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xhci: fix xhci debugfs errors in xhci_stop

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In function xhci_stop, xhci_debugfs_exit called before xhci_mem_cleanup.
xhci_debugfs_exit removed the xhci debugfs root nodes, xhci_mem_cleanup
called function xhci_free_virt_devices_depth_first which in turn called
function xhci_debugfs_remove_slot.
Function xhci_debugfs_remove_slot removed the nodes for devices, the nodes
folders are sub folder of xhci debugfs.

It is unreasonable to remove xhci debugfs root folder before
xhci debugfs sub folder. Function xhci_mem_cleanup should be called
before function xhci_debugfs_exit.

Fixes: 02b6fdc2a1 ("usb: xhci: Add debugfs interface for xHCI driver")
Cc: <stable@vger.kernel.org> # v4.15
Signed-off-by: Zhengjun Xing <zhengjun.xing@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zhengjun Xing 2018-02-12 14:24:51 +02:00 committed by Greg Kroah-Hartman
parent 8c5a93ebf7
commit 11cd764dc9
1 changed files with 1 additions and 2 deletions
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3
drivers/usb/host/xhci.c
View file

@ -646,8 +646,6 @@ static void xhci_stop(struct usb_hcd *hcd)
return;
}
xhci_debugfs_exit(xhci);
xhci_dbc_exit(xhci);
spin_lock_irq(&xhci->lock);
@ -680,6 +678,7 @@ static void xhci_stop(struct usb_hcd *hcd)
xhci_dbg_trace(xhci, trace_xhci_dbg_init, "cleaning up memory");
xhci_mem_cleanup(xhci);
xhci_debugfs_exit(xhci);
xhci_dbg_trace(xhci, trace_xhci_dbg_init,
"xhci_stop completed - status = %x",
readl(&xhci->op_regs->status));