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dwc3-msm-core: Add NULL check with dwc3_msm_override_pm_ops() API

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dwc3 msm core driver shall start USB host or device mode with dwc3
controller driver. This shall fail specifically USB host mode due
to any error with xhci controller initialization. In this case HCD
would be unbinded causing NULL pointer deference when trying to
override its PM ops with dwc3_msm_override_pm_ops() API. To avoid
NULL pointer dereference add NULL check with dwc3_msm_override_pm_ops()
API.

Change-Id: Ia96e945d58b1bf1d5434b004ac3d3090b24c6208
Signed-off-by: Mayank Rana <quic_mrana@quicinc.com>
This commit is contained in:
Mayank Rana 2022-08-01 15:23:01 -07:00 committed by Gerrit - the friendly Code Review server
parent 3912c8275c
commit 727bbb3139
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/dwc3/dwc3-msm-core.c
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@ -5329,6 +5329,11 @@ static void dwc3_core_complete(struct device *dev);
static void dwc3_msm_override_pm_ops(struct device *dev, struct dev_pm_ops *pm_ops,
bool is_host)
{
if (!dev->driver || !dev->driver->pm) {
dev_err(dev, "can't override PM OPs\n");
return;
}
(*pm_ops) = (*dev->driver->pm);
pm_ops->prepare = is_host ? dwc3_host_prepare : dwc3_core_prepare;
pm_ops->complete = is_host ? dwc3_host_complete : dwc3_core_complete;