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| author | Luca Weiss <luca@z3ntu.xyz> | 2021-01-30 17:23:49 +0300 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2021-02-03 00:39:13 +0300 |
| commit | 01f937ffc4686837d6c43dea80c6ade6cbd2940a (patch) | |
| tree | c061c89ffb783579811cff10deef9b5e9c2955d0 /drivers/soc/qcom | |
| parent | aec8535edccb943adc067d184af1a3370f5b9568 (diff) | |
| download | linux-01f937ffc4686837d6c43dea80c6ade6cbd2940a.tar.xz | |
soc: qcom: ocmem: don't return NULL in of_get_ocmem
If ocmem probe fails for whatever reason, of_get_ocmem returned NULL.
Without this, users must check for both NULL and IS_ERR on the returned
pointer - which didn't happen in drivers/gpu/drm/msm/adreno/adreno_gpu.c
leading to a NULL pointer dereference.
Reviewed-by: Brian Masney <masneyb@onstation.org>
Fixes: 88c1e9404f1d ("soc: qcom: add OCMEM driver")
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Link: https://lore.kernel.org/r/20210130142349.53335-1-luca@z3ntu.xyz
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/soc/qcom')
| -rw-r--r-- | drivers/soc/qcom/ocmem.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/soc/qcom/ocmem.c b/drivers/soc/qcom/ocmem.c index 7f9e9944d1ea..f1875dc31ae2 100644 --- a/drivers/soc/qcom/ocmem.c +++ b/drivers/soc/qcom/ocmem.c @@ -189,6 +189,7 @@ struct ocmem *of_get_ocmem(struct device *dev) { struct platform_device *pdev; struct device_node *devnode; + struct ocmem *ocmem; devnode = of_parse_phandle(dev->of_node, "sram", 0); if (!devnode || !devnode->parent) { @@ -202,7 +203,12 @@ struct ocmem *of_get_ocmem(struct device *dev) return ERR_PTR(-EPROBE_DEFER); } - return platform_get_drvdata(pdev); + ocmem = platform_get_drvdata(pdev); + if (!ocmem) { + dev_err(dev, "Cannot get ocmem\n"); + return ERR_PTR(-ENODEV); + } + return ocmem; } EXPORT_SYMBOL(of_get_ocmem); |