linux-kernel - Re: [PATCH v2 4/4] gpio: pca953x: fix an incorrect lockdep warning

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Date:   Sat, 24 Sep 2016 11:15:06 +0200
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Bartosz Golaszewski <bgolaszewski@...libre.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Vignesh R <vigneshr@...com>, Yong Li <yong.b.li@...el.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, Peter Rosin <peda@...ntia.se>,
        linux-i2c <linux-i2c@...r.kernel.org>,
        linux-gpio <linux-gpio@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 4/4] gpio: pca953x: fix an incorrect lockdep warning

>  drivers/gpio/gpio-pca953x.c | 2 ++
>  1 file changed, 2 insertions(+)

FYI, my code checkers found this in this driver:

    SMATCH
drivers/gpio/gpio-pca953x.c:562 pca953x_irq_pending() error: buffer overflow 'cur_stat' 5 <= 8191
drivers/gpio/gpio-pca953x.c:573 pca953x_irq_pending() warn: buffer overflow 'old_stat' 5 <= 8191

Didn't check further. I fixed a sparse warning, though.


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