linux-kernel - Re: [PATCH] ip2: Remove #ifdef MODULE from ip2main.c

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Date:	Thu, 3 Dec 2009 20:14:33 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Rakib Mullick <rakib.mullick@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"Michael H. Warfield" <mhw@...tsend.com>
Subject: Re: [PATCH] ip2: Remove #ifdef MODULE from ip2main.c

On Tue, 1 Dec 2009 15:02:56 +0600 Rakib Mullick <rakib.mullick@...il.com> wrote:

> >From kernel command line we can pass "module parameters".
> So #ifdef MODULE is obsolute now. Remove it completely.
> When CONFIG_PCI=n and building ip2main.c then we are hit
> by the following warning. So move *pdev into #ifdef CONFIG_PCI.
> 
> drivers/char/ip2/ip2main.c: In function `ip2_loadmain':
> drivers/char/ip2/ip2main.c:542: warning: unused variable `pdev'

x86_64 allmodconfig:

drivers/char/ip2/ip2main.c: In function 'ip2_loadmain':
drivers/char/ip2/ip2main.c:657: error: 'pdev' undeclared (first use in this function)
drivers/char/ip2/ip2main.c:657: error: (Each undeclared identifier is reported only once
drivers/char/ip2/ip2main.c:657: error: for each function it appears in.)


I suppose this:

--- a/drivers/char/ip2/ip2main.c~ip2-remove-ifdef-module-from-ip2mainc-fix
+++ a/drivers/char/ip2/ip2main.c
@@ -636,6 +636,7 @@ static int __init ip2_loadmain(void)
 				dev_err(&pdev->dev, "I/O address error\n");
 
 			ip2config.irq[i] = pdev->irq;
+			pci_dev_put(pdev);
 		}
 #else
 			printk(KERN_ERR "IP2: PCI card specified but PCI "
@@ -654,7 +655,6 @@ static int __init ip2_loadmain(void)
 			break;
 		}	/* switch */
 	}	/* for */
-	pci_dev_put(pdev);
 
 	for (i = 0; i < IP2_MAX_BOARDS; ++i) {
 		if (ip2config.addr[i]) {
_

but it needs checking - does pci_get_device() need a balancing pci_dev_put()?
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