From: Baolin Wang <baolin.wang7@gmail.com>
To: Lee Jones <lee.jones@linaro.org>
Cc: Orson Zhai <orsonzhai@gmail.com>, Johan Hovold <johan@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-arm-kernel@lists.infradead.org,
Chunyan Zhang <zhang.lyra@gmail.com>
Subject: Re: [PATCH] mfd: sprd-sc27xx-spi: Fix-up bogus IRQ register offset and mask setting
Date: Wed, 1 Jul 2020 22:10:19 +0800 [thread overview]
Message-ID: <CADBw62pFb6aEegTRXS3Y9DeJDTrW4mSHND4nw4p8Qtv-Yk+SNg@mail.gmail.com> (raw)
In-Reply-To: <20200701091518.GW1179328@dell>
On Wed, Jul 1, 2020 at 5:15 PM Lee Jones <lee.jones@linaro.org> wrote:
>
> 'i / pdata->num_irqs' always equates to 0 and 'BIT(i % pdata->num_irqs)'
> always ends up being BIT(i) here, so make that clearer in the code. If
> the code base needs to support more than 32 IRQs in the future, this will
> have to be reworked, but lets just keep it simple for as long as we can.
>
> This fixes the following W=1 warning:
>
> drivers/mfd/sprd-sc27xx-spi.c:255 sprd_pmic_probe() debug: sval_binop_unsigned: divide by zero
>
> Cc: Orson Zhai <orsonzhai@gmail.com>
> Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> Cc: Johan Hovold <johan@kernel.org>
> Suggested-by: Baolin Wang <baolin.wang7@gmail.com>
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Thanks.
Reviewed-by: Baolin Wang <baolin.wang7@gmail.com>
>
> diff --git a/drivers/mfd/sprd-sc27xx-spi.c b/drivers/mfd/sprd-sc27xx-spi.c
> index c305e941e435c..4a1a61e1a86ea 100644
> --- a/drivers/mfd/sprd-sc27xx-spi.c
> +++ b/drivers/mfd/sprd-sc27xx-spi.c
> @@ -251,10 +251,8 @@ static int sprd_pmic_probe(struct spi_device *spi)
> return -ENOMEM;
>
> ddata->irq_chip.irqs = ddata->irqs;
> - for (i = 0; i < pdata->num_irqs; i++) {
> - ddata->irqs[i].reg_offset = i / pdata->num_irqs;
> - ddata->irqs[i].mask = BIT(i % pdata->num_irqs);
> - }
> + for (i = 0; i < pdata->num_irqs; i++)
> + ddata->irqs[i].mask = BIT(i);
>
> ret = devm_regmap_add_irq_chip(&spi->dev, ddata->regmap, ddata->irq,
> IRQF_ONESHOT | IRQF_NO_SUSPEND, 0,
--
Baolin Wang
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next prev parent reply other threads:[~2020-07-01 14:10 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 12:32 [PATCH 0/5] Last batch of W=1 warning fixes in MFD Lee Jones
2020-06-29 12:32 ` [PATCH 1/5] mfd: si476x-cmd: Add missing documentation for si476x_cmd_fm_rds_status()'s arg 'report' Lee Jones
2020-06-29 12:32 ` [PATCH 2/5] mfd: lm3533-ctrlbank: Cap BRIGHTNESS_MAX to 127 since API uses u8 as carrier Lee Jones
2020-06-29 12:51 ` Johan Hovold
2020-06-29 13:25 ` Lee Jones
2020-06-30 8:38 ` Johan Hovold
2020-06-29 12:32 ` [PATCH 3/5] mfd: rave-sp: Fix mistake in 'struct rave_sp_deframer's kerneldoc Lee Jones
2020-06-29 12:32 ` [PATCH 4/5] mfd: sprd-sc27xx-spi: Fix divide by zero when allocating register offset/mask Lee Jones
2020-06-29 13:06 ` Johan Hovold
2020-06-29 14:01 ` Lee Jones
2020-06-29 14:35 ` Baolin Wang
2020-06-29 14:43 ` Johan Hovold
2020-06-29 15:08 ` Baolin Wang
2020-06-29 15:45 ` Lee Jones
2020-07-01 9:15 ` [PATCH] mfd: sprd-sc27xx-spi: Fix-up bogus IRQ register offset and mask setting Lee Jones
2020-07-01 14:10 ` Baolin Wang [this message]
2020-06-29 12:32 ` [PATCH 5/5] mfd: axp20x-i2c: Do not define 'struct acpi_device_id' when !CONFIG_ACPI Lee Jones
2020-06-29 15:38 ` Chen-Yu Tsai
2020-07-06 7:31 ` Lee Jones
2020-07-01 6:59 ` [PATCH v2] mfd: axp20x-i2c: Tell the compiler that ACPI functions may not be used Lee Jones
2020-07-01 8:38 ` Chen-Yu Tsai
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