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xhci: fix debugfs register accesses while suspended
commit735baf1b23
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:02b6fdc2a1
("usb: xhci: Add debugfs interface for xHCI driver") Cc: stable@vger.kernel.org # 4.15:30332eeefe
: 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>
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@ -133,6 +133,7 @@ static void xhci_debugfs_regset(struct xhci_hcd *xhci, u32 base,
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regset->regs = regs;
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regset->nregs = nregs;
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regset->base = hcd->regs + base;
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regset->dev = hcd->self.controller;
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debugfs_create_regset32((const char *)rgs->name, 0444, parent, regset);
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}
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