From 09f617219fe9ccd8d7b65dc3e879b5889f663b5a Mon Sep 17 00:00:00 2001 From: "Lin.Cao" Date: Wed, 25 Oct 2023 11:32:41 +0800 Subject: [PATCH] drm/amd: check num of link levels when update pcie param [ Upstream commit 406e8845356d18bdf3d3a23b347faf67706472ec ] In SR-IOV environment, the value of pcie_table->num_of_link_levels will be 0, and num_of_levels - 1 will cause array index out of bounds Signed-off-by: Lin.Cao Acked-by: Jingwen Chen Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c index 4aeb84572e5b..5355f621388b 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c @@ -2430,6 +2430,9 @@ int smu_v13_0_update_pcie_parameters(struct smu_context *smu, uint32_t smu_pcie_arg; int ret, i; + if (!num_of_levels) + return 0; + if (!(smu->adev->pm.pp_feature & PP_PCIE_DPM_MASK)) { if (pcie_table->pcie_gen[num_of_levels - 1] < pcie_gen_cap) pcie_gen_cap = pcie_table->pcie_gen[num_of_levels - 1];