From: Felix Kuehling <Felix.Kuehling@amd.com>
Date: Tue, 1 May 2018 17:56:09 -0400
Subject: drm/amdkfd: Remove initialization of cp_hqd_ib_control on CIK
Git-commit: ccb76b149e1c849c0aee6b5043aed74d41064ad6
Patch-mainline: v4.20 or v4.20-rc7 (next release)
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

The initialization is not necessary. amd-kfd-staging and ROCm
releases have worked without it for two years.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c |    4 ----
 1 file changed, 4 deletions(-)

--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
@@ -79,10 +79,6 @@ static int init_mqd(struct mqd_manager *
 	m->cp_mqd_base_addr_lo        = lower_32_bits(addr);
 	m->cp_mqd_base_addr_hi        = upper_32_bits(addr);
 
-	m->cp_hqd_ib_control = DEFAULT_MIN_IB_AVAIL_SIZE | IB_ATC_EN;
-	/* Although WinKFD writes this, I suspect it should not be necessary */
-	m->cp_hqd_ib_control = IB_ATC_EN | DEFAULT_MIN_IB_AVAIL_SIZE;
-
 	m->cp_hqd_quantum = QUANTUM_EN | QUANTUM_SCALE_1MS |
 				QUANTUM_DURATION(10);