linux-kernel - [PATCH] gpio: omap: handle deferred probe with dev_err_probe() for gpiochip_add

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Date:   Wed, 18 Nov 2020 16:31:49 +0200
From:   Grygorii Strashko <grygorii.strashko@...com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
CC:     <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-omap@...r.kernel.org>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Grygorii Strashko <grygorii.strashko@...com>
Subject: [PATCH] gpio: omap: handle deferred probe with dev_err_probe() for gpiochip_add_data()

The gpiochip_add_data() may return -EPROBE_DEFER which is not handled
properly by TI GPIO driver and causes unnecessary boot log messages.

Hence, add proper deferred probe handling with new dev_err_probe() API.

Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
---
 drivers/gpio/gpio-omap.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index f7ceb2b11afc..41952bb818ad 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -1049,11 +1049,8 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
 	irq->first = irq_base;
 
 	ret = gpiochip_add_data(&bank->chip, bank);
-	if (ret) {
-		dev_err(bank->chip.parent,
-			"Could not register gpio chip %d\n", ret);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(bank->chip.parent, ret, "Could not register gpio chip\n");
 
 	ret = devm_request_irq(bank->chip.parent, bank->irq,
 			       omap_gpio_irq_handler,
-- 
2.17.1