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From: Thierry Reding <thierry.reding@gmail.com>

To: Lee Jones <lee.jones@linaro.org>

Subject: [PATCH] mfd: max77620: Do not allocate IRQs upfront

Date: Wed,  2 Oct 2019 16:43:18 +0200

Message-Id: <20191002144318.140365-1-thierry.reding@gmail.com>

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From: Thierry Reding <treding@nvidia.com>

regmap_add_irq_chip() will try to allocate all of the IRQ descriptors

upfront if passed a non-zero irq_base parameter. However, the intention

is to allocate IRQ descriptors on an as-needed basis if possible. Pass 0

instead of -1 to fix that use-case.

Signed-off-by: Thierry Reding <treding@nvidia.com>

---

 drivers/mfd/max77620.c       | 5 ++---

 include/linux/mfd/max77620.h | 1 -

 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c

index a851ff473a44..c7ed5c353553 100644

--- a/drivers/mfd/max77620.c

+++ b/drivers/mfd/max77620.c

@@ -507,7 +507,6 @@ static int max77620_probe(struct i2c_client *client,

 	i2c_set_clientdata(client, chip);

 	chip->dev = &client->dev;

-	chip->irq_base = -1;

 	chip->chip_irq = client->irq;

 	chip->chip_id = (enum max77620_chip_id)id->driver_data;

@@ -545,8 +544,8 @@ static int max77620_probe(struct i2c_client *client,

 	max77620_top_irq_chip.irq_drv_data = chip;

 	ret = devm_regmap_add_irq_chip(chip->dev, chip->rmap, client->irq,

-				       IRQF_ONESHOT | IRQF_SHARED,

-				       chip->irq_base, &max77620_top_irq_chip,

+				       IRQF_ONESHOT | IRQF_SHARED, 0,

+				       &max77620_top_irq_chip,

 				       &chip->top_irq_data);

 	if (ret < 0) {

 		dev_err(chip->dev, "Failed to add regmap irq: %d\n", ret);

diff --git a/include/linux/mfd/max77620.h b/include/linux/mfd/max77620.h

index 12ba157cb83f..f552ef5b1100 100644

--- a/include/linux/mfd/max77620.h

+++ b/include/linux/mfd/max77620.h

@@ -329,7 +329,6 @@ struct max77620_chip {

 	struct regmap *rmap;

 	int chip_irq;

-	int irq_base;

 	/* chip id */

 	enum max77620_chip_id chip_id;