diff options
| author | Thomas Abraham <thomas.abraham@linaro.org> | 2011-10-24 11:43:02 +0200 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-12-23 10:07:02 +0900 |
| commit | 3e2ec13a8185183cd7ff237dadc948a0f9f7398f (patch) | |
| tree | fa5efc91ccbb6fe013c2614ac9b676c4192b6f60 /drivers/dma | |
| parent | a169a888bf8c5490ae0377fcd0ad22c6af9fd8e7 (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>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/pl330.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 571041477ab2..0c434dca4bf2 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); |