linux.git/drivers/dma/sh, branch v5.13

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

Merge tag 'v5.9-rc4' into next

2020-09-11T12:15:36+00:00

Linux 5.9-rc4

dmaengine: rcar-dmac: Drop local dma_parms

2020-09-11T12:12:13+00:00

Since commit 9495b7e92f71 ("driver core: platform: Initialize dma_parms
for platform devices"), struct platform_device already provides a
dma_parms structure, so we can save allocating another one.

Signed-off-by: Robin Murphy 
Link: https://lore.kernel.org/r/23d40e15af10aad4724a2770ec18b4b28c1b8a71.1599164692.git.robin.murphy@arm.com
Signed-off-by: Vinod Koul

treewide: Use fallthrough pseudo-keyword

2020-08-23T22:36:59+00:00

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

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