linux-kernel - Re: [patch] tty: mxser: forever loops on error

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Date:	Tue, 09 Apr 2013 09:50:35 +0400
From:	Alexey Khoroshilov <khoroshilov@...ras.ru>
To:	Dan Carpenter <dan.carpenter@...cle.com>
CC:	Jiri Slaby <jirislaby@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [patch] tty: mxser: forever loops on error

Hi Dan,

Thank you for the patch.

We are also trying to fix the issue:
https://lkml.org/lkml/2013/2/19/29
https://lkml.org/lkml/2013/4/8/55

and the fix is finally in Greg's tty git tree since yesterday:
    git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
(tty-linus branch).

Best regards,
Alexey


On 04/09/2013 09:18 AM, Dan Carpenter wrote:
> There were a couple signedness bugs decrementing "i" which would lead to
> a forever loops.
>
> I've made a couple other variables signed as well because they are all
> related array offsets and it would be weird if they weren't the same
> type.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
>
> diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
> index d996038..a095859 100644
> --- a/drivers/tty/mxser.c
> +++ b/drivers/tty/mxser.c
> @@ -2556,9 +2556,9 @@ static int mxser_probe(struct pci_dev *pdev,
>  {
>  #ifdef CONFIG_PCI
>  	struct mxser_board *brd;
> -	unsigned int i, j;
>  	unsigned long ioaddress;
>  	struct device *tty_dev;
> +	int i, j;
>  	int retval = -EINVAL;
>  
>  	for (i = 0; i < MXSER_BOARDS; i++)
> @@ -2700,7 +2700,7 @@ static int __init mxser_module_init(void)
>  {
>  	struct mxser_board *brd;
>  	struct device *tty_dev;
> -	unsigned int b, i, m;
> +	int b, i, m;
>  	int retval;
>  
>  	mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
>

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