drv: mask in PAGE_SIZE offsets

The function to allocate the sg table wants to cleanly map transfer by PAGE_SIZE: make it happy Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

drv: mask in PAGE_SIZE offsets
The function to allocate the sg table wants to cleanly map transfer by PAGE_SIZE: make it happy Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
afadd4cb · Federico Vaga · 46f2dc86 · afadd4cb
Commit afadd4cb authored Aug 14, 2019 by Federico Vaga
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fa-dma.c kernel/fa-dma.c +1 -0

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--- a/kernel/fa-dma.c
+++ b/kernel/fa-dma.c
@@ -324,6 +324,7 @@ static int zfad_dma_prep_slave_sg(struct dma_chan *dchan,


 	max_segment_size = dma_get_max_seg_size(dchan->device->dev);
+	max_segment_size &= PAGE_MASK; /* to make alloc_table happy */
 	/* With some version we cannot use the version from the Linux kernel */
 	fa->sg_alloc_table_from_pages(&zfad_block->sgt, pages, nr_pages,
 				      offset_in_page(zfad_block->block->data),