dmaengine: Add privatecnt to revert DMA_PRIVATE property
Currently dma_request_channel() set DMA_PRIVATE capability but never clear it. So if a public channel was once grabbed by dma_request_channel(), the device stay PRIVATE forever. Add privatecnt member to dma_device to correctly revert it. [lg@denx.de: fix bad usage of 'chan' in dma_async_device_register] Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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Dan Williams
parent
e44e0aa3cf
commit
0f571515c3
@ -202,6 +202,7 @@ struct dma_async_tx_descriptor {
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/**
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* struct dma_device - info on the entity supplying DMA services
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* @chancnt: how many DMA channels are supported
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* @privatecnt: how many DMA channels are requested by dma_request_channel
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* @channels: the list of struct dma_chan
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* @global_node: list_head for global dma_device_list
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* @cap_mask: one or more dma_capability flags
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@ -224,6 +225,7 @@ struct dma_async_tx_descriptor {
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struct dma_device {
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unsigned int chancnt;
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unsigned int privatecnt;
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struct list_head channels;
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struct list_head global_node;
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dma_cap_mask_t cap_mask;
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@ -352,6 +354,13 @@ __dma_cap_set(enum dma_transaction_type tx_type, dma_cap_mask_t *dstp)
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set_bit(tx_type, dstp->bits);
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}
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#define dma_cap_clear(tx, mask) __dma_cap_clear((tx), &(mask))
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static inline void
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__dma_cap_clear(enum dma_transaction_type tx_type, dma_cap_mask_t *dstp)
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{
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clear_bit(tx_type, dstp->bits);
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}
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#define dma_cap_zero(mask) __dma_cap_zero(&(mask))
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static inline void __dma_cap_zero(dma_cap_mask_t *dstp)
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{
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