Re: [PATCH 1/2]: serial8250: Use native_io_delay on the x86
From: H. Peter Anvin
Date: Wed Mar 17 2010 - 14:26:54 EST
On 03/17/2010 05:30 AM, Simon Kagstrom wrote:
#ifdef __i386__
- outb(0xff, 0x080);
+ native_io_delay();
#endif
There is something a lot more weird about this. First of all, it's
#ifdef'd out on all but __i386__ including x86-64; second, it looks like
this is specific to synchronizing to the IER.
I'm wondering if the right thing isn't to add a dummy write to the SCR
register (or similar.)
-hpa
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/