linux-kernel - Re: [PATCH 4/6] clk: ingenic: Add JZ47xx TCU clocks driver

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Date:   Mon, 1 Jan 2018 20:47:59 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     kbuild-all@...org, Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Lee Jones <lee.jones@...aro.org>, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Paul Cercueil <paul@...pouillou.net>
Subject: Re: [PATCH 4/6] clk: ingenic: Add JZ47xx TCU clocks driver

Hi Paul,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tip/irq/core]
[also build test ERROR on v4.15-rc6 next-20171222]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Paul-Cercueil/Ingenic-JZ47xx-TCU-drivers/20180101-184936
config: mips-qi_lb60_defconfig (attached as .config)
compiler: mipsel-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=mips 

All errors (new ones prefixed by >>):

   drivers/clk//ingenic/tcu.c: In function 'ingenic_tcu_init':
>> drivers/clk//ingenic/tcu.c:293:29: error: 'nb_clocks' undeclared (first use in this function); did you mean 'nb_clks'?
     tcu->clocks.clks = kcalloc(nb_clocks, sizeof(struct clk *), GFP_KERNEL);
                                ^~~~~~~~~
                                nb_clks
   drivers/clk//ingenic/tcu.c:293:29: note: each undeclared identifier is reported only once for each function it appears in

vim +293 drivers/clk//ingenic/tcu.c

   267	
   268	static void __init ingenic_tcu_init(struct device_node *np,
   269			enum ingenic_version id)
   270	{
   271		struct ingenic_tcu *tcu;
   272		size_t i, nb_clks;
   273		int ret = -ENOMEM;
   274	
   275		if (id >= ID_JZ4770)
   276			nb_clks = (JZ4770_CLK_LAST - JZ4740_CLK_TIMER0) + 1;
   277		else
   278			nb_clks = (JZ4740_CLK_LAST - JZ4740_CLK_TIMER0) + 1;
   279	
   280		tcu = kzalloc(sizeof(*tcu), GFP_KERNEL);
   281		if (!tcu) {
   282			pr_err("%s: cannot allocate memory\n", __func__);
   283			return;
   284		}
   285	
   286		tcu->map = syscon_node_to_regmap(np->parent);
   287		if (IS_ERR(tcu->map)) {
   288			pr_err("%s: failed to map TCU registers\n", __func__);
   289			goto err_free_tcu;
   290		}
   291	
   292		tcu->clocks.clk_num = nb_clks;
 > 293		tcu->clocks.clks = kcalloc(nb_clocks, sizeof(struct clk *), GFP_KERNEL);
   294		if (!tcu->clocks.clks) {
   295			pr_err("%s: cannot allocate memory\n", __func__);
   296			goto err_free_tcu;
   297		}
   298	
   299		for (i = 0; i < nb_clks; i++) {
   300			ret = ingenic_tcu_register_clock(tcu, i,
   301					&ingenic_tcu_clk_info[JZ4740_CLK_TIMER0 + i]);
   302			if (ret) {
   303				pr_err("%s: cannot register clocks\n", __func__);
   304				goto err_unregister;
   305			}
   306		}
   307	
   308		ret = of_clk_add_provider(np, of_clk_src_onecell_get, &tcu->clocks);
   309		if (ret) {
   310			pr_err("%s: cannot add OF clock provider\n", __func__);
   311			goto err_unregister;
   312		}
   313	
   314		return;
   315	
   316	err_unregister:
   317		for (i = 0; i < tcu->clocks.clk_num; i++)
   318			if (tcu->clocks.clks[i])
   319				clk_unregister(tcu->clocks.clks[i]);
   320		kfree(tcu->clocks.clks);
   321	err_free_tcu:
   322		kfree(tcu);
   323	}
   324	

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