diff options
| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2020-02-27 14:37:49 +0200 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2020-03-11 16:17:54 +0100 |
| commit | b35f79aa461e965514e7d437c6704679552f4818 (patch) | |
| tree | 953ae0cf9935099336f2384b00d3496799f24ecd /drivers/mtd | |
| parent | 92f0f8efbd4ad8fac2e3e902eff3c67da65f08cc (diff) | |
mtd: rawnand: stm32_fmc2: 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.
Use using dma_request_chan() directly and inform user of error in case the
DMA request failed.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200227123749.24064-8-peter.ujfalusi@ti.com
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/raw/stm32_fmc2_nand.c | 44 |
1 files changed, 37 insertions, 7 deletions
diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c b/drivers/mtd/nand/raw/stm32_fmc2_nand.c index 3ba73f18841f..b6d45cd911ae 100644 --- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c +++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c @@ -1606,15 +1606,36 @@ static int stm32_fmc2_setup_interface(struct nand_chip *chip, int chipnr, /* DMA configuration */ static int stm32_fmc2_dma_setup(struct stm32_fmc2_nfc *fmc2) { - int ret; + int ret = 0; - fmc2->dma_tx_ch = dma_request_slave_channel(fmc2->dev, "tx"); - fmc2->dma_rx_ch = dma_request_slave_channel(fmc2->dev, "rx"); - fmc2->dma_ecc_ch = dma_request_slave_channel(fmc2->dev, "ecc"); + fmc2->dma_tx_ch = dma_request_chan(fmc2->dev, "tx"); + if (IS_ERR(fmc2->dma_tx_ch)) { + ret = PTR_ERR(fmc2->dma_tx_ch); + if (ret != -ENODEV) + dev_err(fmc2->dev, + "failed to request tx DMA channel: %d\n", ret); + fmc2->dma_tx_ch = NULL; + goto err_dma; + } - if (!fmc2->dma_tx_ch || !fmc2->dma_rx_ch || !fmc2->dma_ecc_ch) { - dev_warn(fmc2->dev, "DMAs not defined in the device tree, polling mode is used\n"); - return 0; + fmc2->dma_rx_ch = dma_request_chan(fmc2->dev, "rx"); + if (IS_ERR(fmc2->dma_rx_ch)) { + ret = PTR_ERR(fmc2->dma_rx_ch); + if (ret != -ENODEV) + dev_err(fmc2->dev, + "failed to request rx DMA channel: %d\n", ret); + fmc2->dma_rx_ch = NULL; + goto err_dma; + } + + fmc2->dma_ecc_ch = dma_request_chan(fmc2->dev, "ecc"); + if (IS_ERR(fmc2->dma_ecc_ch)) { + ret = PTR_ERR(fmc2->dma_ecc_ch); + if (ret != -ENODEV) + dev_err(fmc2->dev, + "failed to request ecc DMA channel: %d\n", ret); + fmc2->dma_ecc_ch = NULL; + goto err_dma; } ret = sg_alloc_table(&fmc2->dma_ecc_sg, FMC2_MAX_SG, GFP_KERNEL); @@ -1635,6 +1656,15 @@ static int stm32_fmc2_dma_setup(struct stm32_fmc2_nfc *fmc2) init_completion(&fmc2->dma_ecc_complete); return 0; + +err_dma: + if (ret == -ENODEV) { + dev_warn(fmc2->dev, + "DMAs not defined in the DT, polling mode is used\n"); + ret = 0; + } + + return ret; } /* NAND callbacks setup */ |