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can: kvaser_pciefd: Always disable bus load reporting

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[ Upstream commit 7c6e6bce08f918b64459415f58061d4d6df44994 ]

Under certain circumstances, when switching from Kvaser's linuxcan driver
(kvpciefd) to the SocketCAN driver (kvaser_pciefd), the bus load reporting
is not disabled.
This is flooding the kernel log with prints like:
[3485.574677] kvaser_pciefd 0000:02:00.0: Received unexpected packet type 0x00000009

Always put the controller in the expected state, instead of assuming that
bus load reporting is inactive.

Note: If bus load reporting is enabled when the driver is loaded, you will
      still get a number of bus load packages (and printouts), before it is
      disabled.

Fixes: 26ad340e582d ("can: kvaser_pciefd: Add driver for Kvaser PCIEcan devices")
Link: https://lore.kernel.org/r/20210309091724.31262-1-jimmyassarsson@gmail.com
Signed-off-by: Jimmy Assarsson <extja@kvaser.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jimmy Assarsson 2021-03-09 10:17:23 +01:00 committed by Greg Kroah-Hartman
parent af3e6c3dcf
commit f9a5974b97
1 changed files with 4 additions and 0 deletions
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4
drivers/net/can/kvaser_pciefd.c
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@ -57,6 +57,7 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices");
#define KVASER_PCIEFD_KCAN_STAT_REG 0x418
#define KVASER_PCIEFD_KCAN_MODE_REG 0x41c
#define KVASER_PCIEFD_KCAN_BTRN_REG 0x420
#define KVASER_PCIEFD_KCAN_BUS_LOAD_REG 0x424
#define KVASER_PCIEFD_KCAN_BTRD_REG 0x428
#define KVASER_PCIEFD_KCAN_PWM_REG 0x430
/* Loopback control register */
@ -949,6 +950,9 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie)
timer_setup(&can->bec_poll_timer, kvaser_pciefd_bec_poll_timer,
0);
/* Disable Bus load reporting */
iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_BUS_LOAD_REG);
tx_npackets = ioread32(can->reg_base +
KVASER_PCIEFD_KCAN_TX_NPACKETS_REG);
if (((tx_npackets >> KVASER_PCIEFD_KCAN_TX_NPACKETS_MAX_SHIFT) &