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From: Kangjie Lu <kjlu@umn.edu>
To: kjlu@umn.edu
Cc: pakki001@umn.edu, Jingoo Han <jingoohan1@gmail.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Kukjin Kim <kgene@kernel.org>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] pci: dwc: add a check for resetting gpio
Date: Tue, 25 Dec 2018 20:22:36 -0600	[thread overview]
Message-ID: <20181226022236.71682-1-kjlu@umn.edu> (raw)

devm_gpio_request_one() could fail. The fix checks its status and issues
an error if it fails.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
---
 drivers/pci/controller/dwc/pci-exynos.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c
index cee5f2f590e2..e3a045e215d2 100644
--- a/drivers/pci/controller/dwc/pci-exynos.c
+++ b/drivers/pci/controller/dwc/pci-exynos.c
@@ -226,9 +226,12 @@ static void exynos_pcie_assert_reset(struct exynos_pcie *ep)
 	struct dw_pcie *pci = ep->pci;
 	struct device *dev = pci->dev;
 
-	if (ep->reset_gpio >= 0)
-		devm_gpio_request_one(dev, ep->reset_gpio,
-				GPIOF_OUT_INIT_HIGH, "RESET");
+	if (ep->reset_gpio >= 0) {
+		if (devm_gpio_request_one(dev, ep->reset_gpio,
+				GPIOF_OUT_INIT_HIGH, "RESET"))
+			dev_err(dev, "Failed requesting reset gpio %d\n",
+					ep->reset_gpio);
+	}
 }
 
 static int exynos_pcie_establish_link(struct exynos_pcie *ep)
-- 
2.17.2 (Apple Git-113)


WARNING: multiple messages have this Message-ID (diff)
From: Kangjie Lu <kjlu@umn.edu>
To: kjlu@umn.edu
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Jingoo Han <jingoohan1@gmail.com>,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	Krzysztof Kozlowski <krzk@kernel.org>,
	linux-samsung-soc@vger.kernel.org, Kukjin Kim <kgene@kernel.org>,
	pakki001@umn.edu, Bjorn Helgaas <bhelgaas@google.com>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH] pci: dwc: add a check for resetting gpio
Date: Tue, 25 Dec 2018 20:22:36 -0600	[thread overview]
Message-ID: <20181226022236.71682-1-kjlu@umn.edu> (raw)

devm_gpio_request_one() could fail. The fix checks its status and issues
an error if it fails.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
---
 drivers/pci/controller/dwc/pci-exynos.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c
index cee5f2f590e2..e3a045e215d2 100644
--- a/drivers/pci/controller/dwc/pci-exynos.c
+++ b/drivers/pci/controller/dwc/pci-exynos.c
@@ -226,9 +226,12 @@ static void exynos_pcie_assert_reset(struct exynos_pcie *ep)
 	struct dw_pcie *pci = ep->pci;
 	struct device *dev = pci->dev;
 
-	if (ep->reset_gpio >= 0)
-		devm_gpio_request_one(dev, ep->reset_gpio,
-				GPIOF_OUT_INIT_HIGH, "RESET");
+	if (ep->reset_gpio >= 0) {
+		if (devm_gpio_request_one(dev, ep->reset_gpio,
+				GPIOF_OUT_INIT_HIGH, "RESET"))
+			dev_err(dev, "Failed requesting reset gpio %d\n",
+					ep->reset_gpio);
+	}
 }
 
 static int exynos_pcie_establish_link(struct exynos_pcie *ep)
-- 
2.17.2 (Apple Git-113)


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             reply	other threads:[~2018-12-26  2:23 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-26  2:22 Kangjie Lu [this message]
2018-12-26  2:22 ` [PATCH] pci: dwc: add a check for resetting gpio Kangjie Lu
2018-12-31 20:40 ` Bjorn Helgaas
2018-12-31 20:40   ` Bjorn Helgaas

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