09a09b868accc426223c (diff) | |
| download | linux-a36e506711548df923ceb7ec9f6001375be799a5.tar.xz | |
drm/msm/hdmi: check return value after calling platform_get_resource_byname()
It will cause null-ptr-deref if platform_get_resource_byname() returns NULL,
we need check the return value.
Fixes: c6a57a50ad56 ("drm/msm/hdmi: add hdmi hdcp support (V3)")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Dmitry 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: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Diffstat (limited to 'drivers/gpu/drm/msm/hdmi/hdmi.c')
| -rw-r--r-- | drivers/gpu/drm/msm/hdmi/hdmi.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c index baa6f1aaadf6..05c5567a19da 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c @@ -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, config->qfprom_mmio_name); |