This is a note to let you know that I've just added the patch titled can: flexcan: fix state transition regression 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: can-flexcan-fix-state-transition-regression.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 ad2302345d59d29232cb668baaae9e840925d153 Mon Sep 17 00:00:00 2001 From: "ZHU Yi (ST-FIR/ENG1-Zhu)" <Yi.Zhu5@xxxxxxxxxxxx> Date: Fri, 15 Sep 2017 06:59:15 +0000 Subject: can: flexcan: fix state transition regression From: ZHU Yi (ST-FIR/ENG1-Zhu) <Yi.Zhu5@xxxxxxxxxxxx> commit ad2302345d59d29232cb668baaae9e840925d153 upstream. 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@xxxxxxxxxxxx> Signed-off-by: Mark Jonas <mark.jonas@xxxxxxxxxxxx> Acked-by: Wolfgang Grandegger <wg@xxxxxxxxxxxxxx> Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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 */ Patches currently in stable-queue which might be from Yi.Zhu5@xxxxxxxxxxxx are queue-4.13/can-flexcan-rename-legacy-error-state-quirk.patch queue-4.13/can-flexcan-implement-error-passive-state-quirk.patch queue-4.13/can-flexcan-fix-i.mx28-state-transition-issue.patch queue-4.13/can-flexcan-fix-state-transition-regression.patch queue-4.13/can-flexcan-fix-i.mx6-state-transition-issue.patch queue-4.13/can-flexcan-fix-p1010-state-transition-issue.patch