From: Wesley Cheng <wcheng@codeaurora.org>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: robh+dt@kernel.org, agross@kernel.org,
bjorn.andersson@linaro.org, balbi@kernel.org,
linux-usb@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
jackp@codeaurora.org, fntoth@gmail.com
Subject: Re: [PATCH v11 4/5] usb: dwc3: dwc3-qcom: Enable tx-fifo-resize property by default
Date: Fri, 2 Jul 2021 01:10:13 -0700 [thread overview]
Message-ID: <83237faa-9840-5d31-43da-8ce551e75067@codeaurora.org> (raw)
In-Reply-To: <YN6e8G1e9cZBBMr7@kroah.com>
On 7/1/2021 10:06 PM, Greg KH wrote:
> On Wed, Jun 30, 2021 at 02:00:41AM -0700, Wesley Cheng wrote:
>> In order to take advantage of the TX fifo resizing logic, manually add
>> these properties to the DWC3 child node by default. This will allow
>> the DWC3 gadget to resize the TX fifos for the IN endpoints, which
>> help with performance.
>>
>> Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
>> ---
>> drivers/usb/dwc3/dwc3-qcom.c | 21 +++++++++++++++++++++
>> 1 file changed, 21 insertions(+)
>>
>> diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
>> index 49e6ca9..cec4f4a 100644
>> --- a/drivers/usb/dwc3/dwc3-qcom.c
>> +++ b/drivers/usb/dwc3/dwc3-qcom.c
>> @@ -640,6 +640,25 @@ static int dwc3_qcom_acpi_register_core(struct platform_device *pdev)
>> return ret;
>> }
>>
>> +#ifdef CONFIG_OF
>> +static void dwc3_qcom_add_dt_props(struct device *dev, struct device_node *np)
>> +{
>> + struct property *prop;
>> + int ret;
>> +
>> + prop = devm_kzalloc(dev, sizeof(*prop), GFP_KERNEL);
>> + if (prop) {
>> + prop->name = "tx-fifo-resize";
>> + ret = of_add_property(np, prop);
>> + if (ret < 0)
>> + dev_info(dev, "unable to add tx-fifo-resize prop\n");
Hi Greg,
>
> Is that really an "informational" error? :(
>
>
We can remove it. If anything we can always check the sysfs if the
property is present or not.
>> + }
>
> So if you can not allocate memory, you just fail quietly? Are you sure
> that is ok?
>
> Please properly handle errors.
>
OK, will handle the case where we can't allocate memory for the property.
Thanks
Wesley Cheng
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2021-07-02 8:11 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-30 9:00 [PATCH v11 0/5] Re-introduce TX FIFO resize for larger EP bursting Wesley Cheng
2021-06-30 9:00 ` [PATCH v11 1/5] usb: gadget: udc: core: Introduce check_config to verify USB configuration Wesley Cheng
2021-07-02 5:00 ` Greg KH
2021-07-02 8:00 ` Wesley Cheng
2021-06-30 9:00 ` [PATCH v11 2/5] usb: gadget: configfs: Check USB configuration before adding Wesley Cheng
2021-06-30 9:00 ` [PATCH v11 3/5] usb: dwc3: Resize TX FIFOs to meet EP bursting requirements Wesley Cheng
2021-06-30 9:00 ` [PATCH v11 4/5] usb: dwc3: dwc3-qcom: Enable tx-fifo-resize property by default Wesley Cheng
2021-07-01 1:09 ` kernel test robot
2021-07-02 5:06 ` Greg KH
2021-07-02 8:10 ` Wesley Cheng [this message]
2021-07-02 8:19 ` Greg KH
2021-06-30 9:00 ` [PATCH v11 5/5] dt-bindings: usb: dwc3: Update dwc3 TX fifo properties Wesley Cheng
2021-07-02 5:04 ` [PATCH v11 0/5] Re-introduce TX FIFO resize for larger EP bursting Greg KH
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