Some functions called by serial_imx_probe emit an error message themself
(like kmalloc() and friends). clk_prepare_enable() and
devm_request_irq() however don't which might make the driver silently
fail to probe. So add an error message for these.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
---
Changes since (implict) v1, sent with Message-Id:
1473326796-15719-1-git-send-email-u.kleine-koenig@xxxxxxxxxxxxxx:
- adapt commit log because not only failed devm_request_irq got a message.
drivers/tty/serial/imx.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 782b0e524e14..5240f9c080c3 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -2137,8 +2137,10 @@ static int serial_imx_probe(struct platform_device *pdev)
/* For register access, we only need to enable the ipg clock. */
ret = clk_prepare_enable(sport->clk_ipg);
- if (ret)
+ if (ret) {
+ dev_err(&pdev->dev, "failed to enable per clk: %d\n", ret);
return ret;
+ }
/* Disable interrupts before requesting them */
reg = readl_relaxed(sport->port.membase + UCR1);
@@ -2155,18 +2157,26 @@ static int serial_imx_probe(struct platform_device *pdev)
if (txirq > 0) {
ret = devm_request_irq(&pdev->dev, rxirq, imx_rxint, 0,
dev_name(&pdev->dev), sport);
- if (ret)
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request rx irq: %d\n",
+ ret);
return ret;
+ }
ret = devm_request_irq(&pdev->dev, txirq, imx_txint, 0,
dev_name(&pdev->dev), sport);
- if (ret)
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request tx irq: %d\n",
+ ret);
return ret;
+ }
} else {
ret = devm_request_irq(&pdev->dev, rxirq, imx_int, 0,
dev_name(&pdev->dev), sport);
- if (ret)
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request irq: %d\n", ret);
return ret;
+ }
}
imx_ports[sport->port.line] = sport;
--
2.8.1
--
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