linux-kernel - Re: [PATCH] mtd: gpio-addr-flash: add missing iounmap in probe/remove

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Message-ID: <CAAEAJfD9iwFNkcA5Vsz6jFgMDGqmKFxYrQJgMB1eywc80cZ0EQ@mail.gmail.com>
Date:	Sat, 25 Jul 2015 14:44:00 -0300
From:	Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
To:	Alexey Khoroshilov <khoroshilov@...ras.ru>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	Mike Frysinger <vapier@...too.org>,
	ldv-project@...uxtesting.org,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mtd: gpio-addr-flash: add missing iounmap in probe/remove

Hi Alexey,

On 25 July 2015 at 13:49, Alexey Khoroshilov <khoroshilov@...ras.ru> wrote:
> There is no iounmap(state->map.virt) in gpio_flash_remove() and
> in gpio_flash_probe() error handling code.
>

Is there any reason why we can't just use managed variants? E.g.

diff --git a/drivers/mtd/maps/gpio-addr-flash.c
b/drivers/mtd/maps/gpio-addr-flash.c
index 2fb3460..bbaa92b 100644
--- a/drivers/mtd/maps/gpio-addr-flash.c
+++ b/drivers/mtd/maps/gpio-addr-flash.c
@@ -238,7 +238,8 @@ static int gpio_flash_probe(struct platform_device *pdev)
        state->map.copy_to    = gf_copy_to;
        state->map.bankwidth  = pdata->width;
        state->map.size       = state->win_size * (1 << state->gpio_count);
-       state->map.virt       = ioremap_nocache(memory->start, state->map.size);
+       state->map.virt       = devm_ioremap_nocache(&pdev->dev, memory->start,
+                                                    state->map.size);
        state->map.phys       = NO_XIP;
        state->map.map_priv_1 = (unsigned long)state;

Notice the error checks are still needed though, but managed stuff would make
it simpler.

-- 
Ezequiel García, VanguardiaSur
www.vanguardiasur.com.ar
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