linux.git/drivers/dma/dmaengine.c, branch v4.0-rc2

dmaengine: Move dma_get_slave_caps() implementation to dmaengine.c

2015-01-18T14:25:57+00:00

The function is too big to be a static inline.

Signed-off-by: Laurent Pinchart 
Signed-off-by: Vinod Koul

dmaengine: Add a warning for drivers not using the generic slave caps retrieval

2014-12-22T07:04:21+00:00

For the slave caps retrieval to be really useful, most drivers need to
implement it.

Hence, we need to be slightly more aggressive, and trigger a warning at
registration time for drivers that don't fill their caps infos in order to
encourage them to implement it.

Signed-off-by: Maxime Ripard 
Acked-by: Laurent Pinchart 
Signed-off-by: Vinod Koul

dmaengine: Remove the need to declare device_control

2014-12-22T06:58:56+00:00

In order to migrate the drivers without triggering a BUG_ON for the converted
drivers, which would cause bisectability issues, we need to remove that check
before removing the device_control function entirely.

Signed-off-by: Maxime Ripard 
Acked-by: Laurent Pinchart 
Signed-off-by: Vinod Koul

dmaengine: Make channel allocation callbacks optional

2014-12-22T06:58:55+00:00

Nowadays, some drivers don't have anything in there channel allocation
callbacks anymore.

Remove the BUG_ON if those callbacks aren't implemented, in order to allow
drivers to not implement them.

Signed-off-by: Maxime Ripard 
Acked-by: Laurent Pinchart 
Signed-off-by: Vinod Koul

dmaengine: Rework dma_chan_get

2014-12-22T06:58:55+00:00

dma_chan_get uses a rather interesting error handling and code path.

Change it to something more usual in the kernel.

Signed-off-by: Maxime Ripard 
Acked-by: Laurent Pinchart 
Signed-off-by: Vinod Koul

dmaenegine: Delete a check before free_percpu()

2014-12-09T09:26:55+00:00

The free_percpu() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring 
Signed-off-by: Vinod Koul

Merge tag 'dmaengine-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine

2014-10-08T00:39:25+00:00

Pull dmaengine updates from Dan Williams:
 "Even though this has fixes marked for -stable, given the size and the
  needed conflict resolutions this is 3.18-rc1/merge-window material.

  These patches have been languishing in my tree for a long while.  The
  fact that I do not have the time to do proper/prompt maintenance of
  this tree is a primary factor in the decision to step down as
  dmaengine maintainer.  That and the fact that the bulk of drivers/dma/
  activity is going through Vinod these days.

  The net_dma removal has not been in -next.  It has developed simple
  conflicts against mainline and net-next (for-3.18).

  Continuing thanks to Vinod for staying on top of drivers/dma/.

  Summary:

   1/ Step down as dmaengine maintainer see commit 08223d80df38
      "dmaengine maintainer update"

   2/ Removal of net_dma, as it has been marked 'broken' since 3.13
      (commit 77873803363c "net_dma: mark broken"), without reports of
      performance regression.

   3/ Miscellaneous fixes"

* tag 'dmaengine-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine:
  net: make tcp_cleanup_rbuf private
  net_dma: revert 'copied_early'
  net_dma: simple removal
  dmaengine maintainer update
  dmatest: prevent memory leakage on error path in thread
  ioat: Use time_before_jiffies()
  dmaengine: fix xor sources continuation
  dma: mv_xor: Rename __mv_xor_slot_cleanup() to mv_xor_slot_cleanup()
  dma: mv_xor: Remove all callers of mv_xor_slot_cleanup()
  dma: mv_xor: Remove unneeded mv_xor_clean_completed_slots() call
  ioat: Use pci_enable_msix_exact() instead of pci_enable_msix()
  drivers: dma: Include appropriate header file in dca.c
  drivers: dma: Mark functions as static in dma_v3.c
  dma: mv_xor: Add DMA API error checks
  ioat/dca: Use dev_is_pci() to check whether it is pci device

net_dma: simple removal

2014-09-28T14:05:16+00:00

Per commit "77873803363c net_dma: mark broken" net_dma is no longer used
and there is no plan to fix it.

This is the mechanical removal of bits in CONFIG_NET_DMA ifdef guards.
Reverting the remainder of the net_dma induced changes is deferred to
subsequent patches.

Marked for stable due to Roman's report of a memory leak in
dma_pin_iovec_pages():

    https://lkml.org/lkml/2014/9/3/177

Cc: Dave Jiang 
Cc: Vinod Koul 
Cc: David Whipple 
Cc: Alexander Duyck 
Cc: 
Reported-by: Roman Gushchin 
Acked-by: David S. Miller 
Signed-off-by: Dan Williams

dmaengine: fix dmaengine_unmap failure

2014-05-21T21:02:37+00:00

The count which is used to get_unmap_data maybe not the same as the
count computed in dmaengine_unmap which causes to free data in a
wrong pool.

This patch fixes this issue by keeping the map count with unmap_data
structure and use this count to get the pool.

Cc: 
Signed-off-by: Xuelin Shi 
Signed-off-by: Dan Williams

acpi-dma: convert to return error code when asked for channel

2014-02-11T18:00:50+00:00

Currently acpi_dma_request_slave_chan_by_index() and
acpi_dma_request_slave_chan_by_name() return only requested channel or NULL.
This patch converts them to return appropriate error code instead of NULL in
case of unsuccessfull request.

Signed-off-by: Andy Shevchenko 
Acked-by: Mika Westerberg 
Signed-off-by: Vinod Koul