From: Remi Pommarel repk@triplefau.lt
[ Upstream commit de10ac47597e7a3596b27631d0d5ce5f48d2c099 ]
meson_saradc's irq handler uses priv->regmap so make sure that it is allocated before the irq get enabled.
This also fixes crash when CONFIG_DEBUG_SHIRQ is enabled, as device managed resources are freed in the inverted order they had been allocated, priv->regmap was freed before the spurious fake irq that CONFIG_DEBUG_SHIRQ adds called the handler.
Fixes: 3af109131b7eb8 ("iio: adc: meson-saradc: switch from polling to interrupt mode") Reported-by: Elie Roudninski xademax@gmail.com Signed-off-by: Remi Pommarel repk@triplefau.lt Reviewed-by: Martin Blumenstingl martin.blumenstingl@googlemail.com Tested-by: Elie ROUDNINSKI xademax@gmail.com Reviewed-by: Kevin Hilman khilman@baylibre.com Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/adc/meson_saradc.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c index 2515badf8b280..9b2121f249263 100644 --- a/drivers/iio/adc/meson_saradc.c +++ b/drivers/iio/adc/meson_saradc.c @@ -976,6 +976,11 @@ static int meson_sar_adc_probe(struct platform_device *pdev) if (IS_ERR(base)) return PTR_ERR(base);
+ priv->regmap = devm_regmap_init_mmio(&pdev->dev, base, + priv->data->regmap_config); + if (IS_ERR(priv->regmap)) + return PTR_ERR(priv->regmap); + irq = irq_of_parse_and_map(pdev->dev.of_node, 0); if (!irq) return -EINVAL; @@ -985,11 +990,6 @@ static int meson_sar_adc_probe(struct platform_device *pdev) if (ret) return ret;
- priv->regmap = devm_regmap_init_mmio(&pdev->dev, base, - priv->data->regmap_config); - if (IS_ERR(priv->regmap)) - return PTR_ERR(priv->regmap); - priv->clkin = devm_clk_get(&pdev->dev, "clkin"); if (IS_ERR(priv->clkin)) { dev_err(&pdev->dev, "failed to get clkin\n");