drm/msm/vma: Avoid lock in VM_BIND fence signaling path

drm/msm/vma: Avoid lock in VM_BIND fence signaling path

Use msm_gem_unpin_active(), similar to what is used in the GEM_SUBMIT
path.  This avoids needing to hold the obj lock, and the end result is
the same.  (As with GEM_SUBMIT, we know the fence isn't signaled yet.)

Reported-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
Fixes: 2e6a8a1fe2b2 ("drm/msm: Add VM_BIND ioctl")
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/712230/
Message-ID: <20260316184442.673558-1-robin.clark@oss.qualcomm.com>