linux-stable.git/drivers/dma/sh, branch linux-5.14.y

dmaengine: usb-dmac: Fix PM reference leak in usb_dmac_probe()

2021-07-14T05:11:21+00:00

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by moving the error_pm label above the pm_runtime_put() in
the error path.

Reported-by: Hulk Robot 
Signed-off-by: Yu Kuai 
Link: https://lore.kernel.org/r/20210706124521.1371901-1-yukuai3@huawei.com
Signed-off-by: Vinod Koul

Merge tag 'dmaengine-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine

2021-07-05T19:05:13+00:00

Pull dmaengine updates from Vinod Koul:
 "This time around we have a smaller pull request than usual and this
  includes code removal, so should be good!

  New drivers/devices
   - Support for QCOM SM8250 GPI DMA
   - removal of shdma-of driver and binding

  Updates:
   - arm-pl08x yaml binding move
   - altera-msgdma gained DT support
   - removal of imx-sdma platform data support
   - idxd and xilinx driver updates"

* tag 'dmaengine-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (22 commits)
  dmaengine: imx-sdma: Remove platform data header
  dmaengine: xilinx: dpdma: Fix spacing around addr[i-1]
  dmaengine: xilinx: dpdma: Use kernel type u32 over uint32_t
  dmaengine: altera-msgdma: add OF support
  MAINTAINERS: add entry for Altera mSGDMA
  dt-bindings: dma: add schema for altera-msgdma
  dmaengine: xilinx: dpdma: fix kernel-doc
  dmaengine: sf-pdma: apply proper spinlock flags in sf_pdma_prep_dma_memcpy()
  dmaengine: sh: Remove unused shdma-of driver
  dt-bindings: dmaengine: Remove SHDMA Device Tree bindings
  dmaengine: qcom: gpi: Add SM8250 compatible
  dt-bindings: dmaengine: qcom: gpi: add compatible for sm8250
  dmaengine: sun4i: Use list_move_tail instead of list_del/list_add_tail
  dmaengine: ti: omap-dma: Skip pointless cpu_pm context restore on errors
  dmaengine: hsu: Account transferred bytes
  dmaengine: Move kdoc description of struct dma_chan_percpu closer to it
  dmaengine: xilinx: dpdma: Print debug message when losing vsync race
  dmaengine: xilinx: dpdma: Print channel number in kernel log messages
  dt-bindings: dma: convert arm-pl08x to yaml
  dmaengine: idxd: remove devm allocation for idxd->int_handles
  ...

dmaengine: sh: Remove unused shdma-of driver

2021-06-16T10:38:19+00:00

Remove the DT-based Renesas SHDMA DMA multiplexer driver, as it is
unused.  The DMA multiplexer node and one DMA controller instance were
added to the R-Mobile APE6 .dtsi file, but DMA support was never fully
enabled, cfr. commit a19788612f51b787 ("dmaengine: sh: Remove R-Mobile
APE6 support").

Signed-off-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/r/e9445a5f4ac15fc4d3b376b5e675e39f8c95b967.1623406640.git.geert+renesas@glider.be
Signed-off-by: Vinod Koul

dmaengine: rcar-dmac: Fix PM reference leak in rcar_dmac_probe()

2021-06-03T11:07:37+00:00

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Reported-by: Hulk Robot 
Signed-off-by: Zou Wei 
Reviewed-by: Laurent Pinchart 
Reviewed-by: Geert Uytterhoeven 
Link: https://lore.kernel.org/r/1622442963-54095-1-git-send-email-zou_wei@huawei.com
Signed-off-by: Vinod Koul

dmaengine: rcar-dmac: Add support for R-Car V3U

2021-02-01T05:48:59+00:00

The DMACs (both SYS-DMAC and RT-DMAC) on R-Car V3U differ slightly from
the DMACs on R-Car Gen2 and other R-Car Gen3 SoCs:
  1. The per-channel registers are located in a second register block.
     Add support for mapping the second block, using the appropriate
     offsets and stride.
  2. The common Channel Clear Register (DMACHCLR) was replaced by a
     per-channel register.
     Update rcar_dmac_chan_clear{,_all}() to handle this.
     As rcar_dmac_init() needs to clear the status before the individual
     channels are probed, channel index and base address initialization
     are moved forward.

