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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Xiaojie Yuan <xiaojie.yuan@amd.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.3 049/166] drm/amdgpu/sdma5: fix number of sdma5 trap irq types for navi1x
Date:   Sun,  6 Oct 2019 19:20:15 +0200
Message-Id: <20191006171217.160867940@linuxfoundation.org>
In-Reply-To: <20191006171212.850660298@linuxfoundation.org>
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From: Xiaojie Yuan <xiaojie.yuan@amd.com>

[ Upstream commit 9e48495017342c5d445b25eedd86d6fd884a6496 ]

v2: set num_types based on num_instances

navi1x has 2 sdma engines but commit
"e7b58d03b678 drm/amdgpu: reorganize sdma v4 code to support more instances"
changes the max number of sdma irq types (AMDGPU_SDMA_IRQ_LAST) from 2 to 8
which causes amdgpu_irq_gpu_reset_resume_helper() to recover irq of sdma
engines with following logic:

(enable irq for sdma0) * 1 time
(enable irq for sdma1) * 1 time
(disable irq for sdma1) * 6 times

as a result, after gpu reset, interrupt for sdma1 is lost.

Signed-off-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
index 3747c3f1f0cc8..15c371fac469e 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
@@ -1583,7 +1583,8 @@ static const struct amdgpu_irq_src_funcs sdma_v5_0_illegal_inst_irq_funcs = {
 
 static void sdma_v5_0_set_irq_funcs(struct amdgpu_device *adev)
 {
-	adev->sdma.trap_irq.num_types = AMDGPU_SDMA_IRQ_LAST;
+	adev->sdma.trap_irq.num_types = AMDGPU_SDMA_IRQ_INSTANCE0 +
+					adev->sdma.num_instances;
 	adev->sdma.trap_irq.funcs = &sdma_v5_0_trap_irq_funcs;
 	adev->sdma.illegal_inst_irq.funcs = &sdma_v5_0_illegal_inst_irq_funcs;
 }
-- 
2.20.1