From: Marek Vasut <marek.vasut@gmail.com>
To: linux-pci@vger.kernel.org
Cc: Marek Vasut <marek.vasut+renesas@gmail.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Phil Edworthy <phil.edworthy@renesas.com>,
Simon Horman <horms+renesas@verge.net.au>,
Wolfram Sang <wsa@the-dreams.de>,
linux-renesas-soc@vger.kernel.org
Subject: [PATCH 2/4] PCI: rcar: Pull bus clock enable/disable from rcar_pcie_get_resources()
Date: Mon, 21 May 2018 15:11:21 +0200 [thread overview]
Message-ID: <20180521131123.2009-2-marek.vasut+renesas@gmail.com> (raw)
In-Reply-To: <20180521131123.2009-1-marek.vasut+renesas@gmail.com>
The rcar_pcie_get_resources() is another misnomer with a side effect.
The function does not only get resources, but also enables/disables bus
clock. This is forgotten in the probe() function though and if anything
in probe() fails after rcar_pcie_get_resources() is called, the bus
clock are never disabled.
This patch pulls the clock handling out of the rcar_pcie_get_resources()
and enables clock after all the resources were requested. Moreover, this
patch also always disables the clock in case of failure.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Phil Edworthy <phil.edworthy@renesas.com>
Cc: Simon Horman <horms+renesas@verge.net.au>
Cc: Wolfram Sang <wsa@the-dreams.de>
Cc: linux-renesas-soc@vger.kernel.org
---
drivers/pci/host/pcie-rcar.c | 31 +++++++++++++++----------------
1 file changed, 15 insertions(+), 16 deletions(-)
diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c
index dbc80e457f95..eac4b71d9c60 100644
--- a/drivers/pci/host/pcie-rcar.c
+++ b/drivers/pci/host/pcie-rcar.c
@@ -919,32 +919,22 @@ static int rcar_pcie_get_resources(struct rcar_pcie *pcie)
dev_err(dev, "cannot get pcie bus clock\n");
return PTR_ERR(pcie->bus_clk);
}
- err = clk_prepare_enable(pcie->bus_clk);
- if (err)
- return err;
i = irq_of_parse_and_map(dev->of_node, 0);
if (!i) {
dev_err(dev, "cannot get platform resources for msi interrupt\n");
- err = -ENOENT;
- goto err_map_reg;
+ return -ENOENT;
}
pcie->msi.irq1 = i;
i = irq_of_parse_and_map(dev->of_node, 1);
if (!i) {
dev_err(dev, "cannot get platform resources for msi interrupt\n");
- err = -ENOENT;
- goto err_map_reg;
+ return -ENOENT;
}
pcie->msi.irq2 = i;
return 0;
-
-err_map_reg:
- clk_disable_unprepare(pcie->bus_clk);
-
- return err;
}
static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie,
@@ -1125,9 +1115,15 @@ static int rcar_pcie_probe(struct platform_device *pdev)
goto err_pm_put;
}
+ err = clk_prepare_enable(pcie->bus_clk);
+ if (err) {
+ dev_err(dev, "failed to enable bus clock: %d\n", err);
+ goto err_pm_put;
+ }
+
err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node);
if (err)
- goto err_pm_put;
+ goto err_clk_disable;
/* Failure to get a link might just be that no cards are inserted */
hw_init_fn = of_device_get_match_data(dev);
@@ -1135,7 +1131,7 @@ static int rcar_pcie_probe(struct platform_device *pdev)
if (err) {
dev_info(dev, "PCIe link down\n");
err = -ENODEV;
- goto err_pm_put;
+ goto err_clk_disable;
}
data = rcar_pci_read_reg(pcie, MACSR);
@@ -1147,16 +1143,19 @@ static int rcar_pcie_probe(struct platform_device *pdev)
dev_err(dev,
"failed to enable MSI support: %d\n",
err);
- goto err_pm_put;
+ goto err_clk_disable;
}
}
err = rcar_pcie_enable(pcie);
if (err)
- goto err_pm_put;
+ goto err_clk_disable;
return 0;
+err_clk_disable:
+ clk_disable_unprepare(pcie->bus_clk);
+
err_pm_put:
pm_runtime_put(dev);
--
2.16.2
next prev parent reply other threads:[~2018-05-21 13:11 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-21 13:11 [PATCH 1/4] PCI: rcar: Rename rcar_pcie_parse_request_of_pci_ranges() Marek Vasut
2018-05-21 13:11 ` Marek Vasut [this message]
2018-05-22 9:13 ` [PATCH 2/4] PCI: rcar: Pull bus clock enable/disable from rcar_pcie_get_resources() Simon Horman
2018-05-22 15:11 ` Geert Uytterhoeven
2018-05-21 13:11 ` [PATCH 3/4] PCI: rcar: Add missing irq_dispose_mapping() into failpath Marek Vasut
2018-05-22 9:14 ` Simon Horman
2018-05-22 15:18 ` Geert Uytterhoeven
2018-05-22 21:51 ` Marek Vasut
2018-05-21 13:11 ` [PATCH 4/4] PCI: rcar: Teardown MSI setup if rcar_pcie_enable() fails Marek Vasut
2018-05-22 9:16 ` Simon Horman
2018-05-22 18:36 ` Geert Uytterhoeven
2018-05-22 21:53 ` Marek Vasut
2018-05-23 6:18 ` Geert Uytterhoeven
2018-05-23 10:38 ` Marek Vasut
2018-05-22 9:12 ` [PATCH 1/4] PCI: rcar: Rename rcar_pcie_parse_request_of_pci_ranges() Simon Horman
2018-05-22 10:53 ` Geert Uytterhoeven
2018-05-23 16:17 ` Lorenzo Pieralisi
2018-05-23 17:05 ` Marek Vasut
2018-05-23 21:56 ` Bjorn Helgaas
2018-05-24 7:24 ` Marek Vasut
2018-05-24 13:50 ` Lorenzo Pieralisi
2018-05-24 14:36 ` Marek Vasut
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