Fix two mistakes in the PCM interface section: 1/ Members of the snd_pcm_hardware structure are channels_{min,max} and not channel_{min,max} (mind the 's'). 2/ Another sentence is incomplete as the reference to one structure member (period_bytes_max) is missing.

There is no relevant 'Fixes:' tag to apply as both typos predate the Git era.

Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com ---

Hello, I wrote and sent this patch in 2019 but I likely only Cc'd Jon and the doc ML, which might have not been enough, so just in case, here is a resend. Link: https://lore.kernel.org/linux-doc/20190829145512.3752-1-miquel.raynal@bootli...

.../sound/kernel-api/writing-an-alsa-driver.rst | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/Documentation/sound/kernel-api/writing-an-alsa-driver.rst b/Documentation/sound/kernel-api/writing-an-alsa-driver.rst index 07a620c5ca74..5c9523b7d55c 100644 --- a/Documentation/sound/kernel-api/writing-an-alsa-driver.rst +++ b/Documentation/sound/kernel-api/writing-an-alsa-driver.rst @@ -1720,16 +1720,16 @@ Typically, you'll have a hardware descriptor as below: - ``rate_min`` and ``rate_max`` define the minimum and maximum sample rate. This should correspond somehow to ``rates`` bits.

-- ``channel_min`` and ``channel_max`` define, as you might already +- ``channels_min`` and ``channels_max`` define, as you might already expected, the minimum and maximum number of channels.

- ``buffer_bytes_max`` defines the maximum buffer size in bytes. There is no ``buffer_bytes_min`` field, since it can be calculated from the minimum period size and the minimum number of - periods. Meanwhile, ``period_bytes_min`` and define the minimum and - maximum size of the period in bytes. ``periods_max`` and - ``periods_min`` define the maximum and minimum number of periods in - the buffer. + periods. Meanwhile, ``period_bytes_min`` and ``period_bytes_max`` + define the minimum and maximum size of the period in bytes. + ``periods_max`` and ``periods_min`` define the maximum and minimum + number of periods in the buffer.

The “period” is a term that corresponds to a fragment in the OSS world. The period defines the size at which a PCM interrupt is