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authorHideki Iwamoto <h-iwamoto@kit.hi-ho.ne.jp>2005-09-25 17:01:11 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2005-10-28 14:02:07 -0700
commit5c50d1885981537ff3b8df6433951de6c9cb72cb (patch)
tree1440c92b1716fb27a93c96fc9494aa7980421d95 /drivers/i2c/i2c-core.c
parent0f69a612f950f7508e556bf1b09390087d112115 (diff)
[PATCH] i2c: Several PEC-related fixes in software SMBus emulation
Fix several errors in I2C SMBus emulation when PEC is used: * Weird logic error in SMBus Write Word transactions. * Wrong buffer size, affecting SMBus Block Write transactions. * Potential buffer overrun in SMBus Block Write transactions. From: Hideki Iwamoto <h-iwamoto@kit.hi-ho.ne.jp> Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> drivers/i2c/i2c-core.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
Diffstat (limited to 'drivers/i2c/i2c-core.c')
-rw-r--r--drivers/i2c/i2c-core.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index b55097d57b7a..9583a54ce16b 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -864,7 +864,7 @@ static int i2c_smbus_add_pec(u16 addr, u8 command, int size,
break;
case I2C_SMBUS_BYTE_DATA:
buf[2] = data->byte;
- data->word = buf[2] ||
+ data->word = buf[2] |
(i2c_smbus_pec(3, buf, NULL) << 8);
size = I2C_SMBUS_WORD_DATA;
break;
@@ -1033,8 +1033,8 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter * adapter, u16 addr,
need to use only one message; when reading, we need two. We initialize
most things with sane defaults, to keep the code below somewhat
simpler. */
- unsigned char msgbuf0[34];
- unsigned char msgbuf1[34];
+ unsigned char msgbuf0[I2C_SMBUS_BLOCK_MAX+3];
+ unsigned char msgbuf1[I2C_SMBUS_BLOCK_MAX+2];
int num = read_write == I2C_SMBUS_READ?2:1;
struct i2c_msg msg[2] = { { addr, flags, 1, msgbuf0 },
{ addr, flags | I2C_M_RD, 0, msgbuf1 }
@@ -1097,7 +1097,7 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter * adapter, u16 addr,
}
if(size == I2C_SMBUS_BLOCK_DATA_PEC)
(msg[0].len)++;
- for (i = 1; i <= msg[0].len; i++)
+ for (i = 1; i < msg[0].len; i++)
msgbuf0[i] = data->block[i-1];
}
break;