Patch "can: flexcan: invoke flexcan_chip_freeze() to enter freeze mode" has been added to the 5.10-stable tree

[<gregkh@xxxxxxxxxxxxxxxxxxx>]

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

    can: flexcan: invoke flexcan_chip_freeze() to enter freeze mode

to the 5.10-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:
     can-flexcan-invoke-flexcan_chip_freeze-to-enter-freeze-mode.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From c63820045e2000f05657467a08715c18c9f490d9 Mon Sep 17 00:00:00 2001
From: Joakim Zhang <qiangqing.zhang@xxxxxxx>
Date: Thu, 18 Feb 2021 19:00:37 +0800
Subject: can: flexcan: invoke flexcan_chip_freeze() to enter freeze mode

From: Joakim Zhang <qiangqing.zhang@xxxxxxx>

commit c63820045e2000f05657467a08715c18c9f490d9 upstream.

Invoke flexcan_chip_freeze() to enter freeze mode, since need poll
freeze mode acknowledge.

Fixes: e955cead03117 ("CAN: Add Flexcan CAN controller driver")
Link: https://lore.kernel.org/r/20210218110037.16591-4-qiangqing.zhang@xxxxxxx
Signed-off-by: Joakim Zhang <qiangqing.zhang@xxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/can/flexcan.c |   12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -1375,10 +1375,13 @@ static int flexcan_chip_start(struct net
 
 	flexcan_set_bittiming(dev);
 
+	/* set freeze, halt */
+	err = flexcan_chip_freeze(priv);
+	if (err)
+		goto out_chip_disable;
+
 	/* MCR
 	 *
-	 * enable freeze
-	 * halt now
 	 * only supervisor access
 	 * enable warning int
 	 * enable individual RX masking
@@ -1387,9 +1390,8 @@ static int flexcan_chip_start(struct net
 	 */
 	reg_mcr = priv->read(&regs->mcr);
 	reg_mcr &= ~FLEXCAN_MCR_MAXMB(0xff);
-	reg_mcr |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_HALT | FLEXCAN_MCR_SUPV |
-		FLEXCAN_MCR_WRN_EN | FLEXCAN_MCR_IRMQ | FLEXCAN_MCR_IDAM_C |
-		FLEXCAN_MCR_MAXMB(priv->tx_mb_idx);
+	reg_mcr |= FLEXCAN_MCR_SUPV | FLEXCAN_MCR_WRN_EN | FLEXCAN_MCR_IRMQ |
+		FLEXCAN_MCR_IDAM_C | FLEXCAN_MCR_MAXMB(priv->tx_mb_idx);
 
 	/* MCR
 	 *


Patches currently in stable-queue which might be from qiangqing.zhang@xxxxxxx are

queue-5.10/can-flexcan-enable-rx-fifo-after-frz-halt-valid.patch
queue-5.10/can-flexcan-assert-frz-bit-in-flexcan_chip_freeze.patch
queue-5.10/can-flexcan-invoke-flexcan_chip_freeze-to-enter-freeze-mode.patch