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| author |   Wolfram Sang <wsa+renesas@sang-engineering.com> | 2020-06-28 13:52:44 +0200 |
|---|---|---|
| committer |   Wolfram Sang <wsa@kernel.org> | 2020-07-04 08:20:38 +0200 |
| commit | 597911287fcd13c3a4b4aa3e0a52b33d431e0a8e (patch) | |
| tree | 70f04b578a42b89d8b860169cec92c804a13f30c | |
| parent | i2c: add Kconfig help text for slave mode (diff) | |
| download | linux-dev-597911287fcd13c3a4b4aa3e0a52b33d431e0a8e.tar.xz linux-dev-597911287fcd13c3a4b4aa3e0a52b33d431e0a8e.zip | |
i2c: mlxcpld: check correct size of maximum RECV_LEN packet
I2C_SMBUS_BLOCK_MAX defines already the maximum number as defined in the
SMBus 2.0 specs. I don't see a reason to add 1 here. Also, fix the errno
to what is suggested for this error.
Fixes: c9bfdc7c16cb ("i2c: mlxcpld: Add support for smbus block read transaction")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Michael Shych <michaelsh@mellanox.com>
Tested-by: Michael Shych <michaelsh@mellanox.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
| -rw-r--r-- | drivers/i2c/busses/i2c-mlxcpld.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-mlxcpld.c b/drivers/i2c/busses/i2c-mlxcpld.c index 2fd717d8dd30..71d7bae2cbca 100644 --- a/drivers/i2c/busses/i2c-mlxcpld.c +++ b/drivers/i2c/busses/i2c-mlxcpld.c @@ -337,9 +337,9 @@ static int mlxcpld_i2c_wait_for_tc(struct mlxcpld_i2c_priv *priv) if (priv->smbus_block && (val & MLXCPLD_I2C_SMBUS_BLK_BIT)) { mlxcpld_i2c_read_comm(priv, MLXCPLD_LPCI2C_NUM_DAT_REG, &datalen, 1); - if (unlikely(datalen > (I2C_SMBUS_BLOCK_MAX + 1))) { + if (unlikely(datalen > I2C_SMBUS_BLOCK_MAX)) { dev_err(priv->dev, "Incorrect smbus block read message len\n"); - return -E2BIG; + return -EPROTO; } } else { datalen = priv->xfer.data_len; |