From: Anton Vorontsov <avorontsov@ru•mvista.com>
To: linuxppc-dev@ozlabs•org
Subject: Re: [PATCH] of/i2c: don't pass -1 to irq_dispose_mapping, otherwise kernel will oops
Date: Fri, 11 Jul 2008 22:14:28 +0400 [thread overview]
Message-ID: <20080711181428.GA498@polina.dev.rtsoft.ru> (raw)
In-Reply-To: <20080711174859.GA24260@polina.dev.rtsoft.ru>
On Fri, Jul 11, 2008 at 09:48:59PM +0400, Anton Vorontsov wrote:
> Firstly kernel warns at set_irq_chip, and then dies completely:
>
> Trying to install chip for IRQ-1
> ------------[ cut here ]------------
> Badness at c00463b0 [verbose debug info unavailable]
[..]
> Unable to handle kernel paging request for data at address 0x3863ce7c
Btw, I'm seeing this on linux-next. Just looked into the current Linus'
tree, and it seems that the bug is there too. So, this is probably should
go for 2.6.26.
> Signed-off-by: Anton Vorontsov <avorontsov@ru•mvista.com>
> ---
> drivers/of/of_i2c.c | 13 +++++++------
> 1 files changed, 7 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c
> index b2ccdcb..95a24de 100644
> --- a/drivers/of/of_i2c.c
> +++ b/drivers/of/of_i2c.c
> @@ -93,10 +93,8 @@ void of_register_i2c_devices(struct i2c_adapter *adap,
> if (info.irq == NO_IRQ)
> info.irq = -1;
>
> - if (of_find_i2c_driver(node, &info) < 0) {
> - irq_dispose_mapping(info.irq);
> - continue;
> - }
> + if (of_find_i2c_driver(node, &info) < 0)
> + goto err;
>
> info.addr = *addr;
>
> @@ -107,9 +105,12 @@ void of_register_i2c_devices(struct i2c_adapter *adap,
> printk(KERN_ERR
> "of-i2c: Failed to load driver for %s\n",
> info.type);
> - irq_dispose_mapping(info.irq);
> - continue;
> + goto err;
> }
> + continue;
> +err:
> + if (info.irq > 0)
> + irq_dispose_mapping(info.irq);
> }
> }
> EXPORT_SYMBOL(of_register_i2c_devices);
> --
> 1.5.5.4
--
Anton Vorontsov
email: cbouatmailru@gmail•com
irc://irc.freenode.net/bd2
next prev parent reply other threads:[~2008-07-11 18:14 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-11 17:48 [PATCH] of/i2c: don't pass -1 to irq_dispose_mapping, otherwise kernel will oops Anton Vorontsov
2008-07-11 18:14 ` Anton Vorontsov [this message]
2008-07-11 18:23 ` Grant Likely
2008-07-11 18:55 ` Anton Vorontsov
2008-07-11 19:01 ` Jochen Friedrich
2008-07-11 19:15 ` Anton Vorontsov
2008-07-12 8:22 ` [i2c] " Wolfram Sang
2008-07-12 8:00 ` Wolfram Sang
2008-07-13 3:59 ` Jon Smirl
2008-07-16 22:20 ` Grant Likely
2008-07-11 19:11 ` Jochen Friedrich
2008-07-11 19:19 ` Anton Vorontsov
2008-07-11 21:18 ` Grant Likely
2008-07-11 21:46 ` Anton Vorontsov
2008-07-11 22:08 ` Grant Likely
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