[PATCH] i2c: tegra: fix possible race condition after tx
swarren at nvidia.com
Thu Aug 11 16:54:25 EDT 2011
Doug Anderson wrote at Thursday, August 11, 2011 2:19 PM:
> In tegra_i2c_fill_tx_fifo, once we have finished pushing all the bytes
> to the I2C hardware controller, the interrupt might happen before we
> have updated i2c_dev->msg_buf_remaining at the end of the function.
> Then, in tegra_i2c_isr, we will call again tegra_i2c_fill_tx_fifo
> triggering weird behaviour. This has been shown to happen under real
> Signed-off-by: Doug Anderson <dianders at chromium.org>
Acked-by: Stephen Warren <swarren at nvidia.com>
It's worth pointing out that this patch supersedes a previous attempt to fix
the same problem, originally posted in https://lkml.org/lkml/2011/4/19/514,
if I'm understanding correctly.
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