linux.git/drivers/dma, branch v5.8-rc2

dmaengine: tegra-apb: Replace zero-length array with flexible-array

2020-06-16T04:08:32+00:00

There is a regular need in the kernel to provide a way to declare having a
dynamically sized set of trailing elements in a structure. Kernel code should
always use “flexible array members”[1] for these cases. The older style of
one-element or zero-length arrays should no longer be used[2].

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://github.com/KSPP/linux/issues/21

Signed-off-by: Gustavo A. R. Silva

dmaengine: Replace zero-length array with flexible-array

2020-06-16T04:08:30+00:00

There is a regular need in the kernel to provide a way to declare having a
dynamically sized set of trailing elements in a structure. Kernel code should
always use “flexible array members”[1] for these cases. The older style of
one-element or zero-length arrays should no longer be used[2].

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://github.com/KSPP/linux/issues/21

Signed-off-by: Gustavo A. R. Silva

treewide: replace '---help---' in Kconfig files with 'help'

2020-06-13T16:57:21+00:00

Since commit 84af7a6194e4 ("checkpatch: kconfig: prefer 'help' over
'---help---'"), the number of '---help---' has been gradually
decreasing, but there are still more than 2400 instances.

This commit finishes the conversion. While I touched the lines,
I also fixed the indentation.

There are a variety of indentation styles found.

  a) 4 spaces + '---help---'
  b) 7 spaces + '---help---'
  c) 8 spaces + '---help---'
  d) 1 space + 1 tab + '---help---'
  e) 1 tab + '---help---'    (correct indentation)
  f) 1 tab + 1 space + '---help---'
  g) 1 tab + 2 spaces + '---help---'

In order to convert all of them to 1 tab + 'help', I ran the
following commend:

  $ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/'

Signed-off-by: Masahiro Yamada

Merge tag 'dmaengine-5.8-rc1' of git://git.infradead.org/users/vkoul/slave-dma

2020-06-10T18:03:04+00:00

Pull dmaengine updates from Vinod Koul:
 "A fairly small dmaengine update which includes mostly driver updates
  (dmatest, dw-edma, ioat, mmp-tdma and k3-udma) along with Renesas
  binding update to json-schema"

* tag 'dmaengine-5.8-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (39 commits)
  dmaengine: imx-sdma: initialize all script addresses
  dmaengine: ti: k3-udma: Use proper return code in alloc_chan_resources
  dmaengine: ti: k3-udma: Remove udma_chan.in_ring_cnt
  dmaengine: ti: k3-udma: Add missing dma_sync call for rx flush descriptor
  dmaengine: at_xdmac: Replace zero-length array with flexible-array
  dmaengine: at_hdmac: Replace zero-length array with flexible-array
  dmaengine: qcom: bam_dma: Replace zero-length array with flexible-array
  dmaengine: ti: k3-udma: Use PTR_ERR_OR_ZERO() to simplify code
  dmaengine: moxart-dma: Drop pointless static qualifier in moxart_probe()
  dmaengine: sf-pdma: Simplify the error handling path in 'sf_pdma_probe()'
  dmaengine: qcom_hidma: use true,false for bool variable
  dmaengine: dw-edma: support local dma device transfer semantics
  dmaengine: Fix doc strings to satisfy validation script
  dmaengine: Include dmaengine.h into dmaengine.c
  dmaengine: dmatest: Describe members of struct dmatest_info
  dmaengine: dmatest: Describe members of struct dmatest_params
  dmaengine: dmatest: Allow negative timeout value to specify infinite wait
  Revert "dmaengine: dmatest: timeout value of -1 should specify infinite wait"
  dmaengine: stm32-dma: direct mode support through device tree
  dt-bindings: dma: add direct mode support through device tree in stm32-dma
  ...

dmaengine: tegra210-adma: Fix an error handling path in 'tegra_adma_probe()'

2020-05-19T16:56:01+00:00

Commit b53611fb1ce9 ("dmaengine: tegra210-adma: Fix crash during probe")
has moved some code in the probe function and reordered the error handling
path accordingly.
However, a goto has been missed.

Fix it and goto the right label if 'dma_async_device_register()' fails, so
that all resources are released.

Fixes: b53611fb1ce9 ("dmaengine: tegra210-adma: Fix crash during probe")
Signed-off-by: Christophe JAILLET 
Reviewed-by: Jon Hunter 
Acked-by: Thierry Reding 
Link: https://lore.kernel.org/r/20200516214205.276266-1-christophe.jaillet@wanadoo.fr
Signed-off-by: Vinod Koul

dmaengine: imx-sdma: initialize all script addresses

2020-05-15T07:01:06+00:00

The script addresses array increases with each new version. The driver
initializes the array to -EINVAL initially, but only up to the size
of the v1 array. Initialize the additional addresses for the newer
versions as well. Without this uninitialized values of the newer arrays
are treated as valid.

Signed-off-by: Sascha Hauer 
Reviewed-by: Robin Gong 
Link: https://lore.kernel.org/r/20200513060405.18685-1-s.hauer@pengutronix.de
Signed-off-by: Vinod Koul

dmaengine: ti: k3-udma: Use proper return code in alloc_chan_resources

2020-05-15T05:52:41+00:00

In udma_alloc_chan_resources() if the channel is not willing to stop then
the function should return with error code.

Signed-off-by: Peter Ujfalusi 
Link: https://lore.kernel.org/r/20200512134519.5642-1-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul

dmaengine: ti: k3-udma: Remove udma_chan.in_ring_cnt

2020-05-15T05:52:41+00:00

The in_ring_cnt is not used for anything, it can be removed.

Signed-off-by: Peter Ujfalusi 
Link: https://lore.kernel.org/r/20200512134611.6015-1-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul

dmaengine: ti: k3-udma: Add missing dma_sync call for rx flush descriptor

2020-05-15T05:52:41+00:00

The TR mode rx flush descriptor did not had a dma_sync_single_for_device()
call to make sure that the DMA see the correct information.

Signed-off-by: Peter Ujfalusi 
Link: https://lore.kernel.org/r/20200512134544.5839-1-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul

dmaengine: ti: k3-udma: Fix TR mode flags for slave_sg and memcpy

2020-05-15T05:52:31+00:00

cppi5_tr_csf_set() clears previously set Configuration Specific Flags.
Setting the EOP flag clears the SUPR_EVT flag for the last TR which is not
desirable as we do not want to have events from the TR.

Signed-off-by: Peter Ujfalusi 
Link: https://lore.kernel.org/r/20200512134531.5742-1-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul