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References: <20190904061245.30770-1-rashmica.g@gmail.com>
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From:   Andy Shevchenko <andy.shevchenko@gmail.com>
Date:   Wed, 4 Sep 2019 19:27:33 +0300
Message-ID: <CAHp75Vd_6Rpt5=BjzV8YFCiFP7qsRrYHHo7+=gWwnZH-zT9jNw@mail.gmail.com>
Subject: Re: [PATCH 1/4] gpio/aspeed: Fix incorrect number of banks
To:     Rashmica Gupta <rashmica.g@gmail.com>
Cc:     Linus Walleij <linus.walleij@linaro.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@baylibre.com>,
        linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
        linux-aspeed@lists.ozlabs.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>
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On Wed, Sep 4, 2019 at 9:14 AM Rashmica Gupta <rashmica.g@gmail.com> wrote:
>
> Fixes: 361b79119a4b7 ('gpio: Add Aspeed driver')
>
> Signed-off-by: Rashmica Gupta <rashmica.g@gmail.com>

>         /* Allocate a cache of the output registers */
> -       banks = gpio->config->nr_gpios >> 5;
> +       banks = (gpio->config->nr_gpios >> 5) + 1;

Shouldn't be rather DIV_ROUND_UP(nr_gpios, sizeof(u32)) ?

>         gpio->dcache = devm_kcalloc(&pdev->dev,
>                                     banks, sizeof(u32), GFP_KERNEL);


-- 
With Best Regards,
Andy Shevchenko