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thermal/drivers/qcom/lmh: Check for SCM availability at probe 

commit d9d3490c48 upstream.

Up until now, the necessary scm availability check has not been
performed, leading to possible null pointer dereferences (which did
happen for me on RB1).

Fix that.

Fixes: 53bca371cd ("thermal/drivers/qcom: Add support for LMh driver")
Cc: <stable@vger.kernel.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20240308-topic-rb1_lmh-v2-2-bac3914b0fe3@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Konrad Dybcio 2024-03-09 14:15:03 +01:00 committed by Greg Kroah-Hartman
parent c422e1d407
commit 2226b145af
1 changed files with 3 additions and 0 deletions
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3
drivers/thermal/qcom/lmh.c
View File

@ -92,6 +92,9 @@ static int lmh_probe(struct platform_device *pdev)
int temp_low, temp_high, temp_arm, cpu_id, ret;
u32 node_id;
if (!qcom_scm_is_available())
return -EPROBE_DEFER;
lmh_data = devm_kzalloc(dev, sizeof(*lmh_data), GFP_KERNEL);
if (!lmh_data)
return -ENOMEM;