linux-kernel - Re: [PATCH] PCI: tegra: Fix host initialization during resume

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Message-ID: <7dbc7daf-5512-c938-3aee-3c1994b50d07@nvidia.com>
Date:   Mon, 17 May 2021 15:11:00 +0100
From:   Jon Hunter <jonathanh@...dia.com>
To:     Vidya Sagar <vidyas@...dia.com>, <lorenzo.pieralisi@....com>,
        <robh@...nel.org>, <bhelgaas@...gle.com>,
        <thierry.reding@...il.com>, <jingoohan1@...il.com>,
        <gustavo.pimentel@...opsys.com>
CC:     <linux-pci@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kthota@...dia.com>,
        <mmaddireddy@...dia.com>, <sagar.tv@...il.com>
Subject: Re: [PATCH] PCI: tegra: Fix host initialization during resume

Hi Lorenzo, Bjorn,

On 06/05/2021 09:49, Jon Hunter wrote:
> 
> On 04/05/2021 18:21, Vidya Sagar wrote:
>> Commit 275e88b06a27 ("PCI: tegra: Fix host link initialization") broke
>> host initialization during resume as it misses out calling the API
>> dw_pcie_setup_rc() which is required for host and MSI initialization.
>>
>> Fixes: 275e88b06a27 ("PCI: tegra: Fix host link initialization")
>> Signed-off-by: Vidya Sagar <vidyas@...dia.com>
>> ---
>>  drivers/pci/controller/dwc/pcie-tegra194.c | 2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
>> index 6fa216e52d14..4c3c0738f2e6 100644
>> --- a/drivers/pci/controller/dwc/pcie-tegra194.c
>> +++ b/drivers/pci/controller/dwc/pcie-tegra194.c
>> @@ -2214,6 +2214,8 @@ static int tegra_pcie_dw_resume_noirq(struct device *dev)
>>  		goto fail_host_init;
>>  	}
>>  
>> +	dw_pcie_setup_rc(&pcie->pci.pp);
>> +
>>  	ret = tegra_pcie_dw_start_link(&pcie->pci);
>>  	if (ret < 0)
>>  		goto fail_host_init;
>>
> 
> 
> Thanks for fixing!
> 
> Tested-by: Jon Hunter <jonathanh@...dia.com>
> 
> We should also mark this for stable so that this gets back-ported.


Can we queue this as a fix for v5.13 and tag for stable?

Thanks!
Jon

-- 
nvpublic