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Commita2bd970

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nvincent-vosslohwsakernel
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i2c: cpm: Fix i2c_ram structure
the i2c_ram structure is missing the sdmatmp field mentionned indatasheet for MPC8272 at paragraph 36.5. With this field missing, thehardware would write past the allocated memory done throughcpm_muram_alloc for the i2c_ram structure and land in memory allocatedfor the buffers descriptors corrupting the cbd_bufaddr field. Since thisfield is only set during setup(), the first i2c transaction would workand the following would send data read from an arbitrary memorylocation.Fixes:61045db ("i2c: Add support for I2C bus on Freescale CPM1/CPM2 controllers")Signed-off-by: Nicolas VINCENT <nicolas.vincent@vossloh.com>Acked-by: Jochen Friedrich <jochen@scram.de>Acked-by: Christophe Leroy <christophe.leroy@csgroup.eu>Signed-off-by: Wolfram Sang <wsa@kernel.org>
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‎drivers/i2c/busses/i2c-cpm.c‎

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@@ -65,6 +65,9 @@ struct i2c_ram {
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charres1[4];/* Reserved */
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ushortrpbase;/* Relocation pointer */
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charres2[2];/* Reserved */
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/* The following elements are only for CPM2 */
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charres3[4];/* Reserved */
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uintsdmatmp;/* Internal */
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};
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#defineI2COM_START0x80

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