Re: [PATCH v2] i2c: xlp9xx: Fix case where SSIF read transaction completes early

[Wolfram Sang]

On Wed, Aug 08, 2018 at 11:36:48PM -0700, George Cherian wrote:
> During ipmi stress tests we see occasional failure of transactions
> at the boot time. This happens in the case of a I2C_M_RECV_LEN
> transactions, when the read transfer completes (with the initial
> read length of 34) before the driver gets a chance to handle interrupts.
> 
> The current driver code expects at least 2 interrupts for I2C_M_RECV_LEN
> transactions. The length is updated during the first interrupt, and  the
> buffer contents are only copied during subsequent interrupts. In case of
> just one interrupt, we will complete the transaction without copying
> out the bytes from RX fifo.
> 
> Update the code to drain the RX fifo after the length update,
> so that the transaction completes correctly in all cases.
> 
> Signed-off-by: George Cherian <george.cherian@xxxxxxxxxx>

Applied to for-current, thanks!

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