RE: [PATCH] mpx5200_uart: drop port lock across tty_flip_buffer() call
From: Thomas Gleixner <hidden>
Date: 2007-07-26 09:41:38
On Thu, 2007-07-26 at 09:25 +0000, Daniel Schnell wrote:
Thomas Gleixner wrote:quoted
On Wed, 2007-07-25 at 13:42 -0600, Grant Likely wrote:quoted
On 7/25/07, Thomas Gleixner [off-list ref] wrote:quoted
The port lock needs to be dropped across the tty_flip_buffer call, as it would lead to a deadlock with the spin_lock(&port->lock) in uart_start() Uncovered by lockdep / preempt-rt Signed-off-by: Thomas Gleixner <redacted>While you are at it 8°> ... the mpc5200-fec driver has serious problems with preempt-rt, similar to what the IBM emac had ....
Care to whip up a patch ? tglx