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Commit 3092933b authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
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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: 02b6fdc2 ("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: 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 3c5a2865

drivers/usb/host/xhci-debugfs.c

+1 −0
Original line number Diff line number Diff line
@@ -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);

}