linux-kernel - [PATCH v2] pinctrl: qcom: remove gpiochip in failure cases

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Date:	Fri, 29 Aug 2014 13:41:48 +0530
From:	Pramod Gurav <pramod.gurav@...rtplayin.com>
To:	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Cc:	Pramod Gurav <pramod.gurav@...rtplayin.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bjorn Andersson <bjorn.andersson@...ymobile.com>,
	"Ivan T. Ivanov" <iivanov@...sol.com>
Subject: [PATCH v2] pinctrl: qcom: remove gpiochip in failure cases

This patch releases gpiochip related resources by calling
gpiochip_remove when either of gpiochip_add_pin_range and
gpiochip_irqchip_add fails.

CC: Linus Walleij <linus.walleij@...aro.org>
CC: Bjorn Andersson <bjorn.andersson@...ymobile.com>
CC: "Ivan T. Ivanov" <iivanov@...sol.com>
Signed-off-by: Pramod Gurav <pramod.gurav@...rtplayin.com>
---

Changes since v1:
- In v1 of this patch gpiochip_remove was called only in failure case of
  gpiochip_irqchip_add. This patchs adds a call to gpiochip_remove in failure
  case of gpiochip_add_pin_range as well.

 drivers/pinctrl/qcom/pinctrl-msm.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
index 2738108..9175bbc 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -829,6 +829,7 @@ static int msm_gpio_init(struct msm_pinctrl *pctrl)
 	ret = gpiochip_add_pin_range(&pctrl->chip, dev_name(pctrl->dev), 0, 0, chip->ngpio);
 	if (ret) {
 		dev_err(pctrl->dev, "Failed to add pin range\n");
+		gpiochip_remove(&pctrl->chip);
 		return ret;
 	}
 
@@ -839,6 +840,7 @@ static int msm_gpio_init(struct msm_pinctrl *pctrl)
 				   IRQ_TYPE_NONE);
 	if (ret) {
 		dev_err(pctrl->dev, "Failed to add irqchip to gpiochip\n");
+		gpiochip_remove(&pctrl->chip);
 		return -ENOSYS;
 	}
 
-- 
1.7.0.4

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