On Fri, Aug 16, 2013 at 05:13:01PM +0530, Viresh Kumar wrote:
The -rt patch triggers a lockdep warning for serial drivers if tty_flip_buffer_push() is called with uart_port->lock locked. This never shows up on UP kernels.
What about SMP kernels? linux-next?
Release the port lock before calling tty_flip_buffer_push() and reacquire it after the call.
Similar stuff was already done for few other drivers in the past, like:
commit 2389b272168ceec056ca1d8a870a97fa9c26e11a Author: Thomas Gleixner tglx@linutronix.de Date: Tue May 29 21:53:50 2007 +0100
[ARM] 4417/1: Serial: Fix AMBA drivers lockingThis is neither tested nor compiled.
So I'm guessing you don't want it to be applied, if you can't take the time to at least test-build it, why should we?
{sigh}
I was working on Samsung's Arndale board and so was required to samsung serial driver. Then thought why not others :)
Rebased over: v3.11-rc5
Lots of tty and serial changes have happened since -rc5 in linux-next, can you please rebase, and test, these against that tree and resend them if they are still needed?
thanks,
greg k-h