<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [IVB SNA] sna_dri2_reuse_buffer:370 assertion 'kgem_bo_flink(&to_sna_from_drawable(draw)->kgem, get_private(buffer)->bo) == buffer->name' failed" href="https://bugs.freedesktop.org/show_bug.cgi?id=89903#c9">Comment # 9</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [IVB SNA] sna_dri2_reuse_buffer:370 assertion 'kgem_bo_flink(&to_sna_from_drawable(draw)->kgem, get_private(buffer)->bo) == buffer->name' failed" href="https://bugs.freedesktop.org/show_bug.cgi?id=89903">bug 89903</a> from <a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> Chris Wilson</a> <pre>I couldn't spot any obvious reason for a stale pointer (all the unrefs cleared the pointer). So I had to look for subtle reasons like being interrupted by a signal at just the wrong moment: commit be0fc3ce20fda064d68f38e24717552222d1fd74 Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> Date: Sun Apr 5 15:46:27 2015 +0100 sna: Block signals while releasing cursor under modeset Otherwise we may process a SIGIO moving the cursor away from the CRTC causing us to remove the cursor and then process a stale pointer inside the modeset after the signal is complete. Reported-by: Chris Bainbrigde <<a href="mailto:chris.bainbridge@gmail.com">chris.bainbridge@gmail.com</a>> References: <a class="bz_bug_link bz_status_NEW " title="NEW - [IVB SNA] sna_dri2_reuse_buffer:370 assertion 'kgem_bo_flink(&to_sna_from_drawable(draw)->kgem, get_private(buffer)->bo) == buffer->name' failed" href="show_bug.cgi?id=89903">https://bugs.freedesktop.org/show_bug.cgi?id=89903</a> Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>></pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>