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authorZhengjun Xing <zhengjun.xing@linux.intel.com>2018-02-12 14:24:49 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-02-15 18:36:19 +0100
commitd91676717261578f429d3577dbe9154b26e8abf7 (patch)
treee08955d62788ec863cec0a392534b1fdf46903df /drivers/usb/host/xhci.c
parentfa2dfd0ec22e0069c84dfae162972cbbc7c75488 (diff)
downloadop-kernel-dev-d91676717261578f429d3577dbe9154b26e8abf7.zip
op-kernel-dev-d91676717261578f429d3577dbe9154b26e8abf7.tar.gz
xhci: Fix xhci debugfs devices node disappearance after hibernation
During system resume from hibernation, xhci host is reset, all the nodes in devices folder are removed in xhci_mem_cleanup function. Later nodes in /sys/kernel/debug/usb/xhci/* are created again in function xhci_run, but the nodes already exist, so the nodes still keep the old ones, finally device nodes in xhci debugfs folder /sys/kernel/debug/usb/xhci/*/devices/* are disappeared. This fix removed xhci debugfs nodes before the nodes are re-created, so all the nodes in xhci debugfs can be re-created successfully. Fixes: 02b6fdc2a153 ("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>
Diffstat (limited to 'drivers/usb/host/xhci.c')
-rw-r--r--drivers/usb/host/xhci.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 1eeb339..b01bd64 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1014,6 +1014,7 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
xhci_dbg(xhci, "cleaning up memory\n");
xhci_mem_cleanup(xhci);
+ xhci_debugfs_exit(xhci);
xhci_dbg(xhci, "xhci_stop completed - status = %x\n",
readl(&xhci->op_regs->status));
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