PM / devfreq: tegra: fix error return code in tegra_devfreq_probe()

platform_get_irq() returns an error code, but the tegra-devfreq
driver ignores it and always returns -ENODEV. This is not correct,
and prevents -EPROBE_DEFER from being propagated properly.

Notice that platform_get_irq() no longer returns 0 on error:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af

Print and propagate the return value of platform_get_irq on failure.

Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

diff --git a/drivers/devfreq/tegra-devfreq.c b/drivers/devfreq/tegra-devfreq.c
index 214fff96fa4a6c23d92b71eb1528348e2025afb8..ae712159246fbe2b66895d56f05da9d75fdcd00d 100644 (file)
--- a/drivers/devfreq/tegra-devfreq.c
+++ b/drivers/devfreq/tegra-devfreq.c
@@ -688,9 +688,9 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
        }
 
        irq = platform_get_irq(pdev, 0);
-       if (irq <= 0) {
-               dev_err(&pdev->dev, "Failed to get IRQ\n");
-               return -ENODEV;
+       if (irq < 0) {
+               dev_err(&pdev->dev, "Failed to get IRQ: %d\n", irq);
+               return irq;
        }
 
        platform_set_drvdata(pdev, tegra);