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    Subject[PATCH 4.14 126/189] drm/omap: check return value from soc_device_match
    Date
    4.14-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Tomi Valkeinen <tomi.valkeinen@ti.com>

    [ Upstream commit 4d6cb5e2fee52af17001e92950f0894304706ee4 ]

    soc_device_match() can return NULL, so add a check and fail if
    soc_device_match() fails.

    Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
    Link: https://patchwork.freedesktop.org/patch/msgid/20180502091159.7071-2-tomi.valkeinen@ti.com
    Reviewed-by: Benoit Parrot <bparrot@ti.com>
    Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
    Signed-off-by: Sean Paul <seanpaul@chromium.org>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/gpu/drm/omapdrm/dss/hdmi4_core.c | 7 ++++++-
    1 file changed, 6 insertions(+), 1 deletion(-)

    --- a/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c
    +++ b/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c
    @@ -926,8 +926,13 @@ int hdmi4_core_init(struct platform_devi
    {
    const struct hdmi4_features *features;
    struct resource *res;
    + const struct soc_device_attribute *soc;

    - features = soc_device_match(hdmi4_soc_devices)->data;
    + soc = soc_device_match(hdmi4_soc_devices);
    + if (!soc)
    + return -ENODEV;
    +
    + features = soc->data;
    core->cts_swmode = features->cts_swmode;
    core->audio_use_mclk = features->audio_use_mclk;


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