diff options
| author | Thomas Abraham <thomas.abraham@linaro.org> | 2011-12-15 15:13:11 +0800 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2011-12-26 22:33:38 +0800 |
| commit | cd853d27ca391b5af9d1b84d7bed81668d78f181 (patch) | |
| tree | bdb9b638af210075ab90671ea59a81fd6d3391da | |
| parent | cf808ed2b289edb731123c4de00506571c4d3d2b (diff) | |
DMA: PL330: move filter function into driver
The dma channel selection filter function is moved from plat-samsung
into the pl330 driver. In additon to that, a check is added in the
filter function to ensure that the channel on which the filter has
been invoked is pl330 channel instance (and avoid any incorrect
access of chan->private in a system with multiple types of DMA
drivers).
Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
| -rw-r--r-- | arch/arm/plat-samsung/dma-ops.c | 6 | ||||
| -rw-r--r-- | drivers/dma/pl330.c | 15 | ||||
| -rw-r--r-- | include/linux/amba/pl330.h | 2 |
3 files changed, 17 insertions, 6 deletions
diff --git a/arch/arm/plat-samsung/dma-ops.c b/arch/arm/plat-samsung/dma-ops.c index 93a994a5dd8..889c2c22325 100644 --- a/arch/arm/plat-samsung/dma-ops.c +++ b/arch/arm/plat-samsung/dma-ops.c @@ -18,12 +18,6 @@ #include <mach/dma.h> -static inline bool pl330_filter(struct dma_chan *chan, void *param) -{ - struct dma_pl330_peri *peri = chan->private; - return peri->peri_id == (unsigned)param; -} - static unsigned samsung_dmadev_request(enum dma_ch dma_ch, struct samsung_dma_info *info) { diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 571041477ab..0c434dca4bf 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -116,6 +116,9 @@ struct dma_pl330_desc { struct dma_pl330_chan *pchan; }; +/* forward declaration */ +static struct amba_driver pl330_driver; + static inline struct dma_pl330_chan * to_pchan(struct dma_chan *ch) { @@ -267,6 +270,18 @@ static void dma_pl330_rqcb(void *token, enum pl330_op_err err) tasklet_schedule(&pch->task); } +bool pl330_filter(struct dma_chan *chan, void *param) +{ + struct dma_pl330_peri *peri; + + if (chan->device->dev->driver != &pl330_driver.drv) + return false; + + peri = chan->private; + return peri->peri_id == (unsigned)param; +} +EXPORT_SYMBOL(pl330_filter); + static int pl330_alloc_chan_resources(struct dma_chan *chan) { struct dma_pl330_chan *pch = to_pchan(chan); diff --git a/include/linux/amba/pl330.h b/include/linux/amba/pl330.h index d12f077a6da..6db72dae2f1 100644 --- a/include/linux/amba/pl330.h +++ b/include/linux/amba/pl330.h @@ -12,6 +12,7 @@ #ifndef __AMBA_PL330_H_ #define __AMBA_PL330_H_ +#include <linux/dmaengine.h> #include <asm/hardware/pl330.h> struct dma_pl330_peri { @@ -38,4 +39,5 @@ struct dma_pl330_platdata { unsigned mcbuf_sz; }; +extern bool pl330_filter(struct dma_chan *chan, void *param); #endif /* __AMBA_PL330_H_ */ |