linux-kernel - Re: [Cocci] [PATCH v13 3/6] clk: Make clk API return per-user struct clk instances

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <5501EC6C.5010100@codeaurora.org>
Date:	Thu, 12 Mar 2015 12:43:40 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Sebastian Andrzej Siewior <sebastian@...akpoint.cc>,
	Shawn Guo <shawn.guo@...aro.org>
CC:	Quentin Lambert <lambert.quentin@...il.com>,
	Mike Turquette <mturquette@...aro.org>,
	Julia Lawall <julia.lawall@...6.fr>,
	Paul Walmsley <paul@...an.com>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	Tony Lindgren <tony@...mide.com>, linux-kernel@...r.kernel.org,
	t-kristo@...com, linux-omap@...r.kernel.org, cocci@...teme.lip6.fr,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [Cocci] [PATCH v13 3/6] clk: Make clk API return per-user struct
 clk instances

On 03/12/15 10:20, Sebastian Andrzej Siewior wrote:
> On 2015-02-17 14:01:04 [-0800], Stephen Boyd wrote:
>> diff = 
>> --- arch/arm/mach-imx/mach-imx6q.c
>> +++ /tmp/cocci-output-11792-b62223-mach-imx6q.c
>> @@ -211,7 +211,6 @@ static void __init imx6q_1588_init(void)
>>  	 * set bit IOMUXC_GPR1[21].  Or the PTP clock must be from pad
>>  	 * (external OSC), and we need to clear the bit.
>>  	 */
>> -	clksel = ptp_clk == enet_ref ? IMX6Q_GPR1_ENET_CLK_SEL_ANATOP :
>>  				       IMX6Q_GPR1_ENET_CLK_SEL_PAD;
>>  	gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
>>  	if (!IS_ERR(gpr))
> Any idea how to do the comparison here? Or should we rely that the bootloader
> sets this properly (it managed already to select a frequency)? The phy has no
> clock node in current DT's so we can check this.
>

This has been fixed by adding a clk_is_match() helper and using that to
compare instead of comparing raw pointers. It would be nice if we could
replace the patch with something else that doesn't require this helper
though. It looks like this is static board configuration, so I wonder
why we didn't just have a DT property that indicates how the gpr should
be configured for this particular board.

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/