Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [RFC PATCH] USB: PCI: set 32bit DMA mask for PCI based USB
 controllers
To:     John Garry <john.garry@huawei.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Robin Murphy <robin.murphy@arm.com>,
        "Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Bjorn Helgaas <helgaas@kernel.org>,
        Christoph Hellwig <hch@lst.de>
CC:     <linux-usb@vger.kernel.org>, <linux-acpi@vger.kernel.org>,
        <linux-pci@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linuxarm@huawei.com>,
        Jonathan Cameron <Jonathan.Cameron@huawei.com>,
        <anthony.jebson@huawei.com>, Hanjun Guo <hanjun.guo@linaro.org>
References: <1548831714-3706-1-git-send-email-guohanjun@huawei.com>
 <f9a8ab1f-d560-0fb6-dfc9-61be3c1a2d82@huawei.com>
From:   Hanjun Guo <guohanjun@huawei.com>
Message-ID: <ce031291-3050-3817-0ed9-9d83dad0cc55@huawei.com>
Date:   Fri, 1 Feb 2019 13:55:00 +0800
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101
 Thunderbird/52.5.0
MIME-Version: 1.0
In-Reply-To: <f9a8ab1f-d560-0fb6-dfc9-61be3c1a2d82@huawei.com>
Content-Type: text/plain; charset="windows-1252"
Content-Language: en-US
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi John,

On 2019/1/31 17:54, John Garry wrote:
> On 30/01/2019 07:01, Hanjun Guo wrote:
>> From: Hanjun Guo <hanjun.guo@linaro.org>
[...]
>>
>> ?drivers/usb/core/hcd-pci.c | 4 ++++
>> ?1 file changed, 4 insertions(+)
>>
>> diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
>> index 0343246..a9c33e6 100644
>> --- a/drivers/usb/core/hcd-pci.c
>> +++ b/drivers/usb/core/hcd-pci.c
>> @@ -188,6 +188,10 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
>> ???? if (pci_enable_device(dev) < 0)
>> ???????? return -ENODEV;
>>
>> +??? retval = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
>> +??? if (retval)
>> +??????? return retval;
> 
> Hi Hanjun,
> 
> You're missing tidy-up upon failure.

Good catch, needs to disable pci for failure, I will send
a updated version to address the comments from you and Christoph.

Thanks
Hanjun