linux-kernel - [PATCH v2] pinctrl: ralink: pinctrl-rt2880: avoid to error in calls if pin is already enabled

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Date:   Fri,  4 Jun 2021 07:55:36 +0200
From:   Sergio Paracuellos <sergio.paracuellos@...il.com>
To:     linus.walleij@...aro.org
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] pinctrl: ralink: pinctrl-rt2880: avoid to error in calls if pin is already enabled

In 'rt2880_pmx_group_enable' driver is printing an error and returning
-EBUSY if a pin has been already enabled. This becomes in anoying messages
in the caller when this happens like the following:

rt2880-pinmux pinctrl: pcie is already enabled
mt7621-pci 1e140000.pcie: Error applying setting, reverse things back

To avoid this just print the already enabled message in the pinctrl
driver and return 0 instead to don't confuse the user with a real
bad problem.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@...il.com>
---
Changes in v2:
    - Fix commit message s/is/if

 drivers/pinctrl/ralink/pinctrl-rt2880.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/ralink/pinctrl-rt2880.c b/drivers/pinctrl/ralink/pinctrl-rt2880.c
index 1f4bca854add..a9b511c7e850 100644
--- a/drivers/pinctrl/ralink/pinctrl-rt2880.c
+++ b/drivers/pinctrl/ralink/pinctrl-rt2880.c
@@ -127,7 +127,7 @@ static int rt2880_pmx_group_enable(struct pinctrl_dev *pctrldev,
 	if (p->groups[group].enabled) {
 		dev_err(p->dev, "%s is already enabled\n",
 			p->groups[group].name);
-		return -EBUSY;
+		return 0;
 	}
 
 	p->groups[group].enabled = 1;
-- 
2.25.1