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[ALSA] snd-ak4114: Fix two array overflows

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Fix the handling of the TXCSB registers cache. There was one array
overflow in reg_write() and one in snd_ak4114_reg_write(). Thanks
to David Binderman for reporting the latter.
The second overflow probably doesn't matter much, given that the
function snd_ak4114_reg_write() appears to be never called. I wonder
why it exists and why it is exported.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Jean Delvare 2007-02-05 13:07:04 +01:00 committed by Jaroslav Kysela
parent 66e27788a3
commit 1ab774e049
1 changed files with 4 additions and 3 deletions
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7
sound/i2c/other/ak4114.c
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@ -42,8 +42,8 @@ static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char va
ak4114->write(ak4114->private_data, reg, val);
if (reg <= AK4114_REG_INT1_MASK)
ak4114->regmap[reg] = val;
else if (reg >= AK4114_REG_RXCSB0 && reg <= AK4114_REG_TXCSB4)
ak4114->txcsb[reg-AK4114_REG_RXCSB0] = val;
else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
ak4114->txcsb[reg-AK4114_REG_TXCSB0] = val;
}
static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg)
@ -127,7 +127,8 @@ void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char
if (reg <= AK4114_REG_INT1_MASK)
reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
reg_write(chip, reg, (chip->txcsb[reg] & ~mask) | val);
reg_write(chip, reg,
(chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
}
void snd_ak4114_reinit(struct ak4114 *chip)