linux-kernel - [PATCH 3/3] DMAENGINE: define a dummy filter function for ste

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Date:	Wed, 6 Oct 2010 11:05:29 +0200
From:	Linus Walleij <linus.walleij@...ricsson.com>
To:	Dan Williams <dan.j.williams@...el.com>
Cc:	<linux-kernel@...r.kernel.org>,
	Linus Walleij <linus.walleij@...ricsson.com>
Subject: [PATCH 3/3] DMAENGINE: define a dummy filter function for ste_dma40

All platform data has to be made conditional on CONFIG_STEDMA40
or we can provide a simple dummy filter functions as to avoid
cluttering the code with other #ifdef:s.

Signed-off-by: Linus Walleij <linus.walleij@...ricsson.com>
---
Dan I have had to bring this over from the platform (ARM) tree
since the previous patch now collides with it so please pick
it in through async_tx...
---
 arch/arm/plat-nomadik/include/plat/ste_dma40.h |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/arch/arm/plat-nomadik/include/plat/ste_dma40.h b/arch/arm/plat-nomadik/include/plat/ste_dma40.h
index 660552d..3dd4255 100644
--- a/arch/arm/plat-nomadik/include/plat/ste_dma40.h
+++ b/arch/arm/plat-nomadik/include/plat/ste_dma40.h
@@ -162,6 +162,8 @@ struct stedma40_platform_data {
 	int				 disabled_channels[STEDMA40_MAX_PHYS];
 };
 
+#ifdef CONFIG_STE_DMA40
+
 /**
  * stedma40_filter() - Provides stedma40_chan_cfg to the
  * ste_dma40 dma driver via the dmaengine framework.
@@ -223,4 +225,21 @@ dma_async_tx_descriptor *stedma40_slave_mem(struct dma_chan *chan,
 						  direction, flags);
 }
 
+#else
+static inline bool stedma40_filter(struct dma_chan *chan, void *data)
+{
+	return false;
+}
+
+static inline struct
+dma_async_tx_descriptor *stedma40_slave_mem(struct dma_chan *chan,
+					    dma_addr_t addr,
+					    unsigned int size,
+					    enum dma_data_direction direction,
+					    unsigned long flags)
+{
+	return NULL;
+}
+#endif
+
 #endif
-- 
1.6.3.3

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