On Mon, 22 Oct 2012 10:23:07 -0400 Jun Chen <jun.d.chen@xxxxxxxxx> wrote: > > This patch make use of mod_timer instead of add_timer in the mrdy_assert function. > Because the srdy interrupter can go high when we are running function mrdy_assert and mrdy_assert > can be called by multi-entry. In our medfield platform, spi stress test can encounter this > error logs triggered by the BUG_ON of add_timer function.This patch had been tested on > our medfield platform. > > the scenario: > CPU0 CPU1 > mrdy_assert > set_bit(IFX_SPI_STATE_TIMER_PENDING) > ifx_spi_handle_srdy > ... > clear_bit(IFX_SPI_STATE_TIMER_PENDING) > ... > mrdy_assert > set_bit(IFX_SPI_STATE_TIMER_PENDING) > ... > add_timer > ... > add_timer > > cc:liu chuansheng <chuansheng.liu@xxxxxxxxx> > cc:Bi Chao <chao.bi@xxxxxxxxx> > Signed-off-by: Chen Jun <jun.d.chen@xxxxxxxxx> Acked-by: Alan Cox <alan@xxxxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
