tree 008ac36df12bcc75c1498796300cdef78860f55c
parent c23e7548ee317c043660f9b992388257e99f1776
author Laurent Pinchart <laurent.pinchart@ideasonboard.com> 1699990236 +0200
committer Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> 1700031177 +0200

testpat: Fix memory mapping in threaded drawing

The IFramebuffer::map() function is not thread-safe, which is why the
threaded implementation of draw_test_pattern_impl() maps all planes
before starting to draw. A typo slipped in the code, resulting in only
plane 0 being mapped. This didn't result in an immediate segfault, as
drawing operations in the worker threads map the remaining planes.
However, due to the implementation of DumbFramebuffer::map(), this can
result in the same plane being mapped multiple times, with only one of
the mapping recorded in the mapping cache. The other mappings are then
leaked, leading not only to extra memory consumption, but also to the
DRM device never being released even after the destruction of the Card
object.

Fix this.

Fixes: 40d96062a37c ("Revert "testpat: remove threaded drawing"")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>