From: Marc Kleine-Budde <mkl@pengutronix.de>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, linux-can@vger.kernel.org,
kernel@pengutronix.de, Anssi Hannula <anssi.hannula@bitwise.fi>,
Michal Simek <michal.simek@xilinx.com>,
stable@vger.kernel.org, Marc Kleine-Budde <mkl@pengutronix.de>
Subject: [PATCH 11/12] can: xilinx_can: fix incorrect clear of non-processed interrupts
Date: Mon, 23 Jul 2018 14:58:42 +0200 [thread overview]
Message-ID: <20180723125843.391-12-mkl@pengutronix.de> (raw)
In-Reply-To: <20180723125843.391-1-mkl@pengutronix.de>
From: Anssi Hannula <anssi.hannula@bitwise.fi>
xcan_interrupt() clears ERROR|RXOFLV|BSOFF|ARBLST interrupts if any of
them is asserted. This does not take into account that some of them
could have been asserted between interrupt status read and interrupt
clear, therefore clearing them without handling them.
Fix the code to only clear those interrupts that it knows are asserted
and therefore going to be processed in xcan_err_interrupt().
Fixes: b1201e44f50b ("can: xilinx CAN controller support")
Signed-off-by: Anssi Hannula <anssi.hannula@bitwise.fi>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
drivers/net/can/xilinx_can.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c
index ea9f9d1a5ba7..cb80a9aa7281 100644
--- a/drivers/net/can/xilinx_can.c
+++ b/drivers/net/can/xilinx_can.c
@@ -938,6 +938,7 @@ static irqreturn_t xcan_interrupt(int irq, void *dev_id)
struct net_device *ndev = (struct net_device *)dev_id;
struct xcan_priv *priv = netdev_priv(ndev);
u32 isr, ier;
+ u32 isr_errors;
/* Get the interrupt status from Xilinx CAN */
isr = priv->read_reg(priv, XCAN_ISR_OFFSET);
@@ -956,11 +957,10 @@ static irqreturn_t xcan_interrupt(int irq, void *dev_id)
xcan_tx_interrupt(ndev, isr);
/* Check for the type of error interrupt and Processing it */
- if (isr & (XCAN_IXR_ERROR_MASK | XCAN_IXR_RXOFLW_MASK |
- XCAN_IXR_BSOFF_MASK | XCAN_IXR_ARBLST_MASK)) {
- priv->write_reg(priv, XCAN_ICR_OFFSET, (XCAN_IXR_ERROR_MASK |
- XCAN_IXR_RXOFLW_MASK | XCAN_IXR_BSOFF_MASK |
- XCAN_IXR_ARBLST_MASK));
+ isr_errors = isr & (XCAN_IXR_ERROR_MASK | XCAN_IXR_RXOFLW_MASK |
+ XCAN_IXR_BSOFF_MASK | XCAN_IXR_ARBLST_MASK);
+ if (isr_errors) {
+ priv->write_reg(priv, XCAN_ICR_OFFSET, isr_errors);
xcan_err_interrupt(ndev, isr);
}
--
2.18.0
next prev parent reply other threads:[~2018-07-23 12:58 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-23 12:58 pull-request: can 2018-07-23 Marc Kleine-Budde
2018-07-23 12:58 ` [PATCH 01/12] can: peak_canfd: fix firmware < v3.3.0: limit allocation to 32-bit DMA addr only Marc Kleine-Budde
2018-07-23 12:58 ` [PATCH 02/12] can: m_can.c: fix setup of CCCR register: clear CCCR NISO bit before checking can.ctrlmode Marc Kleine-Budde
2018-07-23 12:58 ` [PATCH 03/12] can: mpc5xxx_can: check of_iomap return before use Marc Kleine-Budde
2018-07-23 12:58 ` [PATCH 04/12] can: m_can: Fix runtime resume call Marc Kleine-Budde
2018-07-23 12:58 ` [PATCH 05/12] can: m_can: Move accessing of message ram to after clocks are enabled Marc Kleine-Budde
2018-07-23 12:58 ` [PATCH 06/12] can: xilinx_can: fix device dropping off bus on RX overrun Marc Kleine-Budde
2018-07-23 12:58 ` [PATCH 07/12] can: xilinx_can: fix RX loop if RXNEMP is asserted without RXOK Marc Kleine-Budde
2018-07-23 12:58 ` [PATCH 08/12] can: xilinx_can: fix recovery from error states not being propagated Marc Kleine-Budde
2018-07-23 12:58 ` [PATCH 09/12] can: xilinx_can: keep only 1-2 frames in TX FIFO to fix TX accounting Marc Kleine-Budde
2018-07-23 12:58 ` [PATCH 10/12] can: xilinx_can: fix RX overflow interrupt not being enabled Marc Kleine-Budde
2018-07-23 12:58 ` Marc Kleine-Budde [this message]
2018-07-23 12:58 ` [PATCH 12/12] can: xilinx_can: fix power management handling Marc Kleine-Budde
2018-07-23 18:02 ` pull-request: can 2018-07-23 David Miller
2018-07-24 7:27 ` Marc Kleine-Budde
2018-07-25 23:26 ` David Miller
2018-07-26 6:12 ` Marc Kleine-Budde
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