Commit e6c2076b authored by Phil Reid's avatar Phil Reid Committed by Greg Kroah-Hartman

pinctrl: mcp23s08: Fix add_data and irqchip_add_nested call order

[ Upstream commit 6dbc6e6f ]

Currently probing of the mcp23s08 results in an error message
"detected irqchip that is shared with multiple gpiochips:
please fix the driver"

This is due to the following:

Call to mcp23s08_irqchip_setup() with call hierarchy:
mcp23s08_irqchip_setup()
  gpiochip_irqchip_add_nested()
    gpiochip_irqchip_add_key()
      gpiochip_set_irq_hooks()

Call to devm_gpiochip_add_data() with call hierarchy:
devm_gpiochip_add_data()
  gpiochip_add_data_with_key()
    gpiochip_add_irqchip()
      gpiochip_set_irq_hooks()

The gpiochip_add_irqchip() returns immediately if there isn't a irqchip
but we added a irqchip due to the previous mcp23s08_irqchip_setup()
call. So it calls gpiochip_set_irq_hooks() a second time.

Fix this by moving the call to devm_gpiochip_add_data before
the call to mcp23s08_irqchip_setup

Fixes: 02e389e6 ("pinctrl: mcp23s08: fix irq setup order")
Suggested-by: default avatarMarco Felsch <m.felsch@pengutronix.de>
Signed-off-by: default avatarPhil Reid <preid@electromag.com.au>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent aa08b940
......@@ -881,6 +881,10 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
if (ret < 0)
goto fail;
ret = devm_gpiochip_add_data(dev, &mcp->chip, mcp);
if (ret < 0)
goto fail;
mcp->irq_controller =
device_property_read_bool(dev, "interrupt-controller");
if (mcp->irq && mcp->irq_controller) {
......@@ -922,10 +926,6 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
goto fail;
}
ret = devm_gpiochip_add_data(dev, &mcp->chip, mcp);
if (ret < 0)
goto fail;
if (one_regmap_config) {
mcp->pinctrl_desc.name = devm_kasprintf(dev, GFP_KERNEL,
"mcp23xxx-pinctrl.%d", raw_chip_address);
......
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