From: Johan Hovold johan+linaro@kernel.org
commit 735baf1b23458f71a8b15cb924af22c9ff9cd125 upstream.
Wire up the debugfs regset device pointer so that the controller is resumed before accessing registers to avoid crashing or locking up if it happens to be runtime suspended.
Fixes: 02b6fdc2a153 ("usb: xhci: Add debugfs interface for xHCI driver") Cc: stable@vger.kernel.org # 4.15: 30332eeefec8: debugfs: regset32: Add Runtime PM support Cc: stable@vger.kernel.org # 4.15 Signed-off-by: Johan Hovold johan+linaro@kernel.org Link: https://lore.kernel.org/r/20230405090342.7363-1-johan+linaro@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/host/xhci-debugfs.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/usb/host/xhci-debugfs.c +++ b/drivers/usb/host/xhci-debugfs.c @@ -132,6 +132,7 @@ static void xhci_debugfs_regset(struct x regset->regs = regs; regset->nregs = nregs; regset->base = hcd->regs + base; + regset->dev = hcd->self.controller;
debugfs_create_regset32((const char *)rgs->name, 0444, parent, regset); }