This is a note to let you know that I've just added the patch titled
xhci: fix debugfs register accesses while suspended
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xhci-fix-debugfs-register-accesses-while-suspended.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 735baf1b23458f71a8b15cb924af22c9ff9cd125 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
Date: Wed, 5 Apr 2023 11:03:42 +0200
Subject: xhci: fix debugfs register accesses while suspended
From: Johan Hovold <johan+linaro@xxxxxxxxxx>
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@xxxxxxxxxxxxxxx # 4.15: 30332eeefec8: debugfs: regset32: Add Runtime PM support
Cc: stable@xxxxxxxxxxxxxxx # 4.15
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230405090342.7363-1-johan+linaro@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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);
}
Patches currently in stable-queue which might be from johan+linaro@xxxxxxxxxx are
queue-4.19/xhci-fix-debugfs-register-accesses-while-suspended.patch
queue-4.19/usb-dwc3-fix-runtime-pm-imbalance-on-unbind.patch
