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authorHans Verkuil <hverkuil@xs4all.nl>2017-02-20 23:21:19 +0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-03-22 17:12:34 +0300
commit491314b8d41bb680f6ddb2632c1a36dd3959d5b3 (patch)
tree3a58b7cada36c682b8bfa155d841adfffc75d404
parent059d1460cacb7e1ee499a02d92ac2b0b84d310fc (diff)
downloadlinux-491314b8d41bb680f6ddb2632c1a36dd3959d5b3.tar.xz
[media] cec: document the error codes
Document all the various error codes returned by the CEC ioctls. These were never documented, instead the documentation relied on a reference to the generic error codes, but that's not sufficient. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
-rw-r--r--Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst13
-rw-r--r--Documentation/media/uapi/cec/cec-ioc-adap-g-phys-addr.rst13
-rw-r--r--Documentation/media/uapi/cec/cec-ioc-dqevent.rst11
-rw-r--r--Documentation/media/uapi/cec/cec-ioc-g-mode.rst12
-rw-r--r--Documentation/media/uapi/cec/cec-ioc-receive.rst37
5 files changed, 86 insertions, 0 deletions
diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst
index 09f09bbe28d4..fcf863ab6f43 100644
--- a/Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst
+++ b/Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst
@@ -351,3 +351,16 @@ On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
+The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` can return the following
+error codes:
+
+ENOTTY
+ The ``CEC_CAP_LOG_ADDRS`` capability wasn't set, so this ioctl is not supported.
+
+EBUSY
+ The CEC adapter is currently configuring itself, or it is already configured and
+ ``num_log_addrs`` is non-zero, or another filehandle is in exclusive follower or
+ initiator mode, or the filehandle is in mode ``CEC_MODE_NO_INITIATOR``.
+
+EINVAL
+ The contents of struct :c:type:`cec_log_addrs` is invalid.
diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-phys-addr.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-phys-addr.rst
index a3cdc75cec3e..9e49d4be35d5 100644
--- a/Documentation/media/uapi/cec/cec-ioc-adap-g-phys-addr.rst
+++ b/Documentation/media/uapi/cec/cec-ioc-adap-g-phys-addr.rst
@@ -78,3 +78,16 @@ Return Value
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
+
+The :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` can return the following
+error codes:
+
+ENOTTY
+ The ``CEC_CAP_PHYS_ADDR`` capability wasn't set, so this ioctl is not supported.
+
+EBUSY
+ Another filehandle is in exclusive follower or initiator mode, or the filehandle
+ is in mode ``CEC_MODE_NO_INITIATOR``.
+
+EINVAL
+ The physical address is malformed.
diff --git a/Documentation/media/uapi/cec/cec-ioc-dqevent.rst b/Documentation/media/uapi/cec/cec-ioc-dqevent.rst
index 89ef6c1a2e42..4d3570c2e0b3 100644
--- a/Documentation/media/uapi/cec/cec-ioc-dqevent.rst
+++ b/Documentation/media/uapi/cec/cec-ioc-dqevent.rst
@@ -174,3 +174,14 @@ Return Value
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
+
+The :ref:`ioctl CEC_DQEVENT <CEC_DQEVENT>` can return the following
+error codes:
+
+EAGAIN
+ This is returned when the filehandle is in non-blocking mode and there
+ are no pending events.
+
+ERESTARTSYS
+ An interrupt (e.g. Ctrl-C) arrived while in blocking mode waiting for
+ events to arrive.
diff --git a/Documentation/media/uapi/cec/cec-ioc-g-mode.rst b/Documentation/media/uapi/cec/cec-ioc-g-mode.rst
index e4ded9df0a84..664f0d47bbcd 100644
--- a/Documentation/media/uapi/cec/cec-ioc-g-mode.rst
+++ b/Documentation/media/uapi/cec/cec-ioc-g-mode.rst
@@ -249,3 +249,15 @@ Return Value
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
+
+The :ref:`ioctl CEC_S_MODE <CEC_S_MODE>` can return the following
+error codes:
+
+EINVAL
+ The requested mode is invalid.
+
+EPERM
+ Monitor mode is requested without having root permissions
+
+EBUSY
+ Someone else is already an exclusive follower or initiator.
diff --git a/Documentation/media/uapi/cec/cec-ioc-receive.rst b/Documentation/media/uapi/cec/cec-ioc-receive.rst
index f8a28c303ade..3ce7307f55fa 100644
--- a/Documentation/media/uapi/cec/cec-ioc-receive.rst
+++ b/Documentation/media/uapi/cec/cec-ioc-receive.rst
@@ -289,3 +289,40 @@ Return Value
On success 0 is returned, on error -1 and the ``errno`` variable is set
appropriately. The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.
+
+The :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>` can return the following
+error codes:
+
+EAGAIN
+ No messages are in the receive queue, and the filehandle is in non-blocking mode.
+
+ETIMEDOUT
+ The ``timeout`` was reached while waiting for a message.
+
+ERESTARTSYS
+ The wait for a message was interrupted (e.g. by Ctrl-C).
+
+The :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` can return the following
+error codes:
+
+ENOTTY
+ The ``CEC_CAP_TRANSMIT`` capability wasn't set, so this ioctl is not supported.
+
+EPERM
+ The CEC adapter is not configured, i.e. :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+ has never been called.
+
+ENONET
+ The CEC adapter is not configured, i.e. :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+ was called, but the physical address is invalid so no logical address was claimed.
+
+EBUSY
+ Another filehandle is in exclusive follower or initiator mode, or the filehandle
+ is in mode ``CEC_MODE_NO_INITIATOR``. This is also returned if the transmit
+ queue is full.
+
+EINVAL
+ The contents of struct :c:type:`cec_msg` is invalid.
+
+ERESTARTSYS
+ The wait for a successful transmit was interrupted (e.g. by Ctrl-C).