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Subject[PATCH 03/10] serial: 8250_bcm7271: Propagate error codes from brcmuart_probe()
Date
In case of failures brcmuart_probe() always returned -ENODEV, this
isn't correct for example platform_get_irq_byname() may return
-EPROBE_DEFER to handle such cases propagate error codes in
brcmuart_probe() in case of failures.

Fixes: 41a469482de25 ("serial: 8250: Add new 8250-core based Broadcom STB driver")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
drivers/tty/serial/8250/8250_bcm7271.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_bcm7271.c b/drivers/tty/serial/8250/8250_bcm7271.c
index 7ecfcc650d28..cc60a7874e8b 100644
--- a/drivers/tty/serial/8250/8250_bcm7271.c
+++ b/drivers/tty/serial/8250/8250_bcm7271.c
@@ -1074,14 +1074,18 @@ static int brcmuart_probe(struct platform_device *pdev)
priv->rx_bufs = dma_alloc_coherent(dev,
priv->rx_size,
&priv->rx_addr, GFP_KERNEL);
- if (!priv->rx_bufs)
+ if (!priv->rx_bufs) {
+ ret = -EINVAL;
goto err;
+ }
priv->tx_size = UART_XMIT_SIZE;
priv->tx_buf = dma_alloc_coherent(dev,
priv->tx_size,
&priv->tx_addr, GFP_KERNEL);
- if (!priv->tx_buf)
+ if (!priv->tx_buf) {
+ ret = -EINVAL;
goto err;
+ }
}

ret = serial8250_register_8250_port(&up);
@@ -1095,6 +1099,7 @@ static int brcmuart_probe(struct platform_device *pdev)
if (priv->dma_enabled) {
dma_irq = platform_get_irq_byname(pdev, "dma");
if (dma_irq < 0) {
+ ret = dma_irq;
dev_err(dev, "no IRQ resource info\n");
goto err1;
}
@@ -1114,7 +1119,7 @@ static int brcmuart_probe(struct platform_device *pdev)
err:
brcmuart_free_bufs(dev, priv);
brcmuart_arbitration(priv, 0);
- return -ENODEV;
+ return ret;
}

static int brcmuart_remove(struct platform_device *pdev)
--
2.17.1
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