Hi Paul,

On Wed, Jan 25, 2012 at 9:00 PM, Paul Walmsley [off-list ref] wrote:
...

quoted

quoted

Ensure CONFIG_OMAP_PRM is set while testing irq_chaining with uart.
And for pm_qos usage ensure CONFIG_CPU_IDLE is selected other wise
console might be sluggish.

There is console lag for omap2plus_defconfig given that
CONFIG_CPU_IDLE is not enabled. Is the intention to force CPU_IDLE
into the defconfig or find an alternative for the new pm_qos when cpu
idle is disabled.

Seen on beagle-xm and 3.3-rc1.

Try this

http://marc.info/?l=linux-arm-kernel&m=132754676814391&w=2

I tried the series and the console returned to normal, I can confirm
that the following patch helps:

tty: serial: OMAP: use a 1-byte RX FIFO threshold in PIO mode

Thanks,

Omar