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authorPeter Ujfalusi <peter.ujfalusi@ti.com>2016-07-20 11:50:29 +0300
committerVinod Koul <vinod.koul@intel.com>2016-08-10 22:59:12 +0530
commit2d1a9a946faebfedd660a1f1c2b90984fff41f91 (patch)
tree3cdb93e68802191edc1f42995e1df9a5d791bf10 /drivers/dma
parentb57ebe080cffb323b062fbff1a35ef59de3bd5d1 (diff)
downloadop-kernel-dev-2d1a9a946faebfedd660a1f1c2b90984fff41f91.zip
op-kernel-dev-2d1a9a946faebfedd660a1f1c2b90984fff41f91.tar.gz
dmaengine: omap-dma: Dynamically allocate memory for lch_map
On OMAP1 platforms we do not have 32 channels available. Allocate the lch_map based on the available channels. This way we are not going to have more visible channels then it is available on the platform. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/omap-dma.c20
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c
index 3c44594..774306d 100644
--- a/drivers/dma/omap-dma.c
+++ b/drivers/dma/omap-dma.c
@@ -35,7 +35,7 @@ struct omap_dmadev {
unsigned dma_requests;
spinlock_t irq_lock;
uint32_t irq_enable_mask;
- struct omap_chan *lch_map[OMAP_SDMA_CHANNELS];
+ struct omap_chan **lch_map;
};
struct omap_chan {
@@ -1223,16 +1223,24 @@ static int omap_dma_probe(struct platform_device *pdev)
spin_lock_init(&od->lock);
spin_lock_init(&od->irq_lock);
- od->dma_requests = OMAP_SDMA_REQUESTS;
- if (pdev->dev.of_node && of_property_read_u32(pdev->dev.of_node,
- "dma-requests",
- &od->dma_requests)) {
+ if (!pdev->dev.of_node) {
+ od->dma_requests = od->plat->dma_attr->lch_count;
+ if (unlikely(!od->dma_requests))
+ od->dma_requests = OMAP_SDMA_REQUESTS;
+ } else if (of_property_read_u32(pdev->dev.of_node, "dma-requests",
+ &od->dma_requests)) {
dev_info(&pdev->dev,
"Missing dma-requests property, using %u.\n",
OMAP_SDMA_REQUESTS);
+ od->dma_requests = OMAP_SDMA_REQUESTS;
}
- for (i = 0; i < OMAP_SDMA_CHANNELS; i++) {
+ od->lch_map = devm_kcalloc(&pdev->dev, od->dma_requests,
+ sizeof(*od->lch_map), GFP_KERNEL);
+ if (!od->lch_map)
+ return -ENOMEM;
+
+ for (i = 0; i < od->dma_requests; i++) {
rc = omap_dma_chan_init(od);
if (rc) {
omap_dma_free(od);
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