linux-kernel - Re: [PATCH 4 of 5 ] /drivers/char/rio ioremap balancing/ returncode check

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Date:	Mon, 13 Aug 2007 22:30:14 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	postfail@...hmail.com
CC:	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
	dri-devel@...ts.sourceforge.net
Subject: Re: [PATCH 4 of 5 ] /drivers/char/rio ioremap balancing/ returncode
 check

why dri-devel@...ts.sourceforge.net?

Scott Thompson napsal(a):
> patchset against 2.6.23-rc2 and this set is an audit of 
> /drivers/char/a* 
> through drivers/char .   
> 
> this corrects missing ioremap return checks and balancing on 
> iounmap calls..
> 
> Signed-off-by: Scott Thompson <postfail <at> hushmail.com>
> ----------------------------------------------------------
> diff --git a/drivers/char/rio/rio_linux.c 
> b/drivers/char/rio/rio_linux.c
> index 0ce9667..fdaf44f 100644
> --- a/drivers/char/rio/rio_linux.c
> +++ b/drivers/char/rio/rio_linux.c
> @@ -924,6 +924,11 @@ static void fix_rio_pci(struct pci_dev *pdev)
>  
>  	hwbase = pci_resource_start(pdev, 0);
>  	rebase = ioremap(hwbase, 0x80);
> +	if (!rebase) {
> +		printk(KERN_DEBUG "rio: unable to perform cntrl reg fix as 
> ioremap call failed\n");
> +		return;
> +	}
> +		
>  	t = readl(rebase + CNTRL_REG_OFFSET);
>  	if (t != CNTRL_REG_GOODVALUE) {
>  		printk(KERN_DEBUG "rio: performing cntrl reg fix: %08x -> 
> %08x\n", t, CNTRL_REG_GOODVALUE);
> @@ -996,6 +1001,11 @@ static int __init rio_init(void)
>  		if (((1 << hp->Ivec) & rio_irqmask) == 0)
>  			hp->Ivec = 0;
>  		hp->Caddr = ioremap(p->RIOHosts[p->RIONumHosts].PaddrP, 
> RIO_WINDOW_LEN);
> +		if (!hp->Caddr) {
> +			printk(KERN_ERR "RIO: Unable to ioremap.\n");
> +			return -ENOMEM;
> +		}

hmm, and what about the yet inited cards here?

> +
>  		hp->CardP = (struct DpRam __iomem *) hp->Caddr;
>  		hp->Type = RIO_PCI;
>  		hp->Copy = rio_copy_to_card;
> @@ -1049,6 +1059,10 @@ static int __init rio_init(void)
>  			hp->Ivec = 0;
>  		hp->Ivec |= 0x8000;	/* Mark as non-sharable */
>  		hp->Caddr = ioremap(p->RIOHosts[p->RIONumHosts].PaddrP, 
> RIO_WINDOW_LEN);
> +		if (!hp->Caddr) {
> +			printk(KERN_ERR "RIO: Unable to ioremap.\n");
> +			return -ENOMEM;
> +		}

And here.

>  		hp->CardP = (struct DpRam __iomem *) hp->Caddr;
>  		hp->Type = RIO_PCI;
>  		hp->Copy = rio_copy_to_card;

And what about the one on the line 1093?

-- 
Jiri Slaby (jirislaby@...il.com)
Faculty of Informatics, Masaryk University
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