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authorShawn Lin <shawn.lin@rock-chips.com>2016-03-31 11:11:41 +0800
committerMark Brown <broonie@kernel.org>2016-03-31 12:06:19 -0700
commite4c0e06f949b9493cafe952c3029576b47c2a7c4 (patch)
treeb30d4fb514c2cd64f98edda74925d83feb65fda2 /drivers/spi
parentbb51537aa825e98b970c784f802e7e09f29df3ba (diff)
downloadlinux-e4c0e06f949b9493cafe952c3029576b47c2a7c4.tar.bz2
spi: rockchip: fix probe deferral handling
Use dma_request_chan instead of dma_request_slave_channel, in this case we can check EPROBE_DEFER without static warning. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-rockchip.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index bfeb0d4c7ee0..9713b811a2cd 100644
--- a/drivers/spi/spi-rockchip.c
+++ b/drivers/spi/spi-rockchip.c
@@ -723,23 +723,27 @@ static int rockchip_spi_probe(struct platform_device *pdev)
master->transfer_one = rockchip_spi_transfer_one;
master->handle_err = rockchip_spi_handle_err;
- rs->dma_tx.ch = dma_request_slave_channel(rs->dev, "tx");
- if (IS_ERR_OR_NULL(rs->dma_tx.ch)) {
+ rs->dma_tx.ch = dma_request_chan(rs->dev, "tx");
+ if (IS_ERR(rs->dma_tx.ch)) {
/* Check tx to see if we need defer probing driver */
if (PTR_ERR(rs->dma_tx.ch) == -EPROBE_DEFER) {
ret = -EPROBE_DEFER;
goto err_get_fifo_len;
}
dev_warn(rs->dev, "Failed to request TX DMA channel\n");
+ rs->dma_tx.ch = NULL;
}
- rs->dma_rx.ch = dma_request_slave_channel(rs->dev, "rx");
- if (!rs->dma_rx.ch) {
- if (rs->dma_tx.ch) {
+ rs->dma_rx.ch = dma_request_chan(rs->dev, "rx");
+ if (IS_ERR(rs->dma_rx.ch)) {
+ if (PTR_ERR(rs->dma_rx.ch) == -EPROBE_DEFER) {
dma_release_channel(rs->dma_tx.ch);
rs->dma_tx.ch = NULL;
+ ret = -EPROBE_DEFER;
+ goto err_get_fifo_len;
}
dev_warn(rs->dev, "Failed to request RX DMA channel\n");
+ rs->dma_rx.ch = NULL;
}
if (rs->dma_tx.ch && rs->dma_rx.ch) {