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SubjectRe: [PATCH 5/5] ioremap balanced with iounmap for drivers/char/watchdog/s3c2410_wdt.c
On Fri, 06 Oct 2006 10:27:07 +0530
Amol Lad <amol@verismonetworks.com> wrote:

> Signed-off-by: Amol Lad <amol@verismonetworks.com>
> ---
> s3c2410_wdt.c | 5 +++++
> 1 files changed, 5 insertions(+)
> ---
> diff -uprN -X linux-2.6.19-rc1-orig/Documentation/dontdiff linux-2.6.19-rc1-orig/drivers/char/watchdog/s3c2410_wdt.c linux-2.6.19-rc1/drivers/char/watchdog/s3c2410_wdt.c
> --- linux-2.6.19-rc1-orig/drivers/char/watchdog/s3c2410_wdt.c 2006-10-05 14:00:43.000000000 +0530
> +++ linux-2.6.19-rc1/drivers/char/watchdog/s3c2410_wdt.c 2006-10-05 14:50:00.000000000 +0530
> @@ -381,18 +381,21 @@ static int s3c2410wdt_probe(struct platf
> res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> if (res == NULL) {
> printk(KERN_INFO PFX "failed to get irq resource\n");
> + iounmap(wdt_base);
> return -ENOENT;
> }
>
> ret = request_irq(res->start, s3c2410wdt_irq, 0, pdev->name, pdev);
> if (ret != 0) {
> printk(KERN_INFO PFX "failed to install irq (%d)\n", ret);
> + iounmap(wdt_base);
> return ret;
> }
>
> wdt_clock = clk_get(&pdev->dev, "watchdog");
> if (wdt_clock == NULL) {
> printk(KERN_INFO PFX "failed to find watchdog clock source\n");
> + iounmap(wdt_base);
> return -ENOENT;
> }
>
> @@ -416,6 +419,7 @@ static int s3c2410wdt_probe(struct platf
> if (ret) {
> printk (KERN_ERR PFX "cannot register miscdev on minor=%d (%d)\n",
> WATCHDOG_MINOR, ret);
> + iounmap(wdt_base);
> return ret;
> }
>

barf. That function has to set the record for the
number-of-return-statements-per-line. There are good reasons why we prefer
to have a single return point at which to handle all the error unwinding,
and the above patch illustrates one of them.

Sigh. Oh well, patch looks correct - I'll start spamming Wim with it,
thanks.

(Not that Wim - this Wim).

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