linux-kernel - [PATCH AUTOSEL 4.19 29/37] i2c: gpio: suppress error on probe defer

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Message-Id: <20200318205509.17053-29-sashal@kernel.org>
Date:   Wed, 18 Mar 2020 16:55:01 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Hamish Martin <hamish.martin@...iedtelesis.co.nz>,
        Linus Walleij <linus.walleij@...aro.org>,
        Wolfram Sang <wsa@...-dreams.de>,
        Sasha Levin <sashal@...nel.org>, linux-i2c@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 29/37] i2c: gpio: suppress error on probe defer

From: Hamish Martin <hamish.martin@...iedtelesis.co.nz>

[ Upstream commit 3747cd2efe7ecb9604972285ab3f60c96cb753a8 ]

If a GPIO we are trying to use is not available and we are deferring
the probe, don't output an error message.
This seems to have been the intent of commit 05c74778858d
("i2c: gpio: Add support for named gpios in DT") but the error was
still output due to not checking the updated 'retdesc'.

Fixes: 05c74778858d ("i2c: gpio: Add support for named gpios in DT")
Signed-off-by: Hamish Martin <hamish.martin@...iedtelesis.co.nz>
Acked-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Wolfram Sang <wsa@...-dreams.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/i2c/busses/i2c-gpio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-gpio.c b/drivers/i2c/busses/i2c-gpio.c
index c008d209f0b83..87014d144ccdc 100644
--- a/drivers/i2c/busses/i2c-gpio.c
+++ b/drivers/i2c/busses/i2c-gpio.c
@@ -248,7 +248,7 @@ static struct gpio_desc *i2c_gpio_get_desc(struct device *dev,
 	if (ret == -ENOENT)
 		retdesc = ERR_PTR(-EPROBE_DEFER);
 
-	if (ret != -EPROBE_DEFER)
+	if (PTR_ERR(retdesc) != -EPROBE_DEFER)
 		dev_err(dev, "error trying to get descriptor: %d\n", ret);
 
 	return retdesc;
-- 
2.20.1