| Message ID | 20240911115253.10920-5-johan+linaro@kernel.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | phy: qcom: qmp-usb: fix NULL-deref on runtime suspend | expand |
On Wed, Sep 11, 2024 at 01:52:53PM +0200, Johan Hovold wrote: > Commit 44aff8e31080 ("phy: qcom-qmp-combo: clean up probe > initialisation") removed most users of the platform device driver data, > but mistakenly also removed the initialisation despite the data still > being used in the runtime PM callbacks. Perhaps the copy/paste error in Subject can be fixed when applying. The summary was supposed to say: phy: qcom: qmp-combo: move driver data initialisation earlier and nothing else. Johan
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c index c478bf74817a..ddecf34968fd 100644 --- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c +++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c @@ -3649,6 +3649,7 @@ static int qmp_combo_probe(struct platform_device *pdev) return -ENOMEM; qmp->dev = dev; + dev_set_drvdata(dev, qmp); qmp->orientation = TYPEC_ORIENTATION_NORMAL; @@ -3725,8 +3726,6 @@ static int qmp_combo_probe(struct platform_device *pdev) phy_set_drvdata(qmp->dp_phy, qmp); - dev_set_drvdata(dev, qmp); - if (usb_np == dev->of_node) phy_provider = devm_of_phy_provider_register(dev, qmp_combo_phy_xlate); else
Commit 44aff8e31080 ("phy: qcom-qmp-combo: clean up probe initialisation") removed most users of the platform device driver data, but mistakenly also removed the initialisation despite the data still being used in the runtime PM callbacks. The initialisation was soon after restored by commit 83a0bbe39b17 ("phy: qcom-qmp-combo: add support for updated sc8280xp binding") but now happens slightly later during probe. This should not cause any trouble currently as runtime PM needs to be enabled manually through sysfs and the platform device would not be suspended before the PHY has been registered anyway. Move the driver data initialisation to avoid a NULL-pointer dereference on runtime suspend if runtime PM is ever enabled by default in this driver. Fixes: 44aff8e31080 ("phy: qcom-qmp-combo: clean up probe initialisation") Signed-off-by: Johan Hovold <johan+linaro@kernel.org> --- drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)