From 3092933b2637f9877a965312969f8ac3a8fe227b Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 5 Apr 2023 11:03:42 +0200 Subject: [PATCH] xhci: fix debugfs register accesses while suspended 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 Link: https://lore.kernel.org/r/20230405090342.7363-1-johan+linaro@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-debugfs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/host/xhci-debugfs.c b/drivers/usb/host/xhci-debugfs.c index f5c8e4eb62ae..dc332f5800ad 100644 --- a/drivers/usb/host/xhci-debugfs.c +++ b/drivers/usb/host/xhci-debugfs.c @@ -132,6 +132,7 @@ static void xhci_debugfs_regset(struct xhci_hcd *xhci, u32 base, 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); }