qcacmn: IPA WAR for WB2SW release ring
WAR for IPA_OFFLOAD case. In IPA_OFFLOAD case, host provides buffers in
the WBM2SW release ring designated for IPA for TX. So this ring is used
to release TX completions into, by WBM, and also by IPA to pick up
buffers from, for TX.
In some cases, its observed that when WBM tries to release a buffer
into this ring, however the ring is full. This causes back pressure,
resulting in a FW crash.
By leaving some entries with no buffers attached, WBM will be able to
write to the ring, and from dumps we can figure out the buffer which is
causing this issue.
Change-Id: Ia0450d36dec643f2631fea13cb0b8facba7425b8
CRs-Fixed: 2535170
1 file changed