| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20200522082208.383631-1-alexandru.ardelean@analog.com>
Date: Fri, 22 May 2020 11:22:04 +0300
From: Alexandru Ardelean <alexandru.ardelean@...log.com>
To: <bcm-kernel-feedback-list@...adcom.com>,
<linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-stm32@...md-mailman.stormreply.com>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-input@...r.kernel.org>, <linux-aspeed@...ts.ozlabs.org>,
<linux-samsung-soc@...r.kernel.org>,
<linux-amlogic@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
<linux-arm-msm@...r.kernel.org>,
<linux-rockchip@...ts.infradead.org>, <linux-pm@...r.kernel.org>,
<platform-driver-x86@...r.kernel.org>, <devel@...verdev.osuosl.org>
CC: <vilhelm.gray@...il.com>, <syednwaris@...il.com>,
<fabrice.gasnier@...com>, <mcoquelin.stm32@...il.com>,
<alexandre.torgue@...com>, <jic23@...nel.org>,
<dan@...obertson.com>, <jikos@...nel.org>,
<srinivas.pandruvada@...ux.intel.com>, <linus.walleij@...aro.org>,
<wens@...e.org>, <hdegoede@...hat.com>, <rjui@...adcom.com>,
<sbranden@...adcom.com>, <peda@...ntia.se>, <kgene@...nel.org>,
<krzk@...nel.org>, <shawnguo@...nel.org>, <s.hauer@...gutronix.de>,
<ak@...klinger.de>, <paul@...pouillou.net>, <milo.kim@...com>,
<vz@...ia.com>, <slemieux.tyco@...il.com>, <khilman@...libre.com>,
<matthias.bgg@...il.com>, <agross@...nel.org>,
<bjorn.andersson@...aro.org>, <heiko@...ech.de>,
<orsonzhai@...il.com>, <baolin.wang7@...il.com>,
<zhang.lyra@...il.com>, <mripard@...nel.org>, <tduszyns@...il.com>,
<rmfrfs@...il.com>, <lorenzo.bianconi83@...il.com>,
<ktsai@...ellamicro.com>, <songqiang1304521@...il.com>,
<tomislav.denis@....com>, <eajames@...ux.ibm.com>,
<dmitry.torokhov@...il.com>, <coproscefalo@...il.com>,
Alexandru Ardelean <alexandru.ardelean@...log.com>
Subject: [PATCH 1/5] iio: core: pass parent device as parameter during allocation
The change passes the parent device to the iio_device_alloc() call. This
also updates the devm_iio_device_alloc() call to consider the device object
as the parent device by default.
Having it passed like this, should ensure that any IIO device object
already has a device object as parent, allowing for neater control, like
passing the 'indio_dev' object for other stuff [like buffers/triggers/etc],
and potentially creating iiom_xxx(indio_dev) functions.
With this patch, only the 'drivers/platform/x86/toshiba_acpi.c' needs an
update to pass the parent object as a parameter.
In the next patch all devm_iio_device_alloc() calls will be handled.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
---
drivers/iio/dummy/iio_simple_dummy.c | 14 ++++++++------
drivers/iio/industrialio-core.c | 11 ++++++-----
drivers/platform/x86/toshiba_acpi.c | 3 +--
drivers/staging/iio/Documentation/device.txt | 4 +---
include/linux/iio/iio.h | 4 ++--
5 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/drivers/iio/dummy/iio_simple_dummy.c b/drivers/iio/dummy/iio_simple_dummy.c
index 6cb02299a215..b35ae7c039f7 100644
--- a/drivers/iio/dummy/iio_simple_dummy.c
+++ b/drivers/iio/dummy/iio_simple_dummy.c
@@ -566,6 +566,13 @@ static struct iio_sw_device *iio_dummy_probe(const char *name)
struct iio_dev *indio_dev;
struct iio_dummy_state *st;
struct iio_sw_device *swd;
+ struct device *parent = NULL;
+
+ /*
+ * With hardware: Set the parent device.
+ * parent = &spi->dev;
+ * parent = &client->dev;
+ */
swd = kzalloc(sizeof(*swd), GFP_KERNEL);
if (!swd) {
@@ -580,7 +587,7 @@ static struct iio_sw_device *iio_dummy_probe(const char *name)
* It also has a region (accessed by iio_priv()
* for chip specific state information.
*/
- indio_dev = iio_device_alloc(sizeof(*st));
+ indio_dev = iio_device_alloc(parent, sizeof(*st));
if (!indio_dev) {
ret = -ENOMEM;
goto error_ret;
@@ -590,11 +597,6 @@ static struct iio_sw_device *iio_dummy_probe(const char *name)
mutex_init(&st->lock);
iio_dummy_init_device(indio_dev);
- /*
- * With hardware: Set the parent device.
- * indio_dev->dev.parent = &spi->dev;
- * indio_dev->dev.parent = &client->dev;
- */
/*
* Make the iio_dev struct available to remove function.
