On Fri, Sep 29, 2023 at 10:53:56AM +0700, Tam Nguyen wrote: > During SMBus block data read process, we have seen high interrupt rate > because of TX_EMPTY irq status while waiting for block length byte (the > first data byte after the address phase). The interrupt handler does not > do anything because the internal state is kept as STATUS_WRITE_IN_PROGRESS. > Hence, we should disable TX_EMPTY irq until I2C DW receives first data IRQ DesignWare > byte from I2C device, then re-enable it. > > It takes 0.789 ms for host to receive data length from slave. > Without the patch, i2c_dw_isr is called 99 times by TX_EMPTY interrupt. i2c_dw_isr() > And it is none after applying the patch. > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Chuong Tran <chuong@xxxxxxxxxxxxxxxxxxxxxx> Who is this guy? Do you need Co-developed-by tag? > Signed-off-by: Tam Nguyen <tamnguyenchi@xxxxxxxxxxxxxxxxxxxxxx> Other than that, agree with Serge's points. -- With Best Regards, Andy Shevchenko
