diff options
| author |   Fan Du <fan.du@intel.com> | 2014-09-16 17:21:04 +0800 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2014-09-20 14:56:19 +0200 |
| commit | 979bbf7b7ae75cfc06e09d09eda38009a3bdc4a4 (patch) | |
| tree | 21a516ee7c162ac5d7b7718aec594a729e875087 /drivers/i2c | |
| parent | i2c: rcar: fix RCAR_IRQ_ACK_{RECV|SEND} (diff) | |
| download | linux-dev-979bbf7b7ae75cfc06e09d09eda38009a3bdc4a4.tar.xz linux-dev-979bbf7b7ae75cfc06e09d09eda38009a3bdc4a4.zip | |
i2c: ismt: use correct length when copy buffer
In block write mode, when encapsulating dma_buffer, first element is
'command', the rest is data buffer, so only copy actual data buffer
starting from block[1] with the size indicating by block[0].
Signed-off-by: Fan Du <fan.du@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-ismt.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-ismt.c b/drivers/i2c/busses/i2c-ismt.c index 984492553e95..d9ee43c80cde 100644 --- a/drivers/i2c/busses/i2c-ismt.c +++ b/drivers/i2c/busses/i2c-ismt.c @@ -497,7 +497,7 @@ static int ismt_access(struct i2c_adapter *adap, u16 addr, desc->wr_len_cmd = dma_size; desc->control |= ISMT_DESC_BLK; priv->dma_buffer[0] = command; - memcpy(&priv->dma_buffer[1], &data->block[1], dma_size); + memcpy(&priv->dma_buffer[1], &data->block[1], dma_size - 1); } else { /* Block Read */ dev_dbg(dev, "I2C_SMBUS_BLOCK_DATA: READ\n"); @@ -525,7 +525,7 @@ static int ismt_access(struct i2c_adapter *adap, u16 addr, desc->wr_len_cmd = dma_size; desc->control |= ISMT_DESC_I2C; priv->dma_buffer[0] = command; - memcpy(&priv->dma_buffer[1], &data->block[1], dma_size); + memcpy(&priv->dma_buffer[1], &data->block[1], dma_size - 1); } else { /* i2c Block Read */ dev_dbg(dev, "I2C_SMBUS_I2C_BLOCK_DATA: READ\n"); |