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 1527f01a44f1..75661661aaba 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -1493,7 +1493,7 @@ struct device_type iio_device_type = {
* iio_device_alloc() - allocate an iio_dev from a driver
* @sizeof_priv: Space to allocate for private structure.
**/
-struct iio_dev *iio_device_alloc(int sizeof_priv)
+struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv)
{
struct iio_dev *dev;
size_t alloc_size;
@@ -1510,6 +1510,7 @@ struct iio_dev *iio_device_alloc(int sizeof_priv)
if (!dev)
return NULL;
+ dev->dev.parent = parent;
dev->dev.groups = dev->groups;
dev->dev.type = &iio_device_type;
dev->dev.bus = &iio_bus_type;
@@ -1551,7 +1552,7 @@ static void devm_iio_device_release(struct device *dev, void *res)
/**
* devm_iio_device_alloc - Resource-managed iio_device_alloc()
- * @dev: Device to allocate iio_dev for
+ * @parent: Device to allocate iio_dev for, and parent for this IIO device
* @sizeof_priv: Space to allocate for private structure.
*
* Managed iio_device_alloc. iio_dev allocated with this function is
@@ -1560,7 +1561,7 @@ static void devm_iio_device_release(struct device *dev, void *res)
* RETURNS:
* Pointer to allocated iio_dev on success, NULL on failure.
*/
-struct iio_dev *devm_iio_device_alloc(struct device *dev, int sizeof_priv)
+struct iio_dev *devm_iio_device_alloc(struct device *parent, int sizeof_priv)
{
struct iio_dev **ptr, *iio_dev;
@@ -1569,10 +1570,10 @@ struct iio_dev *devm_iio_device_alloc(struct device *dev, int sizeof_priv)
if (!ptr)
return NULL;
- iio_dev = iio_device_alloc(sizeof_priv);
+ iio_dev = iio_device_alloc(parent, sizeof_priv);
if (iio_dev) {
*ptr = iio_dev;
- devres_add(dev, ptr);
+ devres_add(parent, ptr);
} else {
devres_free(ptr);
}
diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index 808944546739..4a4d09c352dd 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -3128,7 +3128,7 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
toshiba_accelerometer_available(dev);
if (dev->accelerometer_supported) {
- dev->indio_dev = iio_device_alloc(sizeof(*dev));
+ dev->indio_dev = iio_device_alloc(&acpi_dev->dev, sizeof(*dev));
if (!dev->indio_dev) {
pr_err("Unable to allocate iio device\n");
goto iio_error;
@@ -3138,7 +3138,6 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
dev->indio_dev->info = &toshiba_iio_accel_info;
dev->indio_dev->name = "Toshiba accelerometer";
- dev->indio_dev->dev.parent = &acpi_dev->dev;
dev->indio_dev->modes = INDIO_DIRECT_MODE;
dev->indio_dev->channels = toshiba_iio_accel_channels;
dev->indio_dev->num_channels =
diff --git a/drivers/staging/iio/Documentation/device.txt b/drivers/staging/iio/Documentation/device.txt
index ec42544a46aa..0d1275b1eb3f 100644
--- a/drivers/staging/iio/Documentation/device.txt
+++ b/drivers/staging/iio/Documentation/device.txt
@@ -8,7 +8,7 @@ The crucial structure for device drivers in iio is iio_dev.
First allocate one using:
-struct iio_dev *indio_dev = iio_device_alloc(sizeof(struct chip_state));
+struct iio_dev *indio_dev = iio_device_alloc(parent, sizeof(struct chip_state));
where chip_state is a structure of local state data for this instance of
the chip.
@@ -16,8 +16,6 @@ That data can be accessed using iio_priv(struct iio_dev *).
Then fill in the following:
-- indio_dev->dev.parent
- Struct device associated with the underlying hardware.
- indio_dev->name
Name of the device being driven - made available as the name
attribute in sysfs.
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index a1be82e74c93..91a69f4751aa 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -676,7 +676,7 @@ static inline void *iio_device_get_drvdata(struct iio_dev *indio_dev)
/* Can we make this smaller? */
#define IIO_ALIGN L1_CACHE_BYTES
-struct iio_dev *iio_device_alloc(int sizeof_priv);
+struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv);
static inline void *iio_priv(const struct iio_dev *indio_dev)
{
@@ -690,7 +690,7 @@ static inline struct iio_dev *iio_priv_to_dev(void *priv)
}
void iio_device_free(struct iio_dev *indio_dev);
-struct iio_dev *devm_iio_device_alloc(struct device *dev, int sizeof_priv);
+struct iio_dev *devm_iio_device_alloc(struct device *parent, int sizeof_priv);
struct iio_trigger *devm_iio_trigger_alloc(struct device *dev,
const char *fmt, ...);
/**
--
2.25.1
Powered by blists - more mailing lists