linux-stable.git/drivers/dma/sh, branch linux-3.17.y

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

dma: rcar-audmapp: don't keep audmapp_slave_config for each channeles

2014-07-08T09:12:28+00:00

Current audmapp driver is keeping audmapp_slave_config
for each channeles, but, nessasary information is only "chcr".
Current style (= keeping audmapp_slave_config) is
not good match for DT support.
Keep "chcr" instead of audmapp_slave_config

Signed-off-by: Kuninori Morimoto 
Signed-off-by: Simon Horman

dma: rcar-audmapp: enable .set_slave

2014-07-08T09:07:11+00:00

Current .set_slave callback did nothing,
since it assumed src/dst address come from platform settings.
But, it isn't good match to DT probing.
This patch enables .set_slave callback to this issue.

Signed-off-by: Kuninori Morimoto 
Signed-off-by: Simon Horman