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FAILED: patch "[PATCH] can: flexcan: invoke flexcan_chip_freeze() to enter freeze" failed to apply to 4.19-stable tree

PATCH [email protected] 1 participant 1 message Mar 11, 2021

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Stable branch CAN network drivers
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The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From c63820045e2000f05657467a08715c18c9f490d9 Mon Sep 17 00:00:00 2001
From: Joakim Zhang <[email protected]>
Date: Thu, 18 Feb 2021 19:00:37 +0800
Subject: [PATCH] can: flexcan: invoke flexcan_chip_freeze() to enter freeze
mode

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/[email protected] open here
Signed-off-by Joakim Zhang <[email protected]>
Signed-off-by Marc Kleine-Budde <[email protected]>
drivers/net/can/flexcan.c +7 -5
index e66a51dbea0a..134c05757a3b 100644
@@ -1480,10 +1480,13 @@ static int flexcan_chip_start(struct net_device *dev)
 
 	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

@@ -1492,9 +1495,8 @@ static int flexcan_chip_start(struct net_device *dev)
 	 */
 	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
 	 *