[PATCH 7/7] af9013 empty buffer overflow command.

[PATCH 7/7] af9013 empty buffer overflow command.

[Malcolm Priestley]

This command is present in other Afatech devices zeroing bit 7
seems to force streaming output even if it isn't one.

I was considering timing it out, but it seems to have no harmful effect
on streaming output.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
---
 drivers/media/dvb/frontends/af9013.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/media/dvb/frontends/af9013.c b/drivers/media/dvb/frontends/af9013.c
index 6a5b40c..fbf6bca 100644
--- a/drivers/media/dvb/frontends/af9013.c
+++ b/drivers/media/dvb/frontends/af9013.c
@@ -1094,7 +1094,10 @@ static int af9013_read_status(struct dvb_frontend *fe, fe_status_t *status)
 	}
 
 	ret = af9013_update_statistics(fe);
-
+	if (ret)
+		goto error;
+	/* Force empty stream buffer if overflow */
+	ret = af9013_write_reg_bits(state, 0xd500, 7, 1, 0);
 error:
 	return ret;
 }
-- 
1.7.5.4

Re: [PATCH 7/7] af9013 empty buffer overflow command.

[Antti Palosaari]

On 11/12/2011 05:56 PM, Malcolm Priestley wrote:
> This command is present in other Afatech devices zeroing bit 7
> seems to force streaming output even if it isn't one.
>
> I was considering timing it out, but it seems to have no harmful effect
> on streaming output.

You didn't find any reason this makes sense?

regards
Antti


>
> Signed-off-by: Malcolm Priestley<tvboxspy@gmail.com>
> ---
>   drivers/media/dvb/frontends/af9013.c |    5 ++++-
>   1 files changed, 4 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/media/dvb/frontends/af9013.c b/drivers/media/dvb/frontends/af9013.c
> index 6a5b40c..fbf6bca 100644
> --- a/drivers/media/dvb/frontends/af9013.c
> +++ b/drivers/media/dvb/frontends/af9013.c
> @@ -1094,7 +1094,10 @@ static int af9013_read_status(struct dvb_frontend *fe, fe_status_t *status)
>   	}
>
>   	ret = af9013_update_statistics(fe);
> -
> +	if (ret)
> +		goto error;
> +	/* Force empty stream buffer if overflow */
> +	ret = af9013_write_reg_bits(state, 0xd500, 7, 1, 0);
>   error:
>   	return ret;
>   }


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