From: Alex Smith Date: Fri, 24 Jul 2015 16:24:24 +0000 (+0100) Subject: dmaengine: jz4780: Ensure channel is on correct controller in filter X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=026fd406c81b8a2936e77342a255d55534f92061;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git dmaengine: jz4780: Ensure channel is on correct controller in filter When scanning for a free DMA channel, the filter function should ensure that the channel is on the controller that it was requested to be on in the DT. Signed-off-by: Alex Smith Cc: Vinod Koul Cc: Zubair Lutfullah Kakakhel Cc: dmaengine@vger.kernel.org Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c index 40baaf00b971..572e07e4b42d 100644 --- a/drivers/dma/dma-jz4780.c +++ b/drivers/dma/dma-jz4780.c @@ -145,7 +145,8 @@ struct jz4780_dma_dev { struct jz4780_dma_chan chan[JZ_DMA_NR_CHANNELS]; }; -struct jz4780_dma_data { +struct jz4780_dma_filter_data { + struct device_node *of_node; uint32_t transfer_type; int channel; }; @@ -684,7 +685,10 @@ static bool jz4780_dma_filter_fn(struct dma_chan *chan, void *param) { struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(chan); struct jz4780_dma_dev *jzdma = jz4780_dma_chan_parent(jzchan); - struct jz4780_dma_data *data = param; + struct jz4780_dma_filter_data *data = param; + + if (jzdma->dma_device.dev->of_node != data->of_node) + return false; if (data->channel > -1) { if (data->channel != jzchan->id) @@ -703,11 +707,12 @@ static struct dma_chan *jz4780_of_dma_xlate(struct of_phandle_args *dma_spec, { struct jz4780_dma_dev *jzdma = ofdma->of_dma_data; dma_cap_mask_t mask = jzdma->dma_device.cap_mask; - struct jz4780_dma_data data; + struct jz4780_dma_filter_data data; if (dma_spec->args_count != 2) return NULL; + data.of_node = ofdma->of_node; data.transfer_type = dma_spec->args[0]; data.channel = dma_spec->args[1];