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Commit b1249ab5 authored by Heiner Kallweit's avatar Heiner Kallweit Committed by Greg Kroah-Hartman
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usb: r8a66597: add locking to r8a66597_check_detect_child 



Use mutex usb_bus_idr_lock to protect idr_find.

Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a4b5d606

drivers/usb/host/r8a66597-hcd.c

+2 −0
Original line number Diff line number Diff line
@@ -2099,11 +2099,13 @@ static void r8a66597_check_detect_child(struct r8a66597 *r8a66597, 


	memset(now_map, 0, sizeof(now_map));



	mutex_lock(&usb_bus_idr_lock);

	bus = idr_find(&usb_bus_idr, hcd->self.busnum);

	if (bus && bus->root_hub) {

		collect_usb_address_map(bus->root_hub, now_map);

		update_usb_address_map(r8a66597, bus->root_hub, now_map);

	}

	mutex_unlock(&usb_bus_idr_lock);

}



static int r8a66597_hub_status_data(struct usb_hcd *hcd, char *buf)