On Thu, Aug 01, 2024 at 11:25:07AM +0300, Baruch Siach wrote: > diff --git a/kernel/dma/pool.c b/kernel/dma/pool.c > index d10613eb0f63..a6e15db9d1e7 100644 > --- a/kernel/dma/pool.c > +++ b/kernel/dma/pool.c > @@ -70,9 +70,10 @@ static bool cma_in_zone(gfp_t gfp) > /* CMA can't cross zone boundaries, see cma_activate_area() */ > end = cma_get_base(cma) + size - 1; > if (IS_ENABLED(CONFIG_ZONE_DMA) && (gfp & GFP_DMA)) > - return end <= DMA_BIT_MASK(zone_dma_bits); > + return end <= zone_dma_limit; > + /* Account for possible zone_dma_limit > DMA_BIT_MASK(32) */ > if (IS_ENABLED(CONFIG_ZONE_DMA32) && (gfp & GFP_DMA32)) > - return end <= DMA_BIT_MASK(32); > + return end <= DMA_BIT_MASK(32) || end <= zone_dma_limit; > return true; > } > > diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c > index 043b0ecd3e8d..53595eb41922 100644 > --- a/kernel/dma/swiotlb.c > +++ b/kernel/dma/swiotlb.c > @@ -450,7 +450,7 @@ int swiotlb_init_late(size_t size, gfp_t gfp_mask, > if (!remap) > io_tlb_default_mem.can_grow = true; > if (IS_ENABLED(CONFIG_ZONE_DMA) && (gfp_mask & __GFP_DMA)) > - io_tlb_default_mem.phys_limit = DMA_BIT_MASK(zone_dma_bits); > + io_tlb_default_mem.phys_limit = zone_dma_limit; > else if (IS_ENABLED(CONFIG_ZONE_DMA32) && (gfp_mask & __GFP_DMA32)) > io_tlb_default_mem.phys_limit = DMA_BIT_MASK(32); I think this needs some adjustment as the cma_in_zone() case. Maybe just use max(DMA_BIT_MASK(32), zone_dma_limit) in both cases for consistency. -- Catalin
