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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>
This commit is contained in:
Peter Ujfalusi 2016-07-20 11:50:29 +03:00 committed by Vinod Koul
parent b57ebe080c
commit 2d1a9a946f
1 changed files with 14 additions and 6 deletions
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20
drivers/dma/omap-dma.c
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@ -35,7 +35,7 @@ struct omap_dmadev {
unsigned dma_requests; unsigned dma_requests;
spinlock_t irq_lock; spinlock_t irq_lock;
uint32_t irq_enable_mask; uint32_t irq_enable_mask;
struct omap_chan *lch_map[OMAP_SDMA_CHANNELS]; struct omap_chan **lch_map;
}; };
struct omap_chan { 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->lock);
spin_lock_init(&od->irq_lock); spin_lock_init(&od->irq_lock);
od->dma_requests = OMAP_SDMA_REQUESTS; if (!pdev->dev.of_node) {
if (pdev->dev.of_node && of_property_read_u32(pdev->dev.of_node, od->dma_requests = od->plat->dma_attr->lch_count;
"dma-requests", if (unlikely(!od->dma_requests))
&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, dev_info(&pdev->dev,
"Missing dma-requests property, using %u.\n", "Missing dma-requests property, using %u.\n",
OMAP_SDMA_REQUESTS); 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); rc = omap_dma_chan_init(od);
if (rc) { if (rc) {
omap_dma_free(od); omap_dma_free(od);