Inspired by a patch in the BSP by Phong Hoang
.

Signed-off-by: Geert Uytterhoeven 
Tested-by: Wolfram Sang 
Tested-by: Yoshihiro Shimoda 
Reviewed-by: Yoshihiro Shimoda 
Link: https://lore.kernel.org/r/20210128084455.2237256-5-geert+renesas@glider.be
Signed-off-by: Vinod Koul

dmaengine: rcar-dmac: Add helpers for clearing DMA channel status

2021-02-01T05:48:59+00:00

Extract the code to clear the status of one or all channels into their
own helpers, to prepare for the different handling of the R-Car V3U SoC.

Signed-off-by: Geert Uytterhoeven 
Tested-by: Wolfram Sang 
Tested-by: Yoshihiro Shimoda 
Reviewed-by: Wolfram Sang 
Reviewed-by: Laurent Pinchart 
Reviewed-by: Yoshihiro Shimoda 
Link: https://lore.kernel.org/r/20210128084455.2237256-4-geert+renesas@glider.be
Signed-off-by: Vinod Koul

dmaengine: rcar-dmac: Add for_each_rcar_dmac_chan() helper

2021-02-01T05:48:59+00:00

Add a helper macro for iterating over all DMAC channels, taking into
account the channel mask.  Use it where appropriate, to simplify code.

Restore "reverse Christmas tree" order of local variables while adding a
new variable.

Signed-off-by: Geert Uytterhoeven 
Tested-by: Wolfram Sang 
Tested-by: Yoshihiro Shimoda 
Reviewed-by: Wolfram Sang 
Reviewed-by: Laurent Pinchart 
Reviewed-by: Yoshihiro Shimoda 
Link: https://lore.kernel.org/r/20210128084455.2237256-3-geert+renesas@glider.be
Signed-off-by: Vinod Koul

dmaengine: rcar-dmac: drop double zeroing

2020-10-05T04:48:08+00:00

sg_init_table zeroes its first argument, so the allocation of that argument
doesn't have to.

the semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// 
@@
expression x,n,flags;
@@

x =
- kcalloc
+ kmalloc_array
  (n,sizeof(*x),flags)
...
sg_init_table(x,n)
// 

Signed-off-by: Julia Lawall 

Link: https://lore.kernel.org/r/1600601186-7420-10-git-send-email-Julia.Lawall@inria.fr
Signed-off-by: Vinod Koul

dmaengine: sh: drop double zeroing

2020-10-05T04:48:08+00:00

sg_init_table zeroes its first argument, so the allocation of that argument
doesn't have to.

the semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// 
@@
expression x,n,flags;
@@

x =
- kcalloc
+ kmalloc_array
  (n,sizeof(*x),flags)
...
sg_init_table(x,n)
// 

Signed-off-by: Julia Lawall 

Link: https://lore.kernel.org/r/1600601186-7420-5-git-send-email-Julia.Lawall@inria.fr
Signed-off-by: Vinod Koul

dmaengine: Kconfig: Update description for RCAR_DMAC config

2020-09-11T12:18:28+00:00

rcar-dmac driver is used on Renesas R-Car Gen{2,3} and Renesas
RZ/G{1,2} SoC's, update the same to reflect the description
for RCAR_DMAC config.

Signed-off-by: Lad Prabhakar 
Reviewed-by: Geert Uytterhoeven 
Reviewed-by: Chris Paterson 
Link: https://lore.kernel.org/r/20200911095734.19348-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Vinod Koul