linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2013-07-20	iio:trigger: Fix use_count race condition	Lars-Peter Clausen	1	-12/+22
	When using more than one trigger consumer it can happen that multiple threads perform a read-modify-update cycle on 'use_count' concurrently. This can cause updates to be lost and use_count can get stuck at non-zero value, in which case the IIO core assumes that at least one thread is still running and will wait for it to finish before running any trigger handlers again. This effectively renders the trigger disabled and a reboot is necessary before it can be used again. To fix this make use_count an atomic variable. Also set it to the number of consumers before starting the first consumer, otherwise it might happen that use_count drops to 0 even though not all consumers have been run yet. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Tested-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2013-06-29	iio:trigger: device_unregister->device_del to avoid double free	Jonathan Cameron	1	-1/+1
	iio_trigger unregistration and freeing has been separated in this code for some time, but it looks like the calls to the device handling were not appropriately updated. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Reported-by: Otavio Salvador <otavio@ossystems.com.br> Tested-by: Otavio Salvador <otavio@ossystems.com.br> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
2013-02-06	iio: tweak language in industrialio-trigger comments	Peter Meerwald	1	-6/+6
	Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-08	iio:trigger: Register sysfs file statically	Lars-Peter Clausen	1	-25/+13
	The name sysfs attribute is the same for all triggers, so there is no need to register them dynamically at runtime. Create a attribute group for it and set it up for the bus attribute group. This also avoids a possible race condition where the uevent for the device is sent before the name sysfs attribute has been added. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-07-07	iio: fix spelling of detach in static func	Peter Meerwald	1	-2/+2
	Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2012-06-22	iio:trigger: Use to_iio_trigger() instead of dev_get_drvdata()	Lars-Peter Clausen	1	-2/+1
	Use to_iio_trigger(dev) instead of dev_get_drvdata(dev). Both will return the trigger which belongs to the device, but the the first on is a bit more lightweight. Since this is the last location where we used dev_get_drvdata() for retrieving the trigger there is no need anymore to assign the the trigger to the devices drvdata, so we can remove that as well. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-14	iio: Use dev_to_iio_dev()	Lars-Peter Clausen	1	-2/+2
	Replace open-coded instances of getting a iio_dev struct from a device struct with dev_to_iio_dev(). Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-04-29	staging:iio: Streamline API function naming	Lars-Peter Clausen	1	-7/+7
	Currently we use two different naming schemes in the IIO API, iio_verb_object and iio_object_verb. E.g iio_device_register and iio_allocate_device. This patches renames instances of the later to the former. The patch also renames allocate to alloc as this seems to be the preferred form throughout the kernel. In particular the following renames are performed by the patch: iio_put_device -> iio_device_put iio_allocate_device -> iio_device_alloc iio_free_device -> iio_device_free iio_get_trigger -> iio_trigger_get iio_put_trigger -> iio_trigger_put iio_allocate_trigger -> iio_trigger_alloc iio_free_trigger -> iio_trigger_free The conversion was done with the following coccinelle patch with manual fixes to comments and documentation. <smpl> @@ @@ -iio_put_device +iio_device_put @@ @@ -iio_allocate_device +iio_device_alloc @@ @@ -iio_free_device +iio_device_free @@ @@ -iio_get_trigger +iio_trigger_get @@ @@ -iio_put_trigger +iio_trigger_put @@ @@ -iio_allocate_trigger +iio_trigger_alloc @@ @@ -iio_free_trigger +iio_trigger_free </smpl> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-04-25	IIO: Move the core files to drivers/iio	Jonathan Cameron	1	-0/+509
	Take the core support + the kfifo buffer implentation out of staging. Whilst we are far from done in improving this subsystem it is now at a stage where the userspae interfaces (provided by the core) can be considered stable. Drivers will follow over a longer time scale. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>