[PATCH 1/2] drm/vmwgfx: Drop preempt_disable() in vmw_fifo_ping_host()

[Thomas Hellstrom]

On Mon, 2020-02-24 at 15:07 +0100, Sebastian Andrzej Siewior wrote:
> vmw_fifo_ping_host() disables preemption around a test and a register
> write via vmw_write(). The write function acquires a spinlock_t typed
> lock which is not allowed in a preempt_disable()ed section on
> PREEMPT_RT. This has been reported in the bugzilla.
> 
> It has been explained by Thomas Hellstrom that this
> preempt_disable()ed
> section is not required for correctness.
> 
> Remove the preempt_disable() section.
> 

Hi, Sebastian,

I suppose there isn't something like a preempt_disable_unless_RT()
macro?

If not,
Reviewed-by: Thomas Hellstrom <thellstrom at vmware.com>

I'll include in the next vmwgfx-next pull request

Thanks,
Thomas