This is a note to let you know that I've just added the patch titled
USB: musb: fix session-bit runtime-PM quirk
to the 4.13-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:
usb-musb-fix-session-bit-runtime-pm-quirk.patch
and it can be found in the queue-4.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4f190e0b9de89c4c917c3ffb3799e9d00fc534ac Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Mon, 9 Oct 2017 22:46:07 -0500
Subject: USB: musb: fix session-bit runtime-PM quirk
From: Johan Hovold <johan@xxxxxxxxxx>
commit 4f190e0b9de89c4c917c3ffb3799e9d00fc534ac upstream.
The current session-bit quirk implementation does not prevent the retry
counter from underflowing, something which could break runtime PM and
keep the device active for a very long time (about 2^32 seconds) after a
disconnect.
This notably breaks the B-device timeout case, but could potentially
cause problems also when the controller is operating as an A-device.
Fixes: 2bff3916fda9 ("usb: musb: Fix PM for hub disconnect")
Cc: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Tested-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Bin Liu <b-liu@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/musb/musb_core.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1861,22 +1861,22 @@ static void musb_pm_runtime_check_sessio
MUSB_DEVCTL_HR;
switch (devctl & ~s) {
case MUSB_QUIRK_B_INVALID_VBUS_91:
- if (musb->quirk_retries--) {
+ if (musb->quirk_retries) {
musb_dbg(musb,
"Poll devctl on invalid vbus, assume no session");
schedule_delayed_work(&musb->irq_work,
msecs_to_jiffies(1000));
-
+ musb->quirk_retries--;
return;
}
/* fall through */
case MUSB_QUIRK_A_DISCONNECT_19:
- if (musb->quirk_retries--) {
+ if (musb->quirk_retries) {
musb_dbg(musb,
"Poll devctl on possible host mode disconnect");
schedule_delayed_work(&musb->irq_work,
msecs_to_jiffies(1000));
-
+ musb->quirk_retries--;
return;
}
if (!musb->session)
Patches currently in stable-queue which might be from johan@xxxxxxxxxx are
queue-4.13/usb-musb-fix-late-external-abort-on-suspend.patch
queue-4.13/usb-musb-fix-session-bit-runtime-pm-quirk.patch
queue-4.13/usb-serial-metro-usb-add-ms7820-device-id.patch