Patch "Revert "usb: dwc3: don't reset device side if dwc3 was configured as host-only"" has been added to the 4.19-stable tree

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This is a note to let you know that I've just added the patch titled

    Revert "usb: dwc3: don't reset device side if dwc3 was configured as host-only"

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:
     revert-usb-dwc3-don-t-reset-device-side-if-dwc3-was-configured-as-host-only.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 afe28cd686aeb77e8d9140d50fb1cf06a7ecb731 Mon Sep 17 00:00:00 2001
From: Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>
Date: Fri, 22 Dec 2023 22:11:33 +0000
Subject: Revert "usb: dwc3: don't reset device side if dwc3 was configured as host-only"

From: Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>

commit afe28cd686aeb77e8d9140d50fb1cf06a7ecb731 upstream.

This reverts commit e835c0a4e23c38531dcee5ef77e8d1cf462658c7.

Don't omit soft-reset. During initialization, the driver may need to
perform a soft reset to ensure the phy is ready when the controller
updates the GCTL.PRTCAPDIR or other settings by issuing phy soft-reset.
Many platforms often have access to DCTL register for soft-reset despite
being host-only. If there are actual reported issues from the platforms
that don't expose DCTL registers, then we will need to revisit (perhaps
to teach dwc3 to perform xhci's soft-reset USBCMD.HCRST).

Cc:  <stable@xxxxxxxxxxxxxxx>
Fixes: e835c0a4e23c ("usb: dwc3: don't reset device side if dwc3 was configured as host-only")
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/7668ab11a48f260820825274976eb41fec7f54d1.1703282469.git.Thinh.Nguyen@xxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/dwc3/core.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -242,9 +242,9 @@ static int dwc3_core_soft_reset(struct d
 	/*
 	 * We're resetting only the device side because, if we're in host mode,
 	 * XHCI driver will reset the host block. If dwc3 was configured for
-	 * host-only mode or current role is host, then we can return early.
+	 * host-only mode, then we can return early.
 	 */
-	if (dwc->dr_mode == USB_DR_MODE_HOST || dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST)
+	if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST)
 		return 0;
 
 	reg = dwc3_readl(dwc->regs, DWC3_DCTL);


Patches currently in stable-queue which might be from Thinh.Nguyen@xxxxxxxxxxxx are

queue-4.19/revert-usb-dwc3-don-t-reset-device-side-if-dwc3-was-configured-as-host-only.patch
queue-4.19/revert-usb-dwc3-soft-reset-phy-on-probe-for-host.patch




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