* Russell King <rmk+lkml@arm.linux.org.uk> [041102 15:27]:
> 
> Ok, I'll send a pull request imminently.  For those who don't want to
> wait, latest patch against Linus' tree is at:
> 
>   http://www.arm.linux.org.uk/~rmk/misc/linus-serial.diff

I tried the current BK tree on omap, and the serial ports work with
the following patch.

However, on omap 1510, the change of interrupt return value in
serial8250_interrupt from IRQ_HANDLED to IRQ_RETVAL(handled) causes
a problem on the first RX interrupt. It looks like the IIR register is
not ready for reading right away, and at first shows that no interrupt
happened (UART_IIR_NO_INT stays high).

This is probably a hardware issue, but might trigger something
similar on other hardware as well.

Regards,

Tony