<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - gbm_bo_map fails on i915 when *map_data is not NULL before call" href="https://bugs.freedesktop.org/show_bug.cgi?id=110855#c1">Comment # 1</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - gbm_bo_map fails on i915 when *map_data is not NULL before call" href="https://bugs.freedesktop.org/show_bug.cgi?id=110855">bug 110855</a> from <a class="email" href="mailto:lemody@gmail.com" title="Tapani Pälli <lemody@gmail.com>"> Tapani Pälli</a> <pre>(In reply to M Stoeckl from <a href="show_bug.cgi?id=110855#c0">comment #0</a>) > Created <a href="attachment.cgi?id=144477" name="attach_144477" title="Test case, compile with gcc -lgbm">attachment 144477</a> <a href="attachment.cgi?id=144477&action=edit" title="Test case, compile with gcc -lgbm">[details]</a> > Test case, compile with gcc -lgbm > > The documentation for the function gbm_bo_map in src/gbm/main/gbm.c states > that the argument void** map_data is a "Returned opaque ptr for the mapped > region". Contrary to convention for a return value, if *map_data is not > NULL, and the DRI i965 driver is used, then gbm_bo_map fails. > > The value of *map_data is checked by intel_map_image in > src/mesa/drivers/dri/i965/intel_screen.c (line 823 in today's git master). Notably this happens with gallium drivers as well as the same check is done in dri2_map_image (src/gallium/state_trackers/dri/dri2.c) so the bug is against all drivers. I'm not sure why the check is there, AFAICT dri interface does not document anything special on such case.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>