[SRU] [R] [PATCH 07/13] drm/amdgpu: use DISCOVERY_TMR_SIZE in ACPI TMR fallback

[Yo-Jung Leo Lin (AMD)]

From: "Jesse.Zhang" <Jesse.Zhang at amd.com>

BugLink: https://bugs.launchpad.net/bugs/2158690

amdgpu_acpi_get_tmr_info() returns the full TMR region size, not the IP
discovery table size. Using tmr_size as discovery.size can lead to oversized
allocations and probe failure.

In the ACPI fallback path, keep discovery.size as DISCOVERY_TMR_SIZE and only
use ACPI data for offset calculation.

Fixes: 01bdc7e219c4 ("drm/amdgpu: New interface to get IP discovery binary v3")
Reviewed-by: Lijo Lazar <lijo.lazar at amd.com>
Suggested-by: Lijo Lazar <lijo.lazar at amd.com>
Signed-off-by: Jesse Zhang <jesse.zhang at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
(cherry picked from commit 5c82adf957dcb187add5ee3209439c67b63df538)
Signed-off-by: Yo-Jung Leo Lin (AMD) <Leo.Lin at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
index bad572aad5fa..fd47ad79d38b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
@@ -321,7 +321,7 @@ static int amdgpu_discovery_get_tmr_info(struct amdgpu_device *adev,
 			ret = amdgpu_acpi_get_tmr_info(adev, &tmr_offset, &tmr_size);
 			if (ret)
 				return ret;
-			adev->discovery.size = (u32)tmr_size;
+			adev->discovery.size = DISCOVERY_TMR_SIZE;
 			adev->discovery.offset = tmr_offset + tmr_size - DISCOVERY_TMR_OFFSET;
 		}
 	}
-- 
2.43.0