From: Marc Kleine-Budde <mkl@pengutronix.de>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, linux-can@vger.kernel.org,
kernel@pengutronix.de, Pankaj Bansal <pankaj.bansal@nxp.com>,
linux-stable <stable@vger.kernel.org>,
Marc Kleine-Budde <mkl@pengutronix.de>
Subject: [PATCH 10/20] can: flexcan: Unlock the MB unconditionally
Date: Mon, 12 Nov 2018 12:57:18 +0100 [thread overview]
Message-ID: <20181112115728.18331-11-mkl@pengutronix.de> (raw)
In-Reply-To: <20181112115728.18331-1-mkl@pengutronix.de>
From: Pankaj Bansal <pankaj.bansal@nxp.com>
Unlock the MB irrespective of reception method being FIFO or timestamp
based. It is optional but recommended to unlock Mailbox as soon as
possible and make it available for reception.
Reported-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Pankaj Bansal <pankaj.bansal@nxp.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
drivers/net/can/flexcan.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index 8e972ef08637..0431f8d05518 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -720,9 +720,14 @@ static unsigned int flexcan_mailbox_read(struct can_rx_offload *offload,
priv->write(BIT(n - 32), ®s->iflag2);
} else {
priv->write(FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, ®s->iflag1);
- priv->read(®s->timer);
}
+ /* Read the Free Running Timer. It is optional but recommended
+ * to unlock Mailbox as soon as possible and make it available
+ * for reception.
+ */
+ priv->read(®s->timer);
+
return 1;
}
--
2.19.1
next prev parent reply other threads:[~2018-11-12 11:57 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-12 11:57 pull-request: can 2018-11-09 Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 01/20] can: raw: check for CAN FD capable netdev in raw_sendmsg() Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 02/20] can: kvaser_usb: Fix potential uninitialized variable use Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 03/20] can: kvaser_usb: Fix accessing freed memory in kvaser_usb_start_xmit() Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 04/20] can: ucan: remove set but not used variable 'udev' Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 05/20] can: ucan: remove duplicated include from ucan.c Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 06/20] dt-bindings: can: rcar_can: document r8a77965 support Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 07/20] can: rcar_can: Fix erroneous registration Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 08/20] dt-bindings: can: rcar_can: Add r8a774a1 support Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 09/20] can: hi311x: Use level-triggered interrupt Marc Kleine-Budde
2018-11-12 11:57 ` Marc Kleine-Budde [this message]
2018-11-12 11:57 ` [PATCH 11/20] can: flexcan: Always use last mailbox for TX Marc Kleine-Budde
2019-01-11 10:56 ` Uwe Kleine-König
2019-01-11 10:58 ` [PATCH v4.19.x] can: flexcan: fix out-of-bounds array access Uwe Kleine-König
2019-01-11 11:20 ` [PATCH] can: flexcan: fix NULL pointer exception during bringup Uwe Kleine-König
2019-01-22 10:38 ` Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 12/20] can: flexcan: remove not needed struct flexcan_priv::tx_mb and struct flexcan_priv::tx_mb_idx Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 13/20] can: dev: can_get_echo_skb(): factor out non sending code to __can_get_echo_skb() Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 14/20] can: dev: __can_get_echo_skb(): replace struct can_frame by canfd_frame to access frame length Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 15/20] can: dev: __can_get_echo_skb(): Don't crash the kernel if can_priv::echo_skb is accessed out of bounds Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 16/20] can: dev: __can_get_echo_skb(): print error message, if trying to echo non existing skb Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 17/20] can: rx-offload: introduce can_rx_offload_get_echo_skb() and can_rx_offload_queue_sorted() functions Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 18/20] can: flexcan: handle tx-complete CAN frames via rx-offload infrastructure Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 19/20] can: rx-offload: rename can_rx_offload_irq_queue_err_skb() to can_rx_offload_queue_tail() Marc Kleine-Budde
2018-11-12 11:57 ` [PATCH 20/20] can: flexcan: use can_rx_offload_queue_sorted() for flexcan_irq_bus_*() Marc Kleine-Budde
2018-11-13 16:43 ` pull-request: can 2018-11-09 David Miller
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