diff options
| author | Johannes Stezenbach <js@linuxtv.org> | 2005-11-08 21:35:25 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-09 07:56:03 -0800 |
| commit | b90ed914e513a6ad6184f7a46a0df0888dcfc177 (patch) | |
| tree | 31c9b27b6140499dc930e47f6dd1d7cbe0893584 /drivers/media/dvb/frontends/or51211.c | |
| parent | 5c15c0b4fa850543b8ccfcf93686d24456cc384d (diff) | |
[PATCH] dvb: Fix integer overflow bug
Fix integer overflow bug in read_signal_strength() reported by Anthony
Leclerc.
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/media/dvb/frontends/or51211.c')
| -rw-r--r-- | drivers/media/dvb/frontends/or51211.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/media/dvb/frontends/or51211.c b/drivers/media/dvb/frontends/or51211.c index 8a9db23dd1b..531f76246e5 100644 --- a/drivers/media/dvb/frontends/or51211.c +++ b/drivers/media/dvb/frontends/or51211.c @@ -339,6 +339,7 @@ static int or51211_read_signal_strength(struct dvb_frontend* fe, u16* strength) u8 rec_buf[2]; u8 snd_buf[4]; u8 snr_equ; + u32 signal_strength; /* SNR after Equalizer */ snd_buf[0] = 0x04; @@ -358,8 +359,11 @@ static int or51211_read_signal_strength(struct dvb_frontend* fe, u16* strength) snr_equ = rec_buf[0] & 0xff; /* The value reported back from the frontend will be FFFF=100% 0000=0% */ - *strength = (((5334 - i20Log10(snr_equ))/3+5)*65535)/1000; - + signal_strength = (((5334 - i20Log10(snr_equ))/3+5)*65535)/1000; + if (signal_strength > 0xffff) + *strength = 0xffff; + else + *strength = signal_strength; dprintk("read_signal_strength %i\n",*strength); return 0; |