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| author | Nicolas Ferre <nicolas.ferre@atmel.com> | 2015-02-19 10:30:14 +0100 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2015-05-26 08:44:59 +0100 |
| commit | 68feaca0b13e453aa14ee064c1736202b48b342f (patch) | |
| tree | 14a9289678430eebe4c6bfb33bcdd6f39b440083 /drivers/video/backlight/pwm_bl.c | |
| parent | b787f68c36d49bb1d9236f403813641efa74a031 (diff) | |
| download | lwn-68feaca0b13e453aa14ee064c1736202b48b342f.tar.gz lwn-68feaca0b13e453aa14ee064c1736202b48b342f.zip | |
backlight: pwm: Handle EPROBE_DEFER while requesting the PWM
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>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/video/backlight/pwm_bl.c')
| -rw-r--r-- | drivers/video/backlight/pwm_bl.c | 4 |
1 files changed, 4 insertions, 0 deletions
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"); |