soc: qcom: llcc: Handle a second device without data corruption
[ Upstream commit f1a1bc8775b26345aba2be278118999e7f661d3d ] Usually there is only one llcc device. But if there were a second, even a failed probe call would modify the global drv_data pointer. So check if drv_data is valid before overwriting it. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Fixes: a3134fb09e0b ("drivers: soc: Add LLCC driver") Link: https://lore.kernel.org/r/20230926083229.2073890-1-u.kleine-koenig@pengutronix.de Signed-off-by: Bjorn Andersson <andersson@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -413,6 +413,9 @@ static int qcom_llcc_probe(struct platform_device *pdev)
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const struct llcc_slice_config *llcc_cfg;
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u32 sz;
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if (!IS_ERR(drv_data))
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return -EBUSY;
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drv_data = devm_kzalloc(dev, sizeof(*drv_data), GFP_KERNEL);
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if (!drv_data) {
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ret = -ENOMEM;
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