Commit 735baf1b authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
Browse files

xhci: fix debugfs register accesses while suspended 



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: 02b6fdc2 ("usb: xhci: Add debugfs interface for xHCI driver")
Cc: stable@vger.kernel.org # 4.15: 30332eee: debugfs: regset32: Add Runtime PM support
Cc: stable@vger.kernel.org # 4.15
Signed-off-by: default avatarJohan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20230405090342.7363-1-johan+linaro@kernel.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 091b813d

drivers/usb/host/xhci-debugfs.c

+1 −0
Original line number Diff line number Diff line
@@ -133,6 +133,7 @@ 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);

}