linux-stable.git/drivers/net/can, branch v4.7.7

can: dev: fix deadlock reported after bus-off

2016-10-07T13:21:16+00:00

commit 9abefcb1aaa58b9d5aa40a8bb12c87d02415e4c8 upstream.

A timer was used to restart after the bus-off state, leading to a
relatively large can_restart() executed in an interrupt context,
which in turn sets up pinctrl. When this happens during system boot,
there is a high probability of grabbing the pinctrl_list_mutex,
which is locked already by the probe() of other device, making the
kernel suspect a deadlock condition [1].

To resolve this issue, the restart_timer is replaced by a delayed
work.

[1] https://github.com/victronenergy/venus/issues/24

Signed-off-by: Sergei Miroshnichenko 
Signed-off-by: Marc Kleine-Budde 
Signed-off-by: Greg Kroah-Hartman

net: can: ifi: Configure transmitter delay

2016-09-30T08:12:45+00:00

commit 8d58790b832e13d6006d842037732304af357c3c upstream.

Configure the transmitter delay register at +0x1c to correctly handle
the CAN FD bitrate switch (BRS). This moves the SSP (secondary sample
point) to a proper offset, so that the TDC mechanism works and won't
generate error frames on the CAN link.

Signed-off-by: Marek Vasut 
Cc: Marc Kleine-Budde 
Cc: Mark Rutland 
Cc: Oliver Hartkopp 
Cc: Wolfgang Grandegger 
Signed-off-by: Marc Kleine-Budde 
Signed-off-by: Greg Kroah-Hartman

can: flexcan: fix resume function

2016-09-30T08:12:45+00:00

commit 4de349e786a3a2d51bd02d56f3de151bbc3c3df9 upstream.

On a imx6ul-pico board the following error is seen during system suspend:

dpm_run_callback(): platform_pm_resume+0x0/0x54 returns -110
PM: Device 2090000.flexcan failed to resume: error -110

The reason for this suspend error is because when the CAN interface is not
active the clocks are disabled and then flexcan_chip_enable() will
always fail due to a timeout error.

In order to fix this issue, only call flexcan_chip_enable/disable()
when the CAN interface is active.

Based on a patch from Dong Aisheng in the NXP kernel.

Signed-off-by: Fabio Estevam 
Signed-off-by: Marc Kleine-Budde 
Signed-off-by: Greg Kroah-Hartman

can: kvaser_usb: Add support for more Kvaser Leaf v2 devices

2016-06-23T09:16:41+00:00

This patch adds support for Kvaser Leaf Light HS v2 OEM, Mini PCI
Express 2xHS and USBcan Light 2xHS.

Signed-off-by: Jimmy Assarsson 
Signed-off-by: Marc Kleine-Budde

can: fix oops caused by wrong rtnl dellink usage

2016-06-23T08:58:17+00:00

For 'real' hardware CAN devices the netlink interface is used to set CAN
specific communication parameters. Real CAN hardware can not be created nor
removed with the ip tool ...

This patch adds a private dellink function for the CAN device driver interface
that does just nothing.

It's a follow up to commit 993e6f2fd ("can: fix oops caused by wrong rtnl
newlink usage") but for dellink.

Reported-by: ajneu 
Signed-off-by: Oliver Hartkopp 
Cc: 
Signed-off-by: Marc Kleine-Budde

can: fix handling of unmodifiable configuration options fix

2016-06-23T08:58:16+00:00

With upstream commit bb208f144cf3f59 (can: fix handling of unmodifiable
configuration options) a new can_validate() function was introduced.

When invoking 'ip link set can0 type can' without any configuration data
can_validate() tries to validate the content without taking into account that
there's totally no content. This patch adds a check for missing content.

Reported-by: ajneu 
Signed-off-by: Oliver Hartkopp 
Cc: 
Signed-off-by: Marc Kleine-Budde

can: gs_usb: Add Basic support for the bytewerk.org candleLight interface

2016-06-20T07:32:40+00:00

This patchs adds basic support for the bytewerk.org candleLight interface,
a open hardware (CERN OHL) USB CAN adapter.

Signed-off-by: Hubert Denkmair 
Signed-off-by: Maximilian Schneider 
Signed-off-by: Marc Kleine-Budde

can: at91_can: RX queue could get stuck at high bus load

2016-06-20T07:32:40+00:00

At high bus load it could happen that "at91_poll()" enters with all RX
message boxes filled up. If then at the end the "quota" is exceeded as
well, "rx_next" will not be reset to the first RX mailbox and hence the
interrupts remain disabled.

Signed-off-by: Wolfgang Grandegger 
Tested-by: Amr Bekhit 
Cc: 
Signed-off-by: Marc Kleine-Budde

can: c_can: Update D_CAN TX and RX functions to 32 bit - fix Altera Cyclone access

2016-06-20T07:32:40+00:00

When testing CAN write floods on Altera's CycloneV, the first 2 bytes
are sometimes 0x00, 0x00 or corrupted instead of the values sent. Also
observed bytes 4 & 5 were corrupted in some cases.

The D_CAN Data registers are 32 bits and changing from 16 bit writes to
32 bit writes fixes the problem.

Testing performed on Altera CycloneV (D_CAN).  Requesting tests on other
C_CAN & D_CAN platforms.

Reported-by: Richard Andrysek 
Signed-off-by: Thor Thayer 
Cc: 
Signed-off-by: Marc Kleine-Budde

can: ifi: Add more detailed error reporting

2016-05-09T09:07:28+00:00

The updated specification for the IFI CANFD core contains description
of more detailed error reporting capability of the core. Implement
support for this detailed error reporting.

Signed-off-by: Marek Vasut 
Signed-off-by: Marc Kleine-Budde