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Date: Mon, 29 Feb 2016 12:46:26 +0200 From: Andy Shevchenko <andy.shevchenko@...il.com> To: qiujiang <qiujiang@...wei.com> Cc: Linus Walleij <linus.walleij@...aro.org>, Alexandre Courbot <gnurou@...il.com>, Mika Westerberg <mika.westerberg@...ux.intel.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>, "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>, linuxarm@...wei.com, haifeng.wei@...wei.com, charles.chenxin@...wei.com Subject: Re: [PATCH v3 1/2] gpio: designware: switch device node to fwnode On Sat, Feb 27, 2016 at 9:15 AM, Jiang Qiu <qiujiang@...wei.com> wrote: >>>>> - node = dev->of_node; >>>>> - if (!IS_ENABLED(CONFIG_OF_GPIO) || !node) >>>>> + if (!IS_ENABLED(CONFIG_OF_GPIO) || !(dev->of_node)) >>>>> return ERR_PTR(-ENODEV); >>>> >>>> So, since you converted to fwnode, do you still need this check? >>>> >>> Although this patch coverted device node to fwnode, only DTs binding was >>> supported here, and patch2 support ACPI will remove this check. >> >> Yes, but like I said below device_get_child_node_count() will take >> care of that, will it? > Right, device_get_child_node_count() will take of it, this should be removed. >> >>>>> >>>>> - nports = of_get_child_count(node); >>>>> + nports = device_get_child_node_count(dev); >>>>> if (nports == 0) >>>>> return ERR_PTR(-ENODEV); >>>> >>>> ...I think this one fail if it will not found any child. >>> This one fail? yes, it will return to failure. >>> I am not very clear here. >> >> See above. > Here, device_get_child_node_count will return ZERO if there is not any child. > So, I think this will work ok, will it? I didn't check deeply, but I assume so. -- With Best Regards, Andy Shevchenko
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