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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [amdgpu SI] "drm/amd/amdgpu: Add GRBM lock to various SI functions" breaks amdgpu support for SI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97594#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [amdgpu SI] "drm/amd/amdgpu: Add GRBM lock to various SI functions" breaks amdgpu support for SI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97594">bug 97594</a>
from <span class="vcard"><a class="email" href="mailto:tom.stdenis@amd.com" title="Tom St Denis <tom.stdenis@amd.com>"> <span class="fn">Tom St Denis</span></a>
</span></b>
<pre>The problem is a double lock. The grbm_idx_mutex lock is taken in
gfx_v6_0_get_cu_info() which then calls gfx_v6_0_get_cu_active_bitmap() which
also takes the lock.
The fix is to remove the lock and the select from the parent function. I'll
attach a patch momentarily.</pre>
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