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Message-ID: <CADyBb7uX79UP=mUxvP-EPGi56-46y2SCMPsWO=Uw-=N0GQERhA@mail.gmail.com>
Date: Wed, 7 Sep 2016 17:23:43 +0800
From: Fu Wei <fu.wei@...aro.org>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>,
Len Brown <lenb@...nel.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Marc Zyngier <marc.zyngier@....com>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Sudeep Holla <sudeep.holla@....com>,
Hanjun Guo <hanjun.guo@...aro.org>,
linux-arm-kernel@...ts.infradead.org,
Linaro ACPI Mailman List <linaro-acpi@...ts.linaro.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
rruigrok@...eaurora.org, harba@...eaurora.org,
Christopher Covington <cov@...eaurora.org>,
Timur Tabi <timur@...eaurora.org>,
G Gregory <graeme.gregory@...aro.org>,
Al Stone <al.stone@...aro.org>, Jon Masters <jcm@...hat.com>,
wei@...hat.com, Arnd Bergmann <arnd@...db.de>,
Wim Van Sebroeck <wim@...ana.be>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>,
Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
Leo Duran <leo.duran@....com>,
Guenter Roeck <linux@...ck-us.net>,
linux-watchdog@...r.kernel.org
Subject: Re: [PATCH v11 5/8] clocksource/drivers/arm_arch_timer: Simplify ACPI
support code.
Hi Thomas
On 6 September 2016 at 22:36, Thomas Gleixner <tglx@...utronix.de> wrote:
> On Tue, 6 Sep 2016, fu.wei@...aro.org wrote:
>> + if (timer_count < 0)
>> + pr_err("Failed to get platform timer info, skipping.\n");
>
> So this prints something about skipping. But then it continues as if
> nothing went wrong. That's either wrong or confusing or both.
yes, you are right, this info is confusing.
maybe we just delete the "skipping" ?
“timer_count < 0” is caused by some firmware bug, in gtdt.c:
----
int __init acpi_gtdt_init(struct acpi_table_header *table)
{
......
if (start < (void *)table + sizeof(struct acpi_table_gtdt)) {
pr_err(FW_BUG "Failed to retrieve timer info from firmware:
invalid data.\n");
return -EINVAL;
......
}
----
But in this situation( without platform timers ), system still can work.
So I thing we just need to print a error.
>
>> - arch_timer_init();
>> - return 0;
>> + return arch_timer_init();
>
> Thanks,
>
> tglx
--
Best regards,
Fu Wei
Software Engineer
Red Hat
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