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Groups > linux.kernel > #1654988 > unrolled thread
| Started by | Arvind Yadav <arvind.yadav.cs@gmail.com> |
|---|---|
| First post | 2017-06-01 12:30 +0200 |
| Last post | 2017-06-02 10:40 +0200 |
| Articles | 3 — 3 participants |
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[PATCH] PCI: rockchip: Handle return value of clk_prepare_enable Arvind Yadav <arvind.yadav.cs@gmail.com> - 2017-06-01 12:30 +0200
Re: [PATCH] PCI: rockchip: Handle return value of clk_prepare_enable Shawn Lin <shawn.lin@rock-chips.com> - 2017-06-02 09:30 +0200
Re: [PATCH] PCI: rockchip: Handle return value of clk_prepare_enable Heiko Stuebner <heiko@sntech.de> - 2017-06-02 10:40 +0200
| From | Arvind Yadav <arvind.yadav.cs@gmail.com> |
|---|---|
| Date | 2017-06-01 12:30 +0200 |
| Subject | [PATCH] PCI: rockchip: Handle return value of clk_prepare_enable |
| Message-ID | <tNvwB-1jB-7@gated-at.bofh.it> |
clk_prepare_enable() can fail here and we must check its return value. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> --- drivers/pci/host/pcie-rockchip.c | 34 ++++++++++++++++++++++++++++------ 1 file changed, 28 insertions(+), 6 deletions(-) diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c index 0e020b6..0a248cd 100644 --- a/drivers/pci/host/pcie-rockchip.c +++ b/drivers/pci/host/pcie-rockchip.c @@ -1259,24 +1259,46 @@ static int __maybe_unused rockchip_pcie_resume_noirq(struct device *dev) struct rockchip_pcie *rockchip = dev_get_drvdata(dev); int err; - clk_prepare_enable(rockchip->clk_pcie_pm); - clk_prepare_enable(rockchip->hclk_pcie); - clk_prepare_enable(rockchip->aclk_perf_pcie); - clk_prepare_enable(rockchip->aclk_pcie); + err = clk_prepare_enable(rockchip->clk_pcie_pm); + if (err) + goto err_pcie_pm; + + err = clk_prepare_enable(rockchip->hclk_pcie); + if (err) + goto err_hclk_pcie; + + err = clk_prepare_enable(rockchip->aclk_perf_pcie); + if (err) + goto err_aclk_perf_pcie; + + err = clk_prepare_enable(rockchip->aclk_pcie); + if (err) + goto err_aclk_pcie; err = rockchip_pcie_init_port(rockchip); if (err) - return err; + goto err_pcie_resume; err = rockchip_cfg_atu(rockchip); if (err) - return err; + goto err_pcie_resume; /* Need this to enter L1 again */ rockchip_pcie_update_txcredit_mui(rockchip); rockchip_pcie_enable_interrupts(rockchip); return 0; + +err_pcie_resume: + clk_disable_unprepare(rockchip->aclk_pcie); +err_aclk_pcie: + clk_disable_unprepare(rockchip->aclk_perf_pcie); +err_aclk_perf_pcie: + clk_disable_unprepare(rockchip->hclk_pcie); +err_hclk_pcie: + clk_disable_unprepare(rockchip->clk_pcie_pm); +err_pcie_pm: + return err; } static int rockchip_pcie_probe(struct platform_device *pdev) -- 1.9.1
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| From | Shawn Lin <shawn.lin@rock-chips.com> |
|---|---|
| Date | 2017-06-02 09:30 +0200 |
| Message-ID | <tNPbY-6hW-11@gated-at.bofh.it> |
| In reply to | #1654988 |
Hi, 在 2017/6/1 18:21, Arvind Yadav 写道: > clk_prepare_enable() can fail here and we must check its return value. > > Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Acked-by: Shawn Lin <shawn.lin@rock-chips.com> > --- > drivers/pci/host/pcie-rockchip.c | 34 ++++++++++++++++++++++++++++------ > 1 file changed, 28 insertions(+), 6 deletions(-) > > diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c > index 0e020b6..0a248cd 100644 > --- a/drivers/pci/host/pcie-rockchip.c > +++ b/drivers/pci/host/pcie-rockchip.c > @@ -1259,24 +1259,46 @@ static int __maybe_unused rockchip_pcie_resume_noirq(struct device *dev) > struct rockchip_pcie *rockchip = dev_get_drvdata(dev); > int