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drm/amd/amdgpu: Ensure isp_kernel_buffer_alloc() creates a new BO

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When the BO pointer provided to amdgpu_bo_create_kernel() points to
non-NULL, amdgpu_bo_create_kernel() takes it as a hint to pin that address
rather than allocate a new BO.

This functionality is never desired for allocating ISP buffers. A new BO
should always be created when isp_kernel_buffer_alloc() is called, per the
description for isp_kernel_buffer_alloc().

Ensure this by zeroing *bo right before the amdgpu_bo_create_kernel() call.

Fixes: 55d42f6169 ("drm/amd/amdgpu: Add helper functions for isp buffers")
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Pratap Nirujogi <pratap.nirujogi@amd.com>
Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 73c8c29baa)
This commit is contained in:
Sultan Alsawaf 2025-11-07 13:07:13 -05:00 committed by Alex Deucher
parent 33c9957091
commit 7132f7e025
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_isp.c
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@ -280,6 +280,8 @@ int isp_kernel_buffer_alloc(struct device *dev, u64 size,
if (ret)
return ret;
/* Ensure *bo is NULL so a new BO will be created */
*bo = NULL;
ret = amdgpu_bo_create_kernel(adev,
size,
ISP_MC_ADDR_ALIGN,