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usb: dwc3: rockchip: fix xhci NULL pointer dereference

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If DWC3 works as peripheral only mode, XHCI HCD will
not be created and added, so we should only get XHCI
HCD in host mode.

Change-Id: Iefb02431d6a973050986963bbabe0a943283f4b3
Signed-off-by: Wu Liang feng <wulf@rock-chips.com>
This commit is contained in:
Wu Liang feng
2016-10-13 14:08:52 +08:00
committed by Huang, Tao
parent 3300229ada
commit 499fcb657a
1 changed files with 3 additions and 1 deletions
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4
drivers/usb/dwc3/dwc3-rockchip.c
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@@ -81,7 +81,7 @@ static void dwc3_rockchip_otg_extcon_evt_work(struct work_struct *work)
container_of(work, struct dwc3_rockchip, otg_work);
struct dwc3 *dwc = rockchip->dwc;
struct extcon_dev *edev = rockchip->edev;
struct usb_hcd *hcd = dev_get_drvdata(&dwc->xhci->dev);
struct usb_hcd *hcd;
unsigned long flags;
int ret;
u32 reg;
@@ -180,6 +180,8 @@ static void dwc3_rockchip_otg_extcon_evt_work(struct work_struct *work)
*/
usleep_range(10000, 11000);
hcd = dev_get_drvdata(&dwc->xhci->dev);
if (hcd->state == HC_STATE_HALT) {
usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
usb_add_hcd(hcd->shared_hcd, hcd->irq, IRQF_SHARED);