linux-kernel - Re: [PATCH 1/3] hpet: convert to PNP driver

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]

Date:	Wed, 17 Mar 2010 15:18:27 -0700
From:	Venkatesh Pallipadi <venki@...gle.com>
To:	Bjorn Helgaas <bjorn.helgaas@...com>
Cc:	Clemens Ladisch <clemens@...isch.de>, linux-acpi@...r.kernel.org,
	Vojtech Pavlik <vojtech@...e.cz>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] hpet: convert to PNP driver

On Wed, Mar 17, 2010 at 10:35 AM, Bjorn Helgaas <bjorn.helgaas@...com> wrote:
>
> PNPACPI already parses _CRS, and does a more complete job than we did here,
> so let's just take advantage of that.
>

Patch looks good.
One comment is that we now have a dependency on CONFIG_PNP. That
probably needs to be added in drivers/char/Kconfig. But, that also
means we may fail for users who do not have PNP in their config today.
May be just select PNP when HPET is selected?

> Signed-off-by: Bjorn Helgaas <bjorn.helgaas@...com>
> ---
>
>  drivers/char/hpet.c |  103 +++++++++++++--------------------------------------
>  1 files changed, 27 insertions(+), 76 deletions(-)
>
>
>
> -       if (!data.hd_address || !data.hd_nirqs) {
> -               printk("%s: no address or irqs in _CRS\n", __func__);
> -               return -ENODEV;
> -       }
> +       data.hd_address = ioremap(mem->start, resource_size(mem));
>
>        return hpet_alloc(&data);
>  }

Not a problem with this patch. But, don't we have a problem of rogue
ioremap when hpet_alloc() fails here?

Thanks,
Venki
--
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/