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authorPeter Ujfalusi <peter.ujfalusi@ti.com>2020-01-09 10:31:46 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-01-14 21:46:47 +0100
commit7b73a9c8e26ce5769c41d4b787767c10fe7269db (patch)
tree3102c08d12e5f94678e98ac0c80ac76f32f0cf4f
parent884a90bdf42bf15b1d07b88b72d93c955eb19ad9 (diff)
slimbus: qcom-ngd-ctrl: 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> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200109103148.5612-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/slimbus/qcom-ngd-ctrl.c20
1 files changed, 12 insertions, 8 deletions
diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c
index 29fbab55c3b3..e3f5ebc0c05e 100644
--- a/drivers/slimbus/qcom-ngd-ctrl.c
+++ b/drivers/slimbus/qcom-ngd-ctrl.c
@@ -666,10 +666,12 @@ static int qcom_slim_ngd_init_rx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
struct device *dev = ctrl->dev;
int ret, size;
- ctrl->dma_rx_channel = dma_request_slave_channel(dev, "rx");
- if (!ctrl->dma_rx_channel) {
- dev_err(dev, "Failed to request dma channels");
- return -EINVAL;
+ ctrl->dma_rx_channel = dma_request_chan(dev, "rx");
+ if (IS_ERR(ctrl->dma_rx_channel)) {
+ dev_err(dev, "Failed to request RX dma channel");
+ ret = PTR_ERR(ctrl->dma_rx_channel);
+ ctrl->dma_rx_channel = NULL;
+ return ret;
}
size = QCOM_SLIM_NGD_DESC_NUM * SLIM_MSGQ_BUF_LEN;
@@ -703,10 +705,12 @@ static int qcom_slim_ngd_init_tx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
int ret = 0;
int size;
- ctrl->dma_tx_channel = dma_request_slave_channel(dev, "tx");
- if (!ctrl->dma_tx_channel) {
- dev_err(dev, "Failed to request dma channels");
- return -EINVAL;
+ ctrl->dma_tx_channel = dma_request_chan(dev, "tx");
+ if (IS_ERR(ctrl->dma_tx_channel)) {
+ dev_err(dev, "Failed to request TX dma channel");
+ ret = PTR_ERR(ctrl->dma_tx_channel);
+ ctrl->dma_tx_channel = NULL;
+ return ret;
}
size = ((QCOM_SLIM_NGD_DESC_NUM + 1) * SLIM_MSGQ_BUF_LEN);