[RFC 48/60] drm/i915: Fix object page offset within a region

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From: CQ Tang <cq.tang@xxxxxxxxx>

Adjust the page offset with region start dma address.

Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Matthew Auld <matthew.auld@xxxxxxxxx>
Cc: Abdiel Janulgue <abdiel.janulgue@xxxxxxxxxxxxxxx>
Cc: Niranjana Vishwanathapura <niranjana.vishwanathapura@xxxxxxxxx>
Cc: Sudeep Dutt <sudeep.dutt@xxxxxxxxx>
Signed-off-by: CQ Tang <cq.tang@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_gpu_error.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 678ddec3237f..07d53c4e1a2c 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1033,7 +1033,9 @@ i915_vma_coredump_create(const struct intel_gt *gt,
 		for_each_sgt_daddr(dma, iter, vma->pages) {
 			void __iomem *s;
 
-			s = io_mapping_map_wc(&mem->iomap, dma, PAGE_SIZE);
+			s = io_mapping_map_wc(&mem->iomap,
+					      dma - mem->region.start,
+					      PAGE_SIZE);
 			ret = compress_page(compress,
 					    (void __force *)s, dst,
 					    true);
-- 
2.26.2

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