i2c: xlp9xx: Make sure the transfer size is not more than I2C_SMBUS_BLOCK_SIZE

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For SMBus transactions the max permissible transfer size is
I2C_SMBUS_BLOCK_SIZE. It is possible that some clients might
not follow it strictly occasionally.
This would lead to stack corruption if the driver copies more than
I2C_SMBUS_BLOCK_SIZE bytes. Add a check to avoid such conditions.

Signed-off-by: Jayachandran C <jnair@caviumnetworks.com>
Signed-off-by: George Cherian <george.cherian@cavium.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

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George Cherian 2018-05-16 00:00:18 -07:00 • committed by Wolfram Sang

parent 8d504d804a

commit 88b4116e7e

1 changed files with 24 additions and 13 deletions

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37

drivers/i2c/busses/i2c-xlp9xx.c

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