Hi,
Le lun. 12 mars 2018 à 18:55, Ezequiel Garcia
<ezequiel@xxxxxxxxxxxxxxxxxxxx> a écrit :
From: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxx>
Replace dma_request_channel() with dma_request_chan(),
which also supports probing from the devicetree.
Tested-by: Mathieu Malaterre <malat@xxxxxxxxxx>
Signed-off-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxx>
---
drivers/mmc/host/jz4740_mmc.c | 22 +++++++---------------
1 file changed, 7 insertions(+), 15 deletions(-)
diff --git a/drivers/mmc/host/jz4740_mmc.c
b/drivers/mmc/host/jz4740_mmc.c
index c3ec8e662706..37183fe32ef8 100644
--- a/drivers/mmc/host/jz4740_mmc.c
+++ b/drivers/mmc/host/jz4740_mmc.c
@@ -225,31 +225,23 @@ static void
jz4740_mmc_release_dma_channels(struct jz4740_mmc_host *host)
static int jz4740_mmc_acquire_dma_channels(struct jz4740_mmc_host
*host)
{
- dma_cap_mask_t mask;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
-
- host->dma_tx = dma_request_channel(mask, NULL, host);
- if (!host->dma_tx) {
+ host->dma_tx = dma_request_chan(mmc_dev(host->mmc), "tx");
+ if (IS_ERR(host->dma_tx)) {
dev_err(mmc_dev(host->mmc), "Failed to get dma_tx channel\n");
- return -ENODEV;
+ return PTR_ERR(host->dma_tx);
}
- host->dma_rx = dma_request_channel(mask, NULL, host);
- if (!host->dma_rx) {
+ host->dma_rx = dma_request_chan(mmc_dev(host->mmc), "rx");
I suspect this breaks on jz4740... Did you test?
+ if (IS_ERR(host->dma_rx)) {
dev_err(mmc_dev(host->mmc), "Failed to get dma_rx channel\n");
- goto free_master_write;
+ dma_release_channel(host->dma_tx);
+ return PTR_ERR(host->dma_rx);
}
/* Initialize DMA pre request cookie */
host->next_data.cookie = 1;
return 0;
-
-free_master_write:
- dma_release_channel(host->dma_tx);
- return -ENODEV;
}
static inline struct dma_chan *jz4740_mmc_get_dma_chan(struct
jz4740_mmc_host *host,
--
2.16.2
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