[RFC PATCH 108/162] drm/i915: Fix object page offset within a region

[Matthew Auld]

From: CQ Tang <cq.tang at intel.com>

Adjust the page offset with region start dma address.

Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Matthew Auld <matthew.auld at intel.com>
Cc: Abdiel Janulgue <abdiel.janulgue at linux.intel.com>
Cc: Niranjana Vishwanathapura <niranjana.vishwanathapura at intel.com>
Cc: Sudeep Dutt <sudeep.dutt at intel.com>
Signed-off-by: CQ Tang <cq.tang at intel.com>
---
 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 d8cac4c5881f..16424755e89c 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1051,7 +1051,9 @@ 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