From: Remi Pommarel <repk@triplefau.lt>
To: Jonathan Cameron <jic23@kernel.org>,
Hartmut Knaack <knaack.h@gmx.de>,
Lars-Peter Clausen <lars@metafoo.de>,
Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
Kevin Hilman <khilman@baylibre.com>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
Neil Armstrong <narmstrong@baylibre.com>,
linux-iio@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org,
Remi Pommarel <repk@triplefau.lt>,
Elie Roudninski <xademax@gmail.com>
Subject: [PATCH] iio: adc: meson_saradc: Fix memory allocation order
Date: Sun, 1 Sep 2019 12:54:10 +0200 [thread overview]
Message-ID: <20190901105410.23567-1-repk@triplefau.lt> (raw)
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.
Reported-by: Elie Roudninski <xademax@gmail.com>
Signed-off-by: Remi Pommarel <repk@triplefau.lt>
---
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 7b28d045d271..7b27306330a3 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -1219,6 +1219,11 @@ 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->param->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;
@@ -1228,11 +1233,6 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
if (ret)
return ret;
- priv->regmap = devm_regmap_init_mmio(&pdev->dev, base,
- priv->param->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");
--
2.20.1
next reply other threads:[~2019-09-01 10:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-01 10:54 Remi Pommarel [this message]
2019-09-01 11:29 ` [PATCH] iio: adc: meson_saradc: Fix memory allocation order Martin Blumenstingl
2019-09-02 20:40 ` Elie Roudninski
2019-09-08 11:33 ` Jonathan Cameron
2019-09-05 0:02 ` Kevin Hilman
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