[Intel-gfx] [PATCH] drm/i915: disable pci resize on 32-bit machine

[Matthew Auld]

On 26/07/2022 09:32, Nirmoy Das wrote:
> PCI bar resize only works with 64 bit BAR so disable
> this on 32-bit machine.

Maybe also mention somewhere that this is just to fix a compiler warning 
with the 0x100000000ull being out-of-range with resource_size_t on 32bit?

Acked-by: Matthew Auld <matthew.auld at intel.com>

> 
> Fixes: a91d1a17cd341 ("drm/i915: Add support for LMEM PCIe resizable bar")
> Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>
> ---
>   drivers/gpu/drm/i915/gt/intel_region_lmem.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c
> index 6e90032e12e9..aa6aed837194 100644
> --- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c
> +++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c
> @@ -15,6 +15,7 @@
>   #include "gt/intel_gt_mcr.h"
>   #include "gt/intel_gt_regs.h"
>   
> +#ifdef CONFIG_64BIT
>   static void _release_bars(struct pci_dev *pdev)
>   {
>   	int resno;
> @@ -111,6 +112,9 @@ static void i915_resize_lmem_bar(struct drm_i915_private *i915, resource_size_t
>   	pci_assign_unassigned_bus_resources(pdev->bus);
>   	pci_write_config_dword(pdev, PCI_COMMAND, pci_cmd);
>   }
> +#else
> +static void i915_resize_lmem_bar(struct drm_i915_private *i915, resource_size_t lmem_size) {}
> +#endif
>   
>   static int
>   region_lmem_release(struct intel_memory_region *mem)