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media: rcar_drif: Use dma_request_chan() instead dma_request_slave_channel() 

dma_request_slave_channel() is a wrapper on top of dma_request_chan()
eating up the error code.

By using dma_request_chan() directly the driver can support deferred
probing against DMA.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Peter Ujfalusi 2019-12-17 11:40:25 +01:00 committed by Mauro Carvalho Chehab
parent eee16d210c
commit 1b5482e0d2
1 changed files with 3 additions and 3 deletions
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6
drivers/media/platform/rcar_drif.c
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@ -275,10 +275,10 @@ static int rcar_drif_alloc_dmachannels(struct rcar_drif_sdr *sdr)
for_each_rcar_drif_channel(i, &sdr->cur_ch_mask) {
struct rcar_drif *ch = sdr->ch[i];
ch->dmach = dma_request_slave_channel(&ch->pdev->dev, "rx");
if (!ch->dmach) {
ch->dmach = dma_request_chan(&ch->pdev->dev, "rx");
if (IS_ERR(ch->dmach)) {
rdrif_err(sdr, "ch%u: dma channel req failed\n", i);
ret = -ENODEV;
ret = PTR_ERR(ch->dmach);
goto dmach_error;
}