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60c2820d0f
The name of the subsystem is "media", and not "linux_tv". Also, as we plan to add other stuff there in the future, let's rename also the media uAPI book to media_uapi, to make it clearer. No functional changes. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
66 lines
1.2 KiB
ReStructuredText
66 lines
1.2 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _FE_READ_UNCORRECTED_BLOCKS:
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**************************
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FE_READ_UNCORRECTED_BLOCKS
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**************************
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Name
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====
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FE_READ_UNCORRECTED_BLOCKS
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Synopsis
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========
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.. cpp:function:: int ioctl( int fd, int request =FE_READ_UNCORRECTED_BLOCKS, uint32_t *ublocks)
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Arguments
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=========
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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- .. row 1
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- int fd
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- File descriptor returned by a previous call to open().
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- .. row 2
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- int request
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- Equals
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:ref:`FE_READ_UNCORRECTED_BLOCKS`
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for this command.
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- .. row 3
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- uint32_t \*ublocks
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- The total number of uncorrected blocks seen by the driver so far.
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Description
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===========
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This ioctl call returns the number of uncorrected blocks detected by the
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device driver during its lifetime. For meaningful measurements, the
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increment in block count during a specific time interval should be
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calculated. For this command, read-only access to the device is
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sufficient.
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Return Value
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============
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On success 0 is returned, on error -1 and the ``errno`` variable is set
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appropriately. The generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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