From: Adam Lee <adam.lee@canonical.com>
To: "Bjørn Mork" <bjorn@mork.no>
Cc: linux-kernel@vger.kernel.org,
platform-driver-x86@vger.kernel.org,
ibm-acpi-devel@lists.sourceforge.net,
Matthew Garrett <matthew.garrett@nebula.com>,
Henrique de Moraes Holschuh <ibm-acpi@hmh.eng.br>,
Alex Hung <alex.hung@canonical.com>
Subject: Re: [PATCH 1/3] thinkpad_acpi: return -NODEV while operating uninitialized LEDs
Date: Fri, 7 Jun 2013 16:59:05 +0800 [thread overview]
Message-ID: <20130607085905.GA7325@adam-laptop> (raw)
In-Reply-To: <87vc5qxpwh.fsf@nemi.mork.no>
On Fri, Jun 07, 2013 at 10:53:50AM +0200, Bjørn Mork wrote:
> Adam Lee <adam.lee@canonical.com> writes:
>
> > --- a/drivers/platform/x86/thinkpad_acpi.c
> > +++ b/drivers/platform/x86/thinkpad_acpi.c
> > @@ -5401,9 +5401,12 @@ static int led_write(char *buf)
> > return -ENODEV;
> >
> > while ((cmd = next_cmd(&buf))) {
> > - if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
> > + if (sscanf(cmd, "%d", &led) != 1)
> > return -EINVAL;
> >
> > + if (!tpacpi_leds[led].led)
> > + return -ENODEV;
>
> This looks risky. Why did you remove the index sanity check? What will
> happen now if the input is e.g "-1" or "42"?
>
> BTW, the magic number 15 should probably be (TPACPI_LED_NUMLEDS - 1)
> instead.
Oh, good point! I was thinking led_init() already checked the index.
Will submit patch v2, thanks.
--
Regards,
Adam Lee
Hardware Enablement
next prev parent reply other threads:[~2013-06-07 8:59 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-07 8:20 [PATCH 0/3] thinkpad_acpi: avoid ACPI Warning while operating non-exist LEDs Adam Lee
2013-06-07 8:20 ` [PATCH 1/3] thinkpad_acpi: return -NODEV while operating uninitialized LEDs Adam Lee
2013-06-07 8:53 ` Bjørn Mork
2013-06-07 8:59 ` Adam Lee [this message]
2013-06-18 0:12 ` Henrique de Moraes Holschuh
2013-06-18 0:18 ` Henrique de Moraes Holschuh
2013-06-07 8:20 ` [PATCH 2/3] thinkpad_acpi: add the ability setting TPACPI_LED_NONE by quirk Adam Lee
2013-06-18 0:19 ` Henrique de Moraes Holschuh
2013-06-07 8:20 ` [PATCH 3/3] thinkpad_acpi: add LED quirks of models which don't have EC controllable LEDs Adam Lee
2013-06-07 13:22 ` Matthew Garrett
2013-06-07 15:06 ` Adam Lee
2013-06-07 20:16 ` Henrique de Moraes Holschuh
2013-06-08 9:04 ` Adam Lee
2013-06-18 0:20 ` Henrique de Moraes Holschuh
2013-06-07 9:05 ` [PATCH v2] thinkpad_acpi: return -NODEV while operating uninitialized LEDs Adam Lee
2013-06-08 2:19 ` Amos Kong
2013-06-08 8:51 ` [PATCH 1/3 v3] " Adam Lee
2013-06-18 0:17 ` Henrique de Moraes Holschuh
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