kernel/linux.git/drivers/dma/sh, branch v3.18.62

dmaengine: shdmac: avoid unused variable warnings

2015-06-28T17:39:26+00:00

[ Upstream commit 7d3beab16dd9eee86bb1a4dd05b51159fc7772f0 ] This driver uses '#ifdef CONFIG_ARCH_SHMOBILE' and '#ifdef CONFIG_ARM' interchangeably in its sh_dmae_probe function, which causes a build warning when building for ARM without also enabling shmobile: dma/sh/shdmac.c: In function sh_dmae_probe: dma/sh/shdmac.c:696:6: warning: unused variable errirq [-Wunused-variable] dma/sh/shdmac.c:695:16: warning: unused variable irqflags [-Wunused-variable] dma/sh/shdmac.c: At top level: dma/sh/shdmac.c:447:20: warning: sh_dmae_err defined but not used [-Wunused-function] This changes all the #ifdef to test for CONFIG_ARCH_SHMOBILE to avoid that warning. An earlier patch from Laurent had fixed the warning for non-ARM case, but it still remained present in ARM randconfig builds. Signed-off-by: Arnd Bergmann Fixes: 52d6a5ee101bf ("DMA: shdma: Fix warnings due to declared but unused symbols") Acked-by: Laurent Pinchart Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dma: rcar-audmapp: Fix for no corresponding slave ID

2014-08-28T07:12:10+00:00

In case of no corresponding slave ID, the audmapp_set_slave() returns -ENXIO same as sh_dmae_set_slave() of shdmac.c. DMAEngine might return wrong channel without this patch Signed-off-by: Ryo Kataoka Signed-off-by: Jun Watanabe , Signed-off-by: Kuninori Morimoto Signed-off-by: Vinod Koul

dmaengine: Remove the context argument to the prep_dma_cyclic operation

2014-08-04T08:11:50+00:00

The argument is always set to NULL and never used. Remove it. Signed-off-by: Laurent Pinchart Signed-off-by: Vinod Koul

dmaengine: shdma: Allocate cyclic sg list dynamically

2014-07-31T11:45:45+00:00

The sg list used to prepare cyclic DMA descriptors is currently allocated statically on the stack as an array of 32 elements. This makes the shdma_prep_dma_cyclic() function consume a lot of stack space, as reported by the compiler: drivers/dma/sh/shdma-base.c: In function ‘shdma_prep_dma_cyclic’: drivers/dma/sh/shdma-base.c:715:1: warning: the frame size of 1056 bytes is larger than 1024 bytes [-Wframe-larger-than=] Given the limited Linux kernel stack size, this could lead to stack overflows. Fix the problem by allocating the sg list dynamically. Signed-off-by: Laurent Pinchart Signed-off-by: Simon Horman Signed-off-by: Vinod Koul

dmaengine: shdma: Make channel filter ignore unrelated devices

2014-07-31T11:45:45+00:00

The shdma_chan_filter() function relies on the DMA channel being embedded in an shdma_chan structure. If this assumption isn't true, for instance when the system contains DMA channels supported by an unrelated driver, the function will crash. Avoid this by returning false directly when the channel belongs to an unrelated device. Signed-off-by: Laurent Pinchart Signed-off-by: Simon Horman Signed-off-by: Vinod Koul

dmaengine: sh: Rework Kconfig and Makefile

2014-07-31T11:45:45+00:00

Separate helpers and drivers in the Kconfig and Makefile to improve readability and move the CONFIG_OF dependency from the Makefile to Kconfig. [pebolle@tiscali.nl: reported need to rename SHDMA_R8A73A4 instances] Reported-by: Paul Bolle Signed-off-by: Laurent Pinchart [horms+renesas@verge.net.au: squashed rename of SHDMA_R8A73A4 instances] Signed-off-by: Simon Horman Signed-off-by: Vinod Koul

Merge commit 'renesas-rcar-audmapp-for-v3.17' into for-linus

2014-07-28T11:56:36+00:00

dmaengine: shdma: Use defines instead of hardcoded numbers

2014-07-15T09:02:29+00:00

Signed-off-by: Geert Uytterhoeven Signed-off-by: Simon Horman

dma: rcar-audmapp: add DT support

2014-07-11T11:35:08+00:00

This patch adds DT support to Audio DMAC peri peri driver. Signed-off-by: Kuninori Morimoto [horms+renesas@verge.net.au: Do not add trailing blank line to rcar-audmapp.txt] [horms+renesas@verge.net.au: squashed patch to add NULL terminater to audmapp_of_match] Signed-off-by: Simon Horman Signed-off-by: Kuninori Morimoto Signed-off-by: Simon Horman

dmaengine: shdma: Add more register documentation

2014-07-09T08:55:57+00:00

Also add a few definitions that were missing. Signed-off-by: Geert Uytterhoeven Signed-off-by: Simon Horman