All of lore.kernel.org
 help / color / mirror / Atom feed
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


WARNING: multiple messages have this Message-ID (diff)
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: Neil Armstrong <narmstrong@baylibre.com>,
	Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
	Elie Roudninski <xademax@gmail.com>,
	linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org,
	Remi Pommarel <repk@triplefau.lt>,
	linux-amlogic@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org
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


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
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: Neil Armstrong <narmstrong@baylibre.com>,
	Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
	Elie Roudninski <xademax@gmail.com>,
	linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org,
	Remi Pommarel <repk@triplefau.lt>,
	linux-amlogic@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org
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


_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic

             reply	other threads:[~2019-09-01 10:46 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-01 10:54 Remi Pommarel [this message]
2019-09-01 10:54 ` [PATCH] iio: adc: meson_saradc: Fix memory allocation order Remi Pommarel
2019-09-01 10:54 ` Remi Pommarel
2019-09-01 11:29 ` Martin Blumenstingl
2019-09-01 11:29   ` Martin Blumenstingl
2019-09-01 11:29   ` Martin Blumenstingl
2019-09-02 20:40   ` Elie Roudninski
2019-09-02 20:40     ` Elie Roudninski
2019-09-02 20:40     ` Elie Roudninski
2019-09-08 11:33     ` Jonathan Cameron
2019-09-08 11:33       ` Jonathan Cameron
2019-09-08 11:33       ` Jonathan Cameron
2019-09-05  0:02 ` Kevin Hilman
2019-09-05  0:02   ` Kevin Hilman
2019-09-05  0:02   ` Kevin Hilman

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190901105410.23567-1-repk@triplefau.lt \
    --to=repk@triplefau.lt \
    --cc=jic23@kernel.org \
    --cc=khilman@baylibre.com \
    --cc=knaack.h@gmx.de \
    --cc=lars@metafoo.de \
    --cc=linux-amlogic@lists.infradead.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-iio@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=martin.blumenstingl@googlemail.com \
    --cc=narmstrong@baylibre.com \
    --cc=pmeerw@pmeerw.net \
    --cc=xademax@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.