From: "Andrew Jeffery" <andrew@aj.id.au>
To: "Rashmica Gupta" <rashmica.g@gmail.com>,
"Linus Walleij" <linus.walleij@linaro.org>
Cc: "Bartosz Golaszewski" <bgolaszewski@baylibre.com>,
"Joel Stanley" <joel@jms.id.au>,
linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/4] gpio/aspeed: Fix incorrect number of banks
Date: Thu, 05 Sep 2019 13:17:33 +0930 [thread overview]
Message-ID: <5f3ec58f-d83b-41f9-80ed-35a5434bb985@www.fastmail.com> (raw)
In-Reply-To: <20190905011635.15902-1-rashmica.g@gmail.com>
On Thu, 5 Sep 2019, at 10:46, Rashmica Gupta wrote:
> The current calculation for the number of GPIO banks is only correct if
> the number of GPIOs is a multiple of 32 (if there were 31 GPIOs we would
> currently say there are 0 banks, which is incorrect).
>
> Fixes: 361b79119a4b7 ('gpio: Add Aspeed driver')
>
> Signed-off-by: Rashmica Gupta <rashmica.g@gmail.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
> ---
> drivers/gpio/gpio-aspeed.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c
> index 9defe25d4721..b83e23aecd18 100644
> --- a/drivers/gpio/gpio-aspeed.c
> +++ b/drivers/gpio/gpio-aspeed.c
> @@ -1165,7 +1165,7 @@ static int __init aspeed_gpio_probe(struct
> platform_device *pdev)
> gpio->chip.base = -1;
>
> /* Allocate a cache of the output registers */
> - banks = gpio->config->nr_gpios >> 5;
> + banks = DIV_ROUND_UP(gpio->config->nr_gpios, 32);
> gpio->dcache = devm_kcalloc(&pdev->dev,
> banks, sizeof(u32), GFP_KERNEL);
> if (!gpio->dcache)
> --
> 2.20.1
>
>
next prev parent reply other threads:[~2019-09-05 3:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-05 1:16 [PATCH v2 1/4] gpio/aspeed: Fix incorrect number of banks Rashmica Gupta
2019-09-05 3:47 ` Andrew Jeffery [this message]
2019-09-10 22:05 ` Vijay Khemka
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