* [PATCH] xhci: fix debugfs register accesses while suspended
@ 2023-04-05 9:03 Johan Hovold
0 siblings, 0 replies; only message in thread
From: Johan Hovold @ 2023-04-05 9:03 UTC (permalink / raw)
To: Mathias Nyman
Cc: Greg Kroah-Hartman, Lu Baolu, Alan Stern, Oliver Neukum,
Thinh Nguyen, Udipto Goswami, linux-usb, linux-kernel,
Johan Hovold, stable
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>
---
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 0bc7fe11f749..99baa60ef50f 100644
--- a/drivers/usb/host/xhci-debugfs.c
+++ b/drivers/usb/host/xhci-debugfs.c
@@ -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);
}
--
2.39.2
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