linux-kernel - Re: [PATCH] SUN3/3X Lance trivial fix

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Message-ID: <45C86A57.4070308@gmail.com>
Date:	Tue, 06 Feb 2007 12:45:27 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	"Cyrill V. Gorcunov" <gorcunov@...il.com>,
	Sam Creasey <sammy@...my.net>,
	linux-kernel-list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] SUN3/3X Lance trivial fix

Jiri Slaby napsal(a):
> Cyrill V. Gorcunov napsal(a):
>> This patch adds checking for allocated DVMA
>> memory and granted IRQ line.
>>
>> Signed-off-by: Cyrill V. Gorcunov <gorcunov@...il.com>
>>
>> ---
>>
>>  drivers/net/sun3lance.c |    9 ++++++++-
>>  1 files changed, 8 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/net/sun3lance.c b/drivers/net/sun3lance.c
>> index c62e85d..e4c2c88 100644
>> --- a/drivers/net/sun3lance.c
>> +++ b/drivers/net/sun3lance.c
>> @@ -336,13 +336,20 @@ static int __init lance_probe( struct net_device 
>> *dev)
>>  
>>      /* XXX - leak? */
>>      MEM = dvma_malloc_align(sizeof(struct lance_memory), 0x10000);
>> +    if (MEM == NULL) {
>> +        printk(KERN_WARNING "SUN3 Lance couldn't allocate DVMA 
>> memory\n");
>> +        return 0;
>> +    }
>>  
>>      lp->iobase = (volatile unsigned short *)ioaddr;
>>      dev->base_addr = (unsigned long)ioaddr; /* informational only */
> 
> But now, if it fails (and you return 0=OK state) these are not assigned 

Ok, 0 is not OK state, I see it now.

> and probably used later.
> 
>>  
>>      REGA(CSR0) = CSR0_STOP;
>>  
>> -    request_irq(LANCE_IRQ, lance_interrupt, IRQF_DISABLED, "SUN3 
>> Lance", dev);
>> +    if (request_irq(LANCE_IRQ, lance_interrupt, IRQF_DISABLED, "SUN3 
>> Lance", dev) < 0) {
>> +        printk(KERN_WARNING "SUN3 Lance unable to allocate IRQ\n");

But in that case, you want to dvma_free() here?

>> +        return 0;
>> +    }
>>      dev->irq = (unsigned short)LANCE_IRQ;

regards,
-- 
http://www.fi.muni.cz/~xslaby/            Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8  22A0 32CC 55C3 39D4 7A7E
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