From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: chenyu56@huawei.com
Cc: USB <linux-usb@vger.kernel.org>,
devicetree <devicetree@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Suzhuangluan <suzhuangluan@hisilicon.com>,
Kongfei <kongfei@hisilicon.com>, Felipe Balbi <balbi@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
John Stultz <john.stultz@linaro.org>,
Wangbinghui <wangbinghui@hisilicon.com>
Subject: Re: [PATCH v1 11/12] usb: gadget: Add configfs attribuite for controling match_existing_only
Date: Mon, 3 Dec 2018 11:25:36 +0200 [thread overview]
Message-ID: <CAHp75VcUQN_PuXDVkeR+jagTsUaOWLtytVt+f_eR+x2iw9B5-A@mail.gmail.com> (raw)
In-Reply-To: <20181203034515.91412-12-chenyu56@huawei.com>
On Mon, Dec 3, 2018 at 5:47 AM Yu Chen <chenyu56@huawei.com> wrote:
>
> Currently the "match_existing_only" of usb_gadget_driver in configfs is
> set to one which is not flexible.
> Dwc3 udc will be removed when usb core switch to host mode. This causes
> failure of writing name of dwc3 udc to configfs's UDC attribuite.
> To fix this we need to add a way to change the config of
> "match_existing_only".
> This patch adds a configfs attribuite for controling match_existing_only
> which allow user to config "match_existing_only".
> +static ssize_t gadget_driver_match_existing_only_store(struct config_item *item,
> + const char *page, size_t len)
> +{
> + struct usb_gadget_driver *gadget_driver =
> + &(to_gadget_info(item)->composite.gadget_driver);
It would be easier for reader to see two lines with two variables
instead of this.
> + bool match_existing_only;
> + int ret;
> +
> + ret = kstrtobool(page, &match_existing_only);
> + if (ret)
> + return ret;
> +
> + if (match_existing_only)
> + gadget_driver->match_existing_only = 1;
> + else
> + gadget_driver->match_existing_only = 0;
gadget_driver->match_existing_only = match_existing_only;
But the question rather why is it not direct parameter to kstrtobool?
> +
> + return len;
> +}
> + struct usb_gadget_driver *gadget_driver =
> + &(to_gadget_info(item)->composite.gadget_driver);
Make it neat.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2018-12-03 9:25 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-03 3:45 [PATCH v1 00/12] Add support for usb on Hikey960 Yu Chen
2018-12-03 3:45 ` [PATCH v1 01/12] dt-bindings: usb: add support for dwc3 controller on HiSilicon SoCs Yu Chen
2018-12-03 8:35 ` Sergei Shtylyov
2018-12-03 8:51 ` Chen Yu
2018-12-03 8:59 ` Sergei Shtylyov
2018-12-03 9:28 ` Chen Yu
2018-12-19 14:09 ` Rob Herring
2018-12-20 1:33 ` Chen Yu
2018-12-20 6:46 ` Felipe Balbi
2018-12-20 13:48 ` Rob Herring
2018-12-03 3:45 ` [PATCH v1 02/12] dt-bindings: phy: Add support for HiSilicon's hi3660 USB PHY Yu Chen
2018-12-19 14:14 ` Rob Herring
2018-12-20 1:52 ` Chen Yu
2018-12-03 3:45 ` [PATCH v1 03/12] dt-bindings: misc: Add bindings for HiSilicon usb hub and data role switch functionality on HiKey960 Yu Chen
2018-12-19 14:21 ` Rob Herring
2018-12-20 2:02 ` Chen Yu
2018-12-03 3:45 ` [PATCH v1 04/12] usb: dwc3: dwc3-hisi: Add code for dwc3 of Hisilicon Soc Platform Yu Chen
2018-12-03 8:12 ` Andy Shevchenko
2018-12-03 8:30 ` Chen Yu
2018-12-03 3:45 ` [PATCH v1 05/12] usb: dwc3: Add two quirks for Hisilicon Kirin " Yu Chen
2018-12-03 8:02 ` Andy Shevchenko
2018-12-03 8:23 ` Chen Yu
2018-12-03 3:45 ` [PATCH v1 06/12] phy: Add usb phy support for hi3660 Soc of Hisilicon Yu Chen
2018-12-03 8:14 ` Andy Shevchenko
2018-12-03 3:45 ` [PATCH v1 07/12] usb: roles: Find the usb role switch by also matching against the device node Yu Chen
2018-12-03 8:17 ` Andy Shevchenko
2018-12-03 12:25 ` Heikki Krogerus
2019-01-21 8:36 ` Chen Yu
2019-01-21 13:51 ` Heikki Krogerus
2019-01-25 12:35 ` Heikki Krogerus
2018-12-03 3:45 ` [PATCH v1 08/12] usb: roles: Add usb role switch notifier Yu Chen
2018-12-03 12:38 ` Heikki Krogerus
2018-12-04 1:07 ` Chen Yu
2018-12-03 3:45 ` [PATCH v1 09/12] usb: dwc3: Registering a role switch in the DRD code Yu Chen
2018-12-03 9:15 ` Andy Shevchenko
2018-12-03 9:30 ` Chen Yu
2018-12-03 12:43 ` Heikki Krogerus
2018-12-04 10:54 ` Heikki Krogerus
2018-12-05 0:56 ` Chen Yu
2018-12-03 3:45 ` [PATCH v1 10/12] hikey960: Support usb functionality of Hikey960 Yu Chen
2018-12-03 9:23 ` Andy Shevchenko
2018-12-04 1:40 ` Chen Yu
2018-12-04 17:47 ` Andy Shevchenko
2018-12-05 1:57 ` Chen Yu
2018-12-05 8:44 ` Andy Shevchenko
2018-12-03 3:45 ` [PATCH v1 11/12] usb: gadget: Add configfs attribuite for controling match_existing_only Yu Chen
2018-12-03 9:25 ` Andy Shevchenko [this message]
2018-12-04 1:22 ` Chen Yu
2018-12-03 9:53 ` Krzysztof Opasiak
2018-12-03 3:45 ` [PATCH v1 12/12] dts: hi3660: Add support for usb on Hikey960 Yu Chen
2018-12-04 12:45 ` Heikki Krogerus
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