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Laurent Pinchart
63348705060
Laurent Pinchart committed dca75fbfb71
drm: omapdrm: Use a spinlock to protect the CRTC pending flag

commit d173d3dc5e41af969c1b230a3a6357e51b9baaeb upstream.

The CRTC pending flag will need to be accessed atomically in the vblank
interrupt handler, memory barriers won't be enough to protect it. Use a
spinlock instead.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>