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clk: qcom: camcc-sc8280xp: Prevent error pointer dereference

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If "regmap" is an error pointer then calling regmap_update_bits() will
crash.  We only need to call regmap_update_bits() if we had written to
it earlier.

Fixes: ff93872a9c ("clk: qcom: camcc-sc8280xp: Add sc8280xp CAMCC")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/210d48ce-6ebc-4a6b-b30f-866d10d41a16@moroto.mountain
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
Dan Carpenter 2023-12-12 12:21:51 +03:00 committed by Bjorn Andersson
parent f6bda45310
commit df14d21410
1 changed files with 3 additions and 2 deletions
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5
drivers/clk/qcom/camcc-sc8280xp.c
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@ -3017,14 +3017,15 @@ static int camcc_sc8280xp_probe(struct platform_device *pdev)
ret = qcom_cc_really_probe(pdev, &camcc_sc8280xp_desc, regmap);
if (ret)
goto err_put_rpm;
goto err_disable;
pm_runtime_put(&pdev->dev);
return 0;
err_put_rpm:
err_disable:
regmap_update_bits(regmap, 0xc1e4, BIT(0), 0);
err_put_rpm:
pm_runtime_put_sync(&pdev->dev);
return ret;