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spi: tegra: checking for ERR_PTR instead of NULL 

dma_request_slave_channel() returns NULL on error and not ERR_PTRs.
I've fixed this by using dma_request_slave_channel_reason() which does
return ERR_PTRs.

Fixes: a915d150f6 ('spi: tegra: convert to standard DMA DT bindings')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Dan Carpenter 2013-12-16 17:02:10 +03:00 committed by Stephen Warren
parent f1d6ff7939
commit 8a0a1af30c
1 changed files with 2 additions and 2 deletions
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4
drivers/spi/spi-tegra20-slink.c
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@ -630,8 +630,8 @@ static int tegra_slink_init_dma_param(struct tegra_slink_data *tspi,
int ret;
struct dma_slave_config dma_sconfig;
dma_chan = dma_request_slave_channel(tspi->dev,
dma_to_memory ? "rx" : "tx");
dma_chan = dma_request_slave_channel_reason(tspi->dev,
dma_to_memory ? "rx" : "tx");
if (IS_ERR(dma_chan)) {
ret = PTR_ERR(dma_chan);
if (ret != -EPROBE_DEFER)