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[media] mxl111sf: disable snr / ber calculations for DVB-T

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Leaving this code enabled breaks the build on some architectures,
and we shouldn't have any floating point math in the kernel, anyway.

These macros need to be re-written, but it's harmless to simply
return zero for now.

Signed-off-by: Michael Krufky <mkrufky@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Michael Krufky 2011-10-20 15:42:34 +01:00 committed by Mauro Carvalho Chehab
parent 4f98480f32
commit 7e8d8f6df3
1 changed files with 10 additions and 0 deletions
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10
drivers/media/dvb/dvb-usb/mxl111sf-demod.c
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@ -370,10 +370,20 @@ static int mxl111sf_demod_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
return ret; return ret;
} }
#ifdef MXL111SF_DEMOD_ENABLE_CALCULATIONS
/* FIXME: leaving this enabled breaks the build on some architectures,
* and we shouldn't have any floating point math in the kernel, anyway.
*
* These macros need to be re-written, but it's harmless to simply
* return zero for now. */
#define CALCULATE_BER(avg_errors, count) \ #define CALCULATE_BER(avg_errors, count) \
((u32)(avg_errors * 4)/(count*64*188*8)) ((u32)(avg_errors * 4)/(count*64*188*8))
#define CALCULATE_SNR(data) \ #define CALCULATE_SNR(data) \
((u32)((10 * (u32)data / 64) - 2.5)) ((u32)((10 * (u32)data / 64) - 2.5))
#else
#define CALCULATE_BER(avg_errors, count) 0
#define CALCULATE_SNR(data) 0
#endif
static int mxl111sf_demod_read_ber(struct dvb_frontend *fe, u32 *ber) static int mxl111sf_demod_read_ber(struct dvb_frontend *fe, u32 *ber)
{ {