| From 735baf1b23458f71a8b15cb924af22c9ff9cd125 Mon Sep 17 00:00:00 2001 |
| From: Johan Hovold <johan+linaro@kernel.org> |
| Date: Wed, 5 Apr 2023 11:03:42 +0200 |
| Subject: xhci: fix debugfs register accesses while suspended |
| |
| From: Johan Hovold <johan+linaro@kernel.org> |
| |
| 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 <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> |
| --- |
| drivers/usb/host/xhci-debugfs.c | 1 + |
| 1 file changed, 1 insertion(+) |
| |
| --- a/drivers/usb/host/xhci-debugfs.c |
| +++ b/drivers/usb/host/xhci-debugfs.c |
| @@ -132,6 +132,7 @@ static void xhci_debugfs_regset(struct x |
| 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); |
| } |
