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drm/amdgpu: Use pci_rebar_get_max_size()

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Use pci_rebar_get_max_size() to simplify amdgpu_device_resize_fb_bar().

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patch.msgid.link/20251113180053.27944-11-ilpo.jarvinen@linux.intel.com
This commit is contained in:
Ilpo Järvinen
2025-11-13 20:00:52 +02:00
committed by Bjorn Helgaas
parent 46ba95bed9
commit c7df7059e3
1 changed files with 5 additions and 3 deletions
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8
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@@ -1673,9 +1673,9 @@ int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev)
int rbar_size = pci_rebar_bytes_to_size(adev->gmc.real_vram_size);
struct pci_bus *root;
struct resource *res;
int max_size, r;
unsigned int i;
u16 cmd;
int r;
if (!IS_ENABLED(CONFIG_PHYS_ADDR_T_64BIT))
return 0;
@@ -1721,8 +1721,10 @@ int amdgpu_device_resize_fb_bar(struct amdgpu_device *adev)
return 0;
/* Limit the BAR size to what is available */
rbar_size = min(fls(pci_rebar_get_possible_sizes(adev->pdev, 0)) - 1,
rbar_size);
max_size = pci_rebar_get_max_size(adev->pdev, 0);
if (max_size < 0)
return 0;
rbar_size = min(max_size, rbar_size);
/* Disable memory decoding while we change the BAR addresses and size */
pci_read_config_word(adev->pdev, PCI_COMMAND, &cmd);