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i2c: xgene: Avoid dma_buffer overrun

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SMBus block command uses the first byte of buffer for the data length.
The dma_buffer should be increased by 1 to avoid the overrun issue.

Reported-by: Phil Endecott <phil_gjouf_endecott@chezphil.org>
Signed-off-by: Hoan Tran <hotran@apm.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
This commit is contained in:
Hoan Tran 2016-10-10 10:13:10 -07:00 committed by Wolfram Sang
parent 60a951af8e
commit 603616017c
1 changed files with 1 additions and 1 deletions
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drivers/i2c/busses/i2c-xgene-slimpro.c
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@ -105,7 +105,7 @@ struct slimpro_i2c_dev {
struct mbox_chan *mbox_chan;
struct mbox_client mbox_client;
struct completion rd_complete;
u8 dma_buffer[I2C_SMBUS_BLOCK_MAX];
u8 dma_buffer[I2C_SMBUS_BLOCK_MAX + 1]; /* dma_buffer[0] is used for length */
u32 *resp_msg;
};