* [PATCH] ata: pxa: Use dma_request_chan() instead dma_request_slave_channel() @ 2019-12-17 7:40 ` Peter Ujfalusi 2020-01-13 11:22 ` Bartlomiej Zolnierkiewicz 0 siblings, 1 reply; 2+ messages in thread From: Peter Ujfalusi @ 2019-12-17 7:40 UTC (permalink / raw) To: b.zolnierkie, axboe; +Cc: vkoul, linux-ide, linux-kernel 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> --- drivers/ata/pata_pxa.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/ata/pata_pxa.c b/drivers/ata/pata_pxa.c index 41430f79663c..71678bed04b0 100644 --- a/drivers/ata/pata_pxa.c +++ b/drivers/ata/pata_pxa.c @@ -274,10 +274,9 @@ static int pxa_ata_probe(struct platform_device *pdev) /* * Request the DMA channel */ - data->dma_chan = - dma_request_slave_channel(&pdev->dev, "data"); - if (!data->dma_chan) - return -EBUSY; + data->dma_chan = dma_request_chan(&pdev->dev, "data"); + if (IS_ERR(data->dma_chan)) + return PTR_ERR(data->dma_chan); ret = dmaengine_slave_config(data->dma_chan, &config); if (ret < 0) { dev_err(&pdev->dev, "dma configuration failed: %d\n", ret); -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki ^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ata: pxa: Use dma_request_chan() instead dma_request_slave_channel() 2019-12-17 7:40 ` [PATCH] ata: pxa: Use dma_request_chan() instead dma_request_slave_channel() Peter Ujfalusi @ 2020-01-13 11:22 ` Bartlomiej Zolnierkiewicz 0 siblings, 0 replies; 2+ messages in thread From: Bartlomiej Zolnierkiewicz @ 2020-01-13 11:22 UTC (permalink / raw) To: Peter Ujfalusi; +Cc: axboe, vkoul, linux-ide, linux-kernel On 12/17/19 8:40 AM, Peter Ujfalusi wrote: > 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> Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics > --- > drivers/ata/pata_pxa.c | 7 +++---- > 1 file changed, 3 insertions(+), 4 deletions(-) > > diff --git a/drivers/ata/pata_pxa.c b/drivers/ata/pata_pxa.c > index 41430f79663c..71678bed04b0 100644 > --- a/drivers/ata/pata_pxa.c > +++ b/drivers/ata/pata_pxa.c > @@ -274,10 +274,9 @@ static int pxa_ata_probe(struct platform_device *pdev) > /* > * Request the DMA channel > */ > - data->dma_chan = > - dma_request_slave_channel(&pdev->dev, "data"); > - if (!data->dma_chan) > - return -EBUSY; > + data->dma_chan = dma_request_chan(&pdev->dev, "data"); > + if (IS_ERR(data->dma_chan)) > + return PTR_ERR(data->dma_chan); > ret = dmaengine_slave_config(data->dma_chan, &config); > if (ret < 0) { > dev_err(&pdev->dev, "dma configuration failed: %d\n", ret); > ^ permalink raw reply [flat|nested] 2+ messages in thread
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2019-12-17 7:40 ` [PATCH] ata: pxa: Use dma_request_chan() instead dma_request_slave_channel() Peter Ujfalusi
2020-01-13 11:22 ` Bartlomiej Zolnierkiewicz
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