linux-kernel - Re: [PATCH] gpio: Add missing spin_lock

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Date:	Tue, 17 Jan 2012 17:23:44 +0900
From:	Tomoya MORINAGA <tomoya.rohm@...il.com>
To:	Axel Lin <axel.lin@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Tomoya MORINAGA <tomoya-linux@....lapis-semi.com>,
	Feng Tang <feng.tang@...el.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Linus Walleij <linus.walleij@...ricsson.com>
Subject: Re: [PATCH] gpio: Add missing spin_lock_init in gpio-ml-ioh driver

Hi Alex

Thank you for your indication.
gpio-pch also looks having the same issue.
Could you post the patch for gpio-pch ?
If you can't, I wil post the patch.

thanks,
tomoya

2012/1/17 Axel Lin <axel.lin@...il.com>:
> I think this bug was introduced by commit 54be5663
> "gpio-ml-ioh: Support interrupt function" which adds a spinlock to struct
> ioh_gpio but never init the spinlock.
>
> Signed-off-by: Axel Lin <axel.lin@...il.com>
> ---
>  drivers/gpio/gpio-ml-ioh.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c
> index 461958f..271fd49 100644
> --- a/drivers/gpio/gpio-ml-ioh.c
> +++ b/drivers/gpio/gpio-ml-ioh.c
> @@ -448,6 +448,7 @@ static int __devinit ioh_gpio_probe(struct pci_dev *pdev,
>                chip->reg = chip->base;
>                chip->ch = i;
>                mutex_init(&chip->lock);
> +               spin_lock_init(&chip->spinlock);
>                ioh_gpio_setup(chip, num_ports[i]);
>                ret = gpiochip_add(&chip->gpio);
>                if (ret) {
> --
> 1.7.5.4
>
>
>
> --
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