4.17-stable review patch. If anyone has any objections, please let me know.
------------------ From: Wolfram Sang <[email protected]> commit 2a2c8ee2d72c4f1ba0f7fbb02dc74f971df0f934 upstream. This reverts commit 3e5f06bed72fe72166a6778f630241a893f67799. As per bugzilla #200045, this caused a regression. I don't really see a way to fix it without having the hardware. So, revert the patch and I will fix the issue I was seeing originally in the i2c-gpio driver itself. I couldn't find new users of this algorithm since, so there should be no one depending on the new behaviour. Reported-by: Sergey Larin <[email protected]> Fixes: 3e5f06bed72f ("i2c: algo-bit: init the bus to a known state") Signed-off-by: Wolfram Sang <[email protected]> Acked-by: Alex Deucher <[email protected]> Tested-by: Sergey Larin <[email protected]> Signed-off-by: Wolfram Sang <[email protected]> Cc: [email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/i2c/algos/i2c-algo-bit.c | 5 ----- 1 file changed, 5 deletions(-) --- a/drivers/i2c/algos/i2c-algo-bit.c +++ b/drivers/i2c/algos/i2c-algo-bit.c @@ -649,11 +649,6 @@ static int __i2c_bit_add_bus(struct i2c_ if (bit_adap->getscl == NULL) adap->quirks = &i2c_bit_quirk_no_clk_stretch; - /* Bring bus to a known state. Looks like STOP if bus is not free yet */ - setscl(bit_adap, 1); - udelay(bit_adap->udelay); - setsda(bit_adap, 1); - ret = add_adapter(adap); if (ret < 0) return ret;
