linux.git/drivers/net/can/flexcan.c, branch v3.19

Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2014-12-15T00:10:09+00:00

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev__once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...

can: flexcan: Consolidate and unify state change handling

2014-12-07T20:22:10+00:00

Replacing error state change handling with the new mechanism.

Signed-off-by: Andri Yngvason 
Acked-by: Wolfgang Grandegger 
Signed-off-by: Marc Kleine-Budde

net: can: drop owner assignment from platform_drivers

2014-10-20T14:20:59+00:00

A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2014-09-23T16:09:27+00:00

Conflicts:
	arch/mips/net/bpf_jit.c
	drivers/net/can/flexcan.c

Both the flexcan and MIPS bpf_jit conflicts were cases of simple
overlapping changes.

Signed-off-by: David S. Miller

can: flexcan: increase FLEXCAN_MCR_MAXMB() macro to 7 bits

2014-09-18T09:15:36+00:00

This patch increases the mask in the FLEXCAN_MCR_MAXMB() to 7 bits as in the
newer flexcan cores the MAXMB field is 7 bits wide.

Reported-by: David Jander 
Signed-off-by: Marc Kleine-Budde

can: flexcan: put TX mailbox into TX_INACTIVE mode after tx-complete

2014-09-18T09:15:27+00:00

After sending a RTR frame the TX mailbox becomes a RX_EMPTY mailbox. To avoid
side effects when the RX-FIFO is full, this patch puts the TX mailbox into
TX_INACTIVE mode in the transmission complete interrupt handler. This, of
course, leaves a race window between the actual completion of the transmission
and the handling of tx-complete interrupt. However this is the best we can do
without busy polling the tx complete interrupt.

Cc: linux-stable 
Signed-off-by: Marc Kleine-Budde

can: flexcan: implement workaround for errata ERR005829

2014-09-18T09:15:20+00:00

This patch implements the workaround mentioned in ERR005829:

    ERR005829: FlexCAN: FlexCAN does not transmit a message that is enabled to
    be transmitted in a specific moment during the arbitration process.

Workaround: The workaround consists of two extra steps after setting up a
message for transmission:

Step 8: Reserve the first valid mailbox as an inactive mailbox (CODE=0b1000).
If RX FIFO is disabled, this mailbox must be message buffer 0. Otherwise, the
first valid mailbox can be found using the "RX FIFO filters" table in the
FlexCAN chapter of the chip reference manual.

Step 9: Write twice INACTIVE code (0b1000) into the first valid mailbox.

Signed-off-by: David Jander 
Cc: linux-stable 
Signed-off-by: Marc Kleine-Budde

can: flexcan: correctly initialize mailboxes

2014-09-18T09:15:15+00:00

Apparently mailboxes may contain random data at startup, causing some of them
being prepared for message reception. This causes overruns being missed or even
confusing the IRQ check for trasmitted messages, increasing the transmit
counter instead of the error counter.

This patch initializes all mailboxes after the FIFO as RX_INACTIVE.

Signed-off-by: David Jander 
Cc: linux-stable 
Signed-off-by: Marc Kleine-Budde

can: flexcan: mark TX mailbox as TX_INACTIVE

2014-09-18T09:15:09+00:00

This patch fixes the initialization of the TX mailbox. It is now correctly
initialized as TX_INACTIVE not RX_EMPTY.

Cc: linux-stable 
Signed-off-by: Marc Kleine-Budde

can: flexcan: avoid calling usleep_range from interrupt context

2014-09-11T07:29:51+00:00

Apparently can_restart() runs from a (timer-) interrupt and can call
flexcan_chip_[en|dis]able(), so avoid using usleep_range()

Signed-off-by: David Jander 
Cc: linux-stable 
Signed-off-by: Marc Kleine-Budde