linux-kernel - Re: [PATCH] rtc: bunch of drivers: fix 'no irq' case handing

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 for Android: free password hash cracker in your pocket

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

Date:	Mon, 10 Nov 2008 14:34:29 -0800
From:	David Brownell <david-b@...bell.net>
To:	Anton Vorontsov <avorontsov@...mvista.com>
Cc:	Alessandro Zummo <a.zummo@...ertech.it>,
	Andrew Morton <akpm@...ux-foundation.org>,
	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rtc: bunch of drivers: fix 'no irq' case handing

On Thursday 06 November 2008, Anton Vorontsov wrote:
> This patch fixes bunch of irq checking misuses.  Most drivers were getting
> irq via platform_get_irq(), which returns -ENXIO or r->start.  Platforms
> may specify r->start = 0 to emphasize 'no irq' case, and drivers should
> handle this correctly.

Just strike that "Platforms may specify..." sentence.  It's incorrect.
The normal way to specify "no IRQ" is, surprise!, to not specify one.

The rule about IRQ=0 is that it's not for generic driver use... and I
happen to know a family of platforms where it's used for the RTC and
a few other core system drivers.  (Your patch doesn't touch them.)


> ...
> 
> Signed-off-by: Anton Vorontsov <avorontsov@...mvista.com>

Acked-by: David Brownell <dbrownell@...rs.sourceforge.net>


--
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/