[PATCH] PCI: dw-rockchip: Add error messages in .probe()s error paths - Uwe Kleine-König

From: "Uwe Kleine-König" <ukleinek@debian.org>
To: "Lorenzo Pieralisi" <lpieralisi@kernel.org>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Heiko Stuebner" <heiko@sntech.de>,
	"Lei Chuanhua" <lchuanhua@maxlinear.com>,
	"Manivannan Sadhasivam" <manivannan.sadhasivam@linaro.org>,
	"Jesper Nilsson" <jesper.nilsson@axis.com>,
	"Nobuhiro Iwamatsu" <nobuhiro1.iwamatsu@toshiba.co.jp>,
	"Yoshihiro Shimoda" <yoshihiro.shimoda.uh@renesas.com>,
	"Damien Le Moal" <dlemoal@kernel.org>
Cc: Rob Herring <robh@kernel.org>,
	linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org
Subject: [PATCH] PCI: dw-rockchip: Add error messages in .probe()s error paths
Date: Tue, 27 Feb 2024 12:18:35 +0100	[thread overview]
Message-ID: <20240227111837.395422-2-ukleinek@debian.org> (raw)

Drivers that silently fail to probe provide a bad user experience and
make it unnecessarily hard to debug such a failure. Fix it by using
dev_err_probe() instead of a plain return.

Signed-off-by: Uwe Kleine-König <ukleinek@debian.org>
---
 drivers/pci/controller/dwc/pcie-dw-rockchip.c | 23 ++++++++++++-------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-dw-rockchip.c b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
index d6842141d384..4c16d8d2e178 100644
--- a/drivers/pci/controller/dwc/pcie-dw-rockchip.c
+++ b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
@@ -225,11 +225,17 @@ static int rockchip_pcie_clk_init(struct rockchip_pcie *rockchip)
 
 	ret = devm_clk_bulk_get_all(dev, &rockchip->clks);
 	if (ret < 0)
-		return ret;
+		return dev_err_probe(rockchip->pci.dev, ret,
+				     "failed to get clocks\n");
 
 	rockchip->clk_cnt = ret;
 
-	return clk_bulk_prepare_enable(rockchip->clk_cnt, rockchip->clks);
+	ret = clk_bulk_prepare_enable(rockchip->clk_cnt, rockchip->clks);
+	if (ret)
+		return dev_err_probe(rockchip->pci.dev, ret,
+				     "failed to enable clocks\n");
+
+	return 0;
 }
 
 static int rockchip_pcie_resource_get(struct platform_device *pdev,
@@ -237,12 +243,14 @@ static int rockchip_pcie_resource_get(struct platform_device *pdev,
 {
 	rockchip->apb_base = devm_platform_ioremap_resource_byname(pdev, "apb");
 	if (IS_ERR(rockchip->apb_base))
-		return PTR_ERR(rockchip->apb_base);
+		return dev_err_probe(&pdev->dev, PTR_ERR(rockchip->apb_base),
+				     "failed to map apb registers\n");
 
 	rockchip->rst_gpio = devm_gpiod_get_optional(&pdev->dev, "reset",
 						     GPIOD_OUT_HIGH);
 	if (IS_ERR(rockchip->rst_gpio))
-		return PTR_ERR(rockchip->rst_gpio);
+		return dev_err_probe(&pdev->dev, PTR_ERR(rockchip->rst_gpio),
+				     "failed to get reset gpio\n");
 
 	rockchip->rst = devm_reset_control_array_get_exclusive(&pdev->dev);
 	if (IS_ERR(rockchip->rst))
@@ -320,10 +328,9 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
 		rockchip->vpcie3v3 = NULL;
 	} else {
 		ret = regulator_enable(rockchip->vpcie3v3);
-		if (ret) {
-			dev_err(dev, "failed to enable vpcie3v3 regulator\n");
-			return ret;
-		}
+		if (ret)
+			return dev_err_probe(dev, ret,
+					     "failed to enable vpcie3v3 regulator\n");
 	}
 
 	ret = rockchip_pcie_phy_init(rockchip);

base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d
-- 
2.43.0


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