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| author | Vinod Koul <vinod.koul@intel.com> | 2016-05-17 07:43:40 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-05-17 07:43:40 +0300 |
| commit | a365c9685438713dbf88828282c4699f571b97de (patch) | |
| tree | 99771a8be3519ff8fc1ff477e9f41cb53e2a1af7 /drivers/dma | |
| parent | 511deae0261c839461948f2d4d1c13b8c8a59cd8 (diff) | |
| parent | 20ea6be6bffd4da8cfe3aeea9e6a090f346a54da (diff) | |
| download | linux-a365c9685438713dbf88828282c4699f571b97de.tar.xz | |
Merge branch 'topic/core' into for-linus
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/dmaengine.c | 9 | ||||
| -rw-r--r-- | drivers/dma/of-dma.c | 12 |
2 files changed, 15 insertions, 6 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index ca1400d66957..8c9f45fd55fc 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -482,7 +482,8 @@ int dma_get_slave_caps(struct dma_chan *chan, struct dma_slave_caps *caps) device = chan->device; /* check if the channel supports slave transactions */ - if (!test_bit(DMA_SLAVE, device->cap_mask.bits)) + if (!(test_bit(DMA_SLAVE, device->cap_mask.bits) || + test_bit(DMA_CYCLIC, device->cap_mask.bits))) return -ENXIO; /* @@ -865,12 +866,12 @@ static bool device_has_all_tx_types(struct dma_device *device) return false; #endif - #if defined(CONFIG_ASYNC_MEMCPY) || defined(CONFIG_ASYNC_MEMCPY_MODULE) + #if IS_ENABLED(CONFIG_ASYNC_MEMCPY) if (!dma_has_cap(DMA_MEMCPY, device->cap_mask)) return false; #endif - #if defined(CONFIG_ASYNC_XOR) || defined(CONFIG_ASYNC_XOR_MODULE) + #if IS_ENABLED(CONFIG_ASYNC_XOR) if (!dma_has_cap(DMA_XOR, device->cap_mask)) return false; @@ -880,7 +881,7 @@ static bool device_has_all_tx_types(struct dma_device *device) #endif #endif - #if defined(CONFIG_ASYNC_PQ) || defined(CONFIG_ASYNC_PQ_MODULE) + #if IS_ENABLED(CONFIG_ASYNC_PQ) if (!dma_has_cap(DMA_PQ, device->cap_mask)) return false; diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c index 1e1f2986eba8..faae0bfe1109 100644 --- a/drivers/dma/of-dma.c +++ b/drivers/dma/of-dma.c @@ -240,8 +240,9 @@ struct dma_chan *of_dma_request_slave_channel(struct device_node *np, struct of_phandle_args dma_spec; struct of_dma *ofdma; struct dma_chan *chan; - int count, i; + int count, i, start; int ret_no_channel = -ENODEV; + static atomic_t last_index; if (!np || !name) { pr_err("%s: not enough information provided\n", __func__); @@ -259,8 +260,15 @@ struct dma_chan *of_dma_request_slave_channel(struct device_node *np, return ERR_PTR(-ENODEV); } + /* + * approximate an average distribution across multiple + * entries with the same name + */ + start = atomic_inc_return(&last_index); for (i = 0; i < count; i++) { - if (of_dma_match_channel(np, name, i, &dma_spec)) + if (of_dma_match_channel(np, name, + (i + start) % count, + &dma_spec)) continue; mutex_lock(&of_dma_lock); |