From mboxrd@z Thu Jan 1 00:00:00 1970 From: Suman Anna Subject: Re: [PATCH 1/4] gpio: davinci: Use devm_gpiochip_add_data in place of gpiochip_add_data Date: Tue, 18 Jul 2017 11:50:11 -0500 Message-ID: <0aa79585-c88e-e5b7-c260-6e9ceee6d776@ti.com> References: <1500375436-9435-1-git-send-email-j-keerthy@ti.com> <1500375436-9435-2-git-send-email-j-keerthy@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1500375436-9435-2-git-send-email-j-keerthy@ti.com> Content-Language: en-US Sender: linux-gpio-owner@vger.kernel.org To: Keerthy , linus.walleij@linaro.org, ssantosh@kernel.org Cc: robh+dt@kernel.org, nsekhar@ti.com, fcooper@ti.com, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org List-Id: devicetree@vger.kernel.org Hi Keerthy, On 07/18/2017 05:57 AM, Keerthy wrote: > Use the devm version of gpiochip_add_data and pass on the > return value. Reset the static variables to 0 before returning. > > Signed-off-by: Keerthy > --- > drivers/gpio/gpio-davinci.c | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c > index 65cb359..2c88054 100644 > --- a/drivers/gpio/gpio-davinci.c > +++ b/drivers/gpio/gpio-davinci.c > @@ -166,7 +166,7 @@ static int davinci_gpio_get(struct gpio_chip *chip, unsigned offset) > static int davinci_gpio_probe(struct platform_device *pdev) > { > static int ctrl_num, bank_base; > - int gpio, bank; > + int gpio, bank, ret = 0; > unsigned ngpio, nbank; > struct davinci_gpio_controller *chips; > struct davinci_gpio_platform_data *pdata; > @@ -232,7 +232,13 @@ static int davinci_gpio_probe(struct platform_device *pdev) > for (gpio = 0, bank = 0; gpio < ngpio; gpio += 32, bank++) > chips->regs[bank] = gpio_base + offset_array[bank]; > > - gpiochip_add_data(&chips->chip, chips); > + ret = devm_gpiochip_add_data(dev, &chips->chip, chips); > + if (ret) { > + ctrl_num = 0; > + bank_base = 0; Hmm, this doesn't look right to me. These variables are defined as static, and you are resetting them unconditionally. This should be an issue when you have multiple devices and one of them fails. regards Suman > + return ret; > + } > + > platform_set_drvdata(pdev, chips); > davinci_gpio_irq_setup(pdev); > return 0; >