diff options
| author | Peter Chen <peter.chen@nxp.com> | 2017-07-20 14:48:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-20 15:40:36 +0300 |
| commit | 576d55460e7f209139545a348746c2fcadf61bc3 (patch) | |
| tree | 53dbbc025a5e4a8d7a426e9ee763daf520b55d89 | |
| parent | a54408d0a004757789863d74e29c2297edae0b4d (diff) | |
| download | linux-576d55460e7f209139545a348746c2fcadf61bc3.tar.xz | |
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>
| -rw-r--r-- | drivers/usb/host/xhci-hub.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index 9ef5f68e3213..00721e8807ab 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*/ |