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usb: dwc3: rockchip: fix otg plug out error before resume

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ID dig disconnect interrupt will happen and notify dwc3 controller
to remove hcd as soon as resume, and release root hub, but the hcd
has not resume, so there is a logic error and it may result in NULL
pointer, this patch forbid remove hcd when the state of hcd is suspend.

Change-Id: Ia5673848a23528cd053d75910c0fdbddf0927a40
Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>
This commit is contained in:
Meng Dongyang
2016-10-07 13:50:59 +08:00
committed by Huang, Tao
parent 22e5631e63
commit ccc954ee9f
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/dwc3/dwc3-rockchip.c
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@@ -210,6 +210,11 @@ static void dwc3_rockchip_otg_extcon_evt_work(struct work_struct *work)
DWC3_GCTL_PRTCAP(reg) == DWC3_GCTL_PRTCAP_OTG) {
hcd = dev_get_drvdata(&dwc->xhci->dev);
if (hcd->state == HC_STATE_SUSPENDED) {
dev_dbg(rockchip->dev, "USB suspended\n");
goto out;
}
if (hcd->state != HC_STATE_HALT) {
usb_remove_hcd(hcd->shared_hcd);
usb_remove_hcd(hcd);