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authorPeter Chen <peter.chen@nxp.com>2017-07-20 14:48:30 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-07-20 14:40:36 +0200
commit576d55460e7f209139545a348746c2fcadf61bc3 (patch)
tree53dbbc025a5e4a8d7a426e9ee763daf520b55d89 /drivers/usb
parenta54408d0a004757789863d74e29c2297edae0b4d (diff)
downloadop-kernel-dev-576d55460e7f209139545a348746c2fcadf61bc3.zip
op-kernel-dev-576d55460e7f209139545a348746c2fcadf61bc3.tar.gz
usb: xhci: fix spinlock recursion for USB2 test mode
Both xhci_hub_control and xhci_disable_slot tries to hold spinlock, the spinlock recursion occurs when enters USB2 test mode. Fix it by unlock spinlock before calling xhci_disable_slot. Cc: <stable@vger.kernel.org> Fixes: 0f1d832ed1fb ("usb: xhci: Add port test modes support for usb2") Signed-off-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/host/xhci-hub.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 9ef5f68..00721e8 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -610,12 +610,14 @@ static int xhci_enter_test_mode(struct xhci_hcd *xhci,
/* Disable all Device Slots */
xhci_dbg(xhci, "Disable all slots\n");
+ spin_unlock_irqrestore(&xhci->lock, *flags);
for (i = 1; i <= HCS_MAX_SLOTS(xhci->hcs_params1); i++) {
retval = xhci_disable_slot(xhci, NULL, i);
if (retval)
xhci_err(xhci, "Failed to disable slot %d, %d. Enter test mode anyway\n",
i, retval);
}
+ spin_lock_irqsave(&xhci->lock, *flags);
/* Put all ports to the Disable state by clear PP */
xhci_dbg(xhci, "Disable all port (PP = 0)\n");
/* Power off USB3 ports*/
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