[PATCH 2/2] i2c: qup: Fixed the DMA segments length
From: Wolfram Sang <hidden>
Date: 2016-07-15 06:38:20
Also in:
linux-arm-msm, linux-i2c, lkml
From: Wolfram Sang <hidden>
Date: 2016-07-15 06:38:20
Also in:
linux-arm-msm, linux-i2c, lkml
On Mon, May 09, 2016 at 06:14:31PM +0530, Abhishek Sahu wrote:
1. The current QCOM I2C driver code is failing for transfer length greater than 255. This is happening due to improper segments length as the I2C DMA segments can be maximum of 256 bytes. 2. The transfer length tlen was being initialized with 0 for 256 bytes, which is being passed for DMA mappings resulting in improper DMA mapping length. This patch fixes the above said problems by initializing the block count with the values calculated in qup_i2c_set_blk_data and calculating the remaining length for last DMA segment. Also, the block data length need to be decremented after each transfer. Additionally, this patch corrects the tlen assignment for DMA mapping. Signed-off-by: Abhishek Sahu <redacted>
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