From ad2302345d59d29232cb668baaae9e840925d153 Mon Sep 17 00:00:00 2001
From: "ZHU Yi (ST-FIR/ENG1-Zhu)" <Yi.Zhu5@cn.bosch.com>
Date: Fri, 15 Sep 2017 06:59:15 +0000
Subject: [PATCH] can: flexcan: fix state transition regression
Git-commit: ad2302345d59d29232cb668baaae9e840925d153
Patch-mainline: v4.14-rc6
References: bsc#1051510
Update state upon any interrupt to report correct state transitions in
case the flexcan core enabled the broken error state quirk fix.
Signed-off-by: Zhu Yi <yi.zhu5@cn.bosch.com>
Signed-off-by: Mark Jonas <mark.jonas@de.bosch.com>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Cc: linux-stable <stable@vger.kernel.org> # >= v4.11
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/can/flexcan.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -765,8 +765,9 @@ static irqreturn_t flexcan_irq(int irq,
flexcan_write(reg_esr & FLEXCAN_ESR_ALL_INT, ®s->esr);
}
- /* state change interrupt */
- if (reg_esr & FLEXCAN_ESR_ERR_STATE)
+ /* state change interrupt or broken error state quirk fix is enabled */
+ if ((reg_esr & FLEXCAN_ESR_ERR_STATE) ||
+ (priv->devtype_data->quirks & FLEXCAN_QUIRK_BROKEN_ERR_STATE))
flexcan_irq_state(dev, reg_esr);
/* bus error IRQ - handle if bus error reporting is activated */