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From: Marc Kleine-Budde <mkl@pengutronix.de>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, kuba@kernel.org, linux-can@vger.kernel.org,
	kernel@pengutronix.de,
	Markus Schneider-Pargmann <msp@baylibre.com>,
	Marc Kleine-Budde <mkl@pengutronix.de>
Subject: [PATCH net-next 36/39] can: tcan4x5x: Remove invalid write in clear_interrupts
Date: Mon, 12 Dec 2022 12:30:42 +0100	[thread overview]
Message-ID: <20221212113045.222493-37-mkl@pengutronix.de> (raw)
In-Reply-To: <20221212113045.222493-1-mkl@pengutronix.de>

From: Markus Schneider-Pargmann <msp@baylibre.com>

Register 0x824 TCAN4X5X_MCAN_INT_REG is a read-only register. Any writes
to this register do not have any effect.

Remove this write. The m_can driver aldready clears the interrupts in
m_can_isr() by writing to M_CAN_IR which is translated to register
0x1050 which is a writable version of this register.

Fixes: 5443c226ba91 ("can: tcan4x5x: Add tcan4x5x driver to the kernel")
Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Link: https://lore.kernel.org/all/20221206115728.1056014-9-msp@baylibre.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/m_can/tcan4x5x-core.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/tcan4x5x-core.c
index a3aeb83de152..a77f4d4f6299 100644
--- a/drivers/net/can/m_can/tcan4x5x-core.c
+++ b/drivers/net/can/m_can/tcan4x5x-core.c
@@ -204,11 +204,6 @@ static int tcan4x5x_clear_interrupts(struct m_can_classdev *cdev)
 	if (ret)
 		return ret;
 
-	ret = tcan4x5x_write_tcan_reg(cdev, TCAN4X5X_MCAN_INT_REG,
-				      TCAN4X5X_ENABLE_MCAN_INT);
-	if (ret)
-		return ret;
-
 	ret = tcan4x5x_write_tcan_reg(cdev, TCAN4X5X_INT_FLAGS,
 				      TCAN4X5X_CLEAR_ALL_INT);
 	if (ret)
-- 
2.35.1



  parent reply	other threads:[~2022-12-12 11:32 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-12 11:30 [PATCH net-next 0/39] pull-request: can-next 2022-12-12 Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 01/39] can: kvaser_usb: kvaser_usb_set_bittiming(): fix redundant initialization warning for err Marc Kleine-Budde
2022-12-12 12:20   ` patchwork-bot+netdevbpf
2022-12-12 11:30 ` [PATCH net-next 02/39] can: kvaser_usb: kvaser_usb_set_{,data}bittiming(): remove empty lines in variable declaration Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 03/39] can: rcar_canfd: rcar_canfd_probe: Add struct rcar_canfd_hw_info to driver data Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 04/39] can: m_can: sort header inclusion alphabetically Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 05/39] can: rcar_canfd: Add max_channels to struct rcar_canfd_hw_info Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 06/39] can: rcar_canfd: Add shared_global_irqs " Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 07/39] can: rcar_canfd: Add postdiv " Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 08/39] can: rcar_canfd: Add multi_channel_irqs " Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 09/39] can: ctucanfd: Drop obsolete dependency on COMPILE_TEST Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 10/39] can: etas_es58x: sort the includes by alphabetic order Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 11/39] can: flexcan: add auto stop mode for IMX93 to support wakeup Marc Kleine-Budde
2022-12-13  2:22   ` Bough Chen
2022-12-13  8:11     ` Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 12/39] can: etas_es58x: add devlink support Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 13/39] dt-bindings: can: fsl,flexcan: add imx93 compatible Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 14/39] can: etas_es58x: add devlink port support Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 15/39] dt-bindings: can: renesas,rcar-canfd: Document RZ/Five SoC Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 16/39] USB: core: export usb_cache_string() Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 17/39] can: c_can: use devm_platform_get_and_ioremap_resource() Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 18/39] net: devlink: add DEVLINK_INFO_VERSION_GENERIC_FW_BOOTLOADER Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 19/39] can: etas_es58x: export product information through devlink_ops::info_get() Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 20/39] can: etas_es58x: remove es58x_get_product_info() Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 21/39] Documentation: devlink: add devlink documentation for the etas_es58x driver Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 22/39] can: ucan: use strscpy() to instead of strncpy() Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 23/39] net: af_can: remove useless parameter 'err' in 'can_rx_register()' Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 24/39] can: ucan: remove unused ucan_priv::intf Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 25/39] can: gs_usb: remove gs_can::iface Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 26/39] can: m_can: Call the RAM init directly from m_can_chip_config Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 27/39] can: raw: add support for SO_MARK Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 28/39] dt-bindings: can: renesas,rcar-canfd: Fix number of channels for R-Car V3U Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 29/39] can: m_can: Eliminate double read of TXFQS in tx_handler Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 30/39] can: m_can: Avoid reading irqstatus twice Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 31/39] can: m_can: Read register PSR only on error Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 32/39] can: m_can: Count TXE FIFO getidx in the driver Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 33/39] can: m_can: Count read getindex " Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 34/39] can: m_can: Batch acknowledge transmit events Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 35/39] can: m_can: Batch acknowledge rx fifo Marc Kleine-Budde
2022-12-12 11:30 ` Marc Kleine-Budde [this message]
2022-12-12 11:30 ` [PATCH net-next 37/39] can: tcan4x5x: Fix use of register error status mask Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 38/39] can: tcan4x5x: Fix register range of first two blocks Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 39/39] can: tcan4x5x: Specify separate read/write ranges Marc Kleine-Budde

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