err; > > - clk_prepare_enable(rockchip->clk_pcie_pm); > - clk_prepare_enable(rockchip->hclk_pcie); > - clk_prepare_enable(rockchip->aclk_perf_pcie); > - clk_prepare_enable(rockchip->aclk_pcie); > + err = clk_prepare_enable(rockchip->clk_pcie_pm); > + if (err) > + goto err_pcie_pm; > + > + err = clk_prepare_enable(rockchip->hclk_pcie); > + if (err) > + goto err_hclk_pcie; > + > + err = clk_prepare_enable(rockchip->aclk_perf_pcie); > + if (err) > + goto err_aclk_perf_pcie; > + > + err = clk_prepare_enable(rockchip->aclk_pcie); > + if (err) > + goto err_aclk_pcie; > > err = rockchip_pcie_init_port(rockchip); > if (err) > - return err; > + goto err_pcie_resume; > > err = rockchip_cfg_atu(rockchip); > if (err) > - return err; > + goto err_pcie_resume; > > /* Need this to enter L1 again */ > rockchip_pcie_update_txcredit_mui(rockchip); > rockchip_pcie_enable_interrupts(rockchip); > > return 0; > + > +err_pcie_resume: > + clk_disable_unprepare(rockchip->aclk_pcie); > +err_aclk_pcie: > + clk_disable_unprepare(rockchip->aclk_perf_pcie); > +err_aclk_perf_pcie: > + clk_disable_unprepare(rockchip->hclk_pcie); > +err_hclk_pcie: > + clk_disable_unprepare(rockchip->clk_pcie_pm); > +err_pcie_pm: > + return err; > } > > static int rockchip_pcie_probe(struct platform_device *pdev) >
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| From | Heiko Stuebner <heiko@sntech.de> |
|---|---|
| Date | 2017-06-02 10:40 +0200 |
| Message-ID | <tNQhH-718-1@gated-at.bofh.it> |
| In reply to | #1654988 |
Am Donnerstag, 1. Juni 2017, 15:51:45 CEST schrieb Arvind Yadav: > clk_prepare_enable() can fail here and we must check its return value. > > Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> looks good, but you may want to include Bjorn Helgaas <bhelgaas@google.com> who is the maintainer of the pci subsystem and would be the one to apply your patch. Aynway, the patch itself looks good to me Reviewed-by: Heiko Stuebner <heiko@sntech.de> Cheers Heiko > --- > drivers/pci/host/pcie-rockchip.c | 34 ++++++++++++++++++++++++++++------ > 1 file changed, 28 insertions(+), 6 deletions(-) > > diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c > index 0e020b6..0a248cd 100644 > --- a/drivers/pci/host/pcie-rockchip.c > +++ b/drivers/pci/host/pcie-rockchip.c > @@ -1259,24 +1259,46 @@ static int __maybe_unused rockchip_pcie_resume_noirq(struct device *dev) > struct rockchip_pcie *rockchip = dev_get_drvdata(dev); > int err; > > - clk_prepare_enable(rockchip->clk_pcie_pm); > - clk_prepare_enable(rockchip->hclk_pcie); > - clk_prepare_enable(rockchip->aclk_perf_pcie); > - clk_prepare_enable(rockchip->aclk_pcie); > + err = clk_prepare_enable(rockchip->clk_pcie_pm); > + if (err) > + goto err_pcie_pm; > + > + err = clk_prepare_enable(rockchip->hclk_pcie); > + if (err) > + goto err_hclk_pcie; > + > + err = clk_prepare_enable(rockchip->aclk_perf_pcie); > + if (err) > + goto err_aclk_perf_pcie; > + > + err = clk_prepare_enable(rockchip->aclk_pcie); > + if (err) > + goto err_aclk_pcie; > > err = rockchip_pcie_init_port(rockchip); > if (err) > - return err; > + goto err_pcie_resume; > > err = rockchip_cfg_atu(rockchip); > if (err) > - return err; > + goto err_pcie_resume; > > /* Need this to enter L1 again */ > rockchip_pcie_update_txcredit_mui(rockchip); > rockchip_pcie_enable_interrupts(rockchip); > > return 0; > + > +err_pcie_resume: > + clk_disable_unprepare(rockchip->aclk_pcie); > +err_aclk_pcie: > + clk_disable_unprepare(rockchip->aclk_perf_pcie); > +err_aclk_perf_pcie: > + clk_disable_unprepare(rockchip->hclk_pcie); > +err_hclk_pcie: > + clk_disable_unprepare(rockchip->clk_pcie_pm); > +err_pcie_pm: > + return err; > } > > static int rockchip_pcie_probe(struct platform_device *pdev) >
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