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

[Das, Nirmoy]

On 7/27/2022 6:58 PM, Matthew Auld wrote:
> 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?


Yes, sounds good. I will resend with a comment.


Nirmoy

>
> 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)