On 06/05/2019 15.34, Peter Ujfalusi wrote: > dma_get_any_slave_channel() would skip using the filter function, which > in some cases needed to be executed before the alloc_chan_resources > callback to make sure that all parameters are provided for the slave > channel. This can be dropped in favor of https://patchwork.kernel.org/patch/10932299/ from Baolin Wangm and using __dma_request_channel() in the k3-udma driver. - Péter > > Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx> > --- > drivers/dma/dmaengine.c | 7 ++++--- > include/linux/dmaengine.h | 5 ++++- > 2 files changed, 8 insertions(+), 4 deletions(-) > > diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c > index 8eed5ff0fc01..7ec93be12088 100644 > --- a/drivers/dma/dmaengine.c > +++ b/drivers/dma/dmaengine.c > @@ -617,7 +617,8 @@ struct dma_chan *dma_get_slave_channel(struct dma_chan *chan) > } > EXPORT_SYMBOL_GPL(dma_get_slave_channel); > > -struct dma_chan *dma_get_any_slave_channel(struct dma_device *device) > +struct dma_chan *dmadev_get_slave_channel(struct dma_device *device, > + dma_filter_fn fn, void *fn_param) > { > dma_cap_mask_t mask; > struct dma_chan *chan; > @@ -628,13 +629,13 @@ struct dma_chan *dma_get_any_slave_channel(struct dma_device *device) > /* lock against __dma_request_channel */ > mutex_lock(&dma_list_mutex); > > - chan = find_candidate(device, &mask, NULL, NULL); > + chan = find_candidate(device, &mask, fn, fn_param); > > mutex_unlock(&dma_list_mutex); > > return IS_ERR(chan) ? NULL : chan; > } > -EXPORT_SYMBOL_GPL(dma_get_any_slave_channel); > +EXPORT_SYMBOL_GPL(dmadev_get_slave_channel); > > /** > * __dma_request_channel - try to allocate an exclusive channel > diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h > index c1486564a314..4774b66f2064 100644 > --- a/include/linux/dmaengine.h > +++ b/include/linux/dmaengine.h > @@ -1541,7 +1541,10 @@ int dmaenginem_async_device_register(struct dma_device *device); > void dma_async_device_unregister(struct dma_device *device); > void dma_run_dependencies(struct dma_async_tx_descriptor *tx); > struct dma_chan *dma_get_slave_channel(struct dma_chan *chan); > -struct dma_chan *dma_get_any_slave_channel(struct dma_device *device); > +struct dma_chan *dmadev_get_slave_channel(struct dma_device *device, > + dma_filter_fn fn, void *fn_param); > +#define dma_get_any_slave_channel(device) \ > + dmadev_get_slave_channel(device, NULL, NULL) > #define dma_request_channel(mask, x, y) __dma_request_channel(&(mask), x, y) > #define dma_request_slave_channel_compat(mask, x, y, dev, name) \ > __dma_request_slave_channel_compat(&(mask), x, y, dev, name) > Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
