[PATCH 08/28] mISDN: Fix division by zero
Karsten Keil <[email protected]>
| Newsgroups | gmane.linux.network,gmane.linux.isdn.i4l.user |
|---|---|
| Message-ID | <[email protected]> |
If DTMF debug is set and tresh goes under 100, the printk will cause a division by zero. Signed-off-by: Karsten Keil <[email protected]> --- drivers/isdn/mISDN/dsp_dtmf.c | 19 ++++++++++++++----- 1 files changed, 14 insertions(+), 5 deletions(-) diff --git a/drivers/isdn/mISDN/dsp_dtmf.c b/drivers/isdn/mISDN/dsp_dtmf.c index 887860b..642f30b 100644 --- a/drivers/isdn/mISDN/dsp_dtmf.c +++ b/drivers/isdn/mISDN/dsp_dtmf.c @@ -222,16 +222,25 @@ coefficients: goto storedigit; } - if (dsp_debug & DEBUG_DSP_DTMFCOEFF) + if (dsp_debug & DEBUG_DSP_DTMFCOEFF) { + s32 tresh_100 = tresh/100; + + if (tresh_100 == 0) { + tresh_100 = 1; + printk(KERN_DEBUG + "tresh(%d) too small set tresh/100 to 1\n", + tresh); + } printk(KERN_DEBUG "a %3d %3d %3d %3d %3d %3d %3d %3d" " tr:%3d r %3d %3d %3d %3d %3d %3d %3d %3d\n", result[0] / 10000, result[1] / 10000, result[2] / 10000, result[3] / 10000, result[4] / 10000, result[5] / 10000, result[6] / 10000, result[7] / 10000, tresh / 10000, - result[0] / (tresh / 100), result[1] / (tresh / 100), - result[2] / (tresh / 100), result[3] / (tresh / 100), - result[4] / (tresh / 100), result[5] / (tresh / 100), - result[6] / (tresh / 100), result[7] / (tresh / 100)); + result[0] / (tresh_100), result[1] / (tresh_100), + result[2] / (tresh_100), result[3] / (tresh_100), + result[4] / (tresh_100), result[5] / (tresh_100), + result[6] / (tresh_100), result[7] / (tresh_100)); + } /* calc digit (lowgroup/highgroup) */ lowgroup = -1; -- 1.7.3.4