linux-kernel - [PATCH] pwm: silently error on EPROBE

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Message-Id: <20170523160503.16920-1-jbrunet@baylibre.com>
Date:   Tue, 23 May 2017 18:05:03 +0200
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Thierry Reding <thierry.reding@...il.com>
Cc:     Jerome Brunet <jbrunet@...libre.com>, linux-pwm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-amlogic@...ts.infradead.org
Subject: [PATCH] pwm: silently error on EPROBE_DEFER

In of_pwm_chip, if we fail to get the pwm chip due to probe defer, we
shouldn't print an error message. Just be silent in this case.

Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
---
 drivers/pwm/core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index a0860b30bd93..1581f6ab1b1f 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -678,7 +678,9 @@ struct pwm_device *of_pwm_get(struct device_node *np, const char *con_id)
 
 	pc = of_node_to_pwmchip(args.np);
 	if (IS_ERR(pc)) {
-		pr_err("%s(): PWM chip not found\n", __func__);
+		if (PTR_ERR(pc) != -EPROBE_DEFER)
+			pr_err("%s(): PWM chip not found\n", __func__);
+
 		pwm = ERR_CAST(pc);
 		goto put;
 	}
-- 
2.9.4