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-rw-r--r--drivers/tty/serial/stm32-usart.c47
1 files changed, 23 insertions, 24 deletions
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index 24def72b2565..a1490033aa16 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -1680,22 +1680,10 @@ static int stm32_usart_serial_probe(struct platform_device *pdev)
if (!stm32port->info)
return -EINVAL;
- ret = stm32_usart_init_port(stm32port, pdev);
- if (ret)
- return ret;
-
- if (stm32port->wakeup_src) {
- device_set_wakeup_capable(&pdev->dev, true);
- ret = dev_pm_set_wake_irq(&pdev->dev, stm32port->port.irq);
- if (ret)
- goto err_deinit_port;
- }
-
stm32port->rx_ch = dma_request_chan(&pdev->dev, "rx");
- if (PTR_ERR(stm32port->rx_ch) == -EPROBE_DEFER) {
- ret = -EPROBE_DEFER;
- goto err_wakeirq;
- }
+ if (PTR_ERR(stm32port->rx_ch) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
/* Fall back in interrupt mode for any non-deferral error */
if (IS_ERR(stm32port->rx_ch))
stm32port->rx_ch = NULL;
@@ -1709,6 +1697,17 @@ static int stm32_usart_serial_probe(struct platform_device *pdev)
if (IS_ERR(stm32port->tx_ch))
stm32port->tx_ch = NULL;
+ ret = stm32_usart_init_port(stm32port, pdev);
+ if (ret)
+ goto err_dma_tx;
+
+ if (stm32port->wakeup_src) {
+ device_set_wakeup_capable(&pdev->dev, true);
+ ret = dev_pm_set_wake_irq(&pdev->dev, stm32port->port.irq);
+ if (ret)
+ goto err_deinit_port;
+ }
+
if (stm32port->rx_ch && stm32_usart_of_dma_rx_probe(stm32port, pdev)) {
/* Fall back in interrupt mode */
dma_release_channel(stm32port->rx_ch);
@@ -1745,19 +1744,11 @@ err_port:
pm_runtime_set_suspended(&pdev->dev);
pm_runtime_put_noidle(&pdev->dev);
- if (stm32port->tx_ch) {
+ if (stm32port->tx_ch)
stm32_usart_of_dma_tx_remove(stm32port, pdev);
- dma_release_channel(stm32port->tx_ch);
- }
-
if (stm32port->rx_ch)
stm32_usart_of_dma_rx_remove(stm32port, pdev);
-err_dma_rx:
- if (stm32port->rx_ch)
- dma_release_channel(stm32port->rx_ch);
-
-err_wakeirq:
if (stm32port->wakeup_src)
dev_pm_clear_wake_irq(&pdev->dev);
@@ -1767,6 +1758,14 @@ err_deinit_port:
stm32_usart_deinit_port(stm32port);
+err_dma_tx:
+ if (stm32port->tx_ch)
+ dma_release_channel(stm32port->tx_ch);
+
+err_dma_rx:
+ if (stm32port->rx_ch)
+ dma_release_channel(stm32port->rx_ch);
+
return ret;
}