From 1e512d45332bb3a2e97ca262101d43adca274bb2 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Thu, 8 Sep 2016 14:27:53 +0200 Subject: [PATCH] serial: imx: add error messages when .probe fails MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Greg Kroah-Hartman --- 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;