Messages in this thread Patch in this message | | | From | Nicolas Ferre <> | Subject | [PATCH] backlight: pwm: handle EPROBE_DEFER while requesting the PWM | Date | Thu, 19 Feb 2015 10:30:14 +0100 |
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When trying to request the PWM device with devm_pwm_get(), the EPROBE_DEFER flag is not handled properly. It can lead to the PWM not being found.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> --- drivers/video/backlight/pwm_bl.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 3a145a643e0d..6897f1c1bc73 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -274,6 +274,10 @@ static int pwm_backlight_probe(struct platform_device *pdev) pb->pwm = devm_pwm_get(&pdev->dev, NULL); if (IS_ERR(pb->pwm)) { + ret = PTR_ERR(pb->pwm); + if (ret == -EPROBE_DEFER) + goto err_alloc; + dev_err(&pdev->dev, "unable to request PWM, trying legacy API\n"); pb->legacy = true; pb->pwm = pwm_request(data->pwm_id, "pwm-backlight"); -- 2.1.3
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