mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-16 17:23:55 +08:00
spi: atmel: 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> Link: https://lore.kernel.org/r/20191212135550.4634-2-peter.ujfalusi@ti.com Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
parent
851c902fd2
commit
d947c9d26c
@ -514,26 +514,19 @@ static int atmel_spi_configure_dma(struct spi_master *master,
|
||||
master->dma_tx = dma_request_chan(dev, "tx");
|
||||
if (IS_ERR(master->dma_tx)) {
|
||||
err = PTR_ERR(master->dma_tx);
|
||||
if (err == -EPROBE_DEFER) {
|
||||
dev_warn(dev, "no DMA channel available at the moment\n");
|
||||
goto error_clear;
|
||||
}
|
||||
dev_err(dev,
|
||||
"DMA TX channel not available, SPI unable to use DMA\n");
|
||||
err = -EBUSY;
|
||||
if (err != -EPROBE_DEFER)
|
||||
dev_err(dev, "No TX DMA channel, DMA is disabled\n");
|
||||
goto error_clear;
|
||||
}
|
||||
|
||||
master->dma_rx = dma_request_chan(dev, "rx");
|
||||
if (IS_ERR(master->dma_rx)) {
|
||||
err = PTR_ERR(master->dma_rx);
|
||||
/*
|
||||
* No reason to check EPROBE_DEFER here since we have already requested
|
||||
* tx channel. If it fails here, it's for another reason.
|
||||
* No reason to check EPROBE_DEFER here since we have already
|
||||
* requested tx channel.
|
||||
*/
|
||||
master->dma_rx = dma_request_slave_channel(dev, "rx");
|
||||
|
||||
if (!master->dma_rx) {
|
||||
dev_err(dev,
|
||||
"DMA RX channel not available, SPI unable to use DMA\n");
|
||||
err = -EBUSY;
|
||||
dev_err(dev, "No RX DMA channel, DMA is disabled\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
@ -548,7 +541,7 @@ static int atmel_spi_configure_dma(struct spi_master *master,
|
||||
|
||||
return 0;
|
||||
error:
|
||||
if (master->dma_rx)
|
||||
if (!IS_ERR(master->dma_rx))
|
||||
dma_release_channel(master->dma_rx);
|
||||
if (!IS_ERR(master->dma_tx))
|
||||
dma_release_channel(master->dma_tx);
|
||||
|
Loading…
Reference in New Issue
Block a user