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authorLars-Peter Clausen <lars@metafoo.de>2013-09-18 21:02:00 +0100
committerJonathan Cameron <jic23@kernel.org>2013-09-21 12:36:30 +0100
commita87c82e454f184a9473f8cdfd4d304205f585f65 (patch)
tree5f158830b28d740e6782dac2683fd46cde7b23fb /drivers/iio
parentd66e0452bf6b0d98cd1a478918c92f2baffcb413 (diff)
downloadlinux-a87c82e454f184a9473f8cdfd4d304205f585f65.tar.bz2
iio: Stop sampling when the device is removed
Make sure to stop sampling when the device is removed, otherwise it will continue to sample forever. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/iio_core.h4
-rw-r--r--drivers/iio/industrialio-buffer.c19
-rw-r--r--drivers/iio/industrialio-core.c6
3 files changed, 28 insertions, 1 deletions
diff --git a/drivers/iio/iio_core.h b/drivers/iio/iio_core.h
index 05c1b74502a3..9b32253b824b 100644
--- a/drivers/iio/iio_core.h
+++ b/drivers/iio/iio_core.h
@@ -49,11 +49,15 @@ ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
#define iio_buffer_poll_addr (&iio_buffer_poll)
#define iio_buffer_read_first_n_outer_addr (&iio_buffer_read_first_n_outer)
+void iio_disable_all_buffers(struct iio_dev *indio_dev);
+
#else
#define iio_buffer_poll_addr NULL
#define iio_buffer_read_first_n_outer_addr NULL
+static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {}
+
#endif
int iio_device_register_eventset(struct iio_dev *indio_dev);
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index 5862c88ed5ad..2710f7245c3b 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -460,6 +460,25 @@ static int iio_compute_scan_bytes(struct iio_dev *indio_dev, const long *mask,
return bytes;
}
+void iio_disable_all_buffers(struct iio_dev *indio_dev)
+{
+ struct iio_buffer *buffer, *_buffer;
+
+ if (list_empty(&indio_dev->buffer_list))
+ return;
+
+ if (indio_dev->setup_ops->predisable)
+ indio_dev->setup_ops->predisable(indio_dev);
+
+ list_for_each_entry_safe(buffer, _buffer,
+ &indio_dev->buffer_list, buffer_list)
+ list_del_init(&buffer->buffer_list);
+
+ indio_dev->currentmode = INDIO_DIRECT_MODE;
+ if (indio_dev->setup_ops->postdisable)
+ indio_dev->setup_ops->postdisable(indio_dev);
+}
+
int iio_update_buffers(struct iio_dev *indio_dev,
struct iio_buffer *insert_buffer,
struct iio_buffer *remove_buffer)
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 97f0297b120f..2cc0778a7328 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -1078,9 +1078,13 @@ EXPORT_SYMBOL(iio_device_register);
void iio_device_unregister(struct iio_dev *indio_dev)
{
mutex_lock(&indio_dev->info_exist_lock);
+
+ device_del(&indio_dev->dev);
+
+ iio_disable_all_buffers(indio_dev);
+
indio_dev->info = NULL;
mutex_unlock(&indio_dev->info_exist_lock);
- device_del(&indio_dev->dev);
}
EXPORT_SYMBOL(iio_device_unregister);
subsys_initcall(iio_init);