diff --git a/block/bio.c b/block/bio.c
index a6fb6a0b42955..d1d8610badc7f 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -784,6 +784,8 @@ static inline bool page_is_mergeable(const struct bio_vec *bv,
 		return false;
 	if (xen_domain() && !xen_biovec_phys_mergeable(bv, page))
 		return false;
+	if (!zone_device_pages_are_mergeable(bv->bv_page, page))
+		return false;
 
 	*same_page = ((vec_end_addr & PAGE_MASK) == page_addr);
 	if (*same_page)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 6afdc09d0712a..585c67ff73e7e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1136,6 +1136,24 @@ static inline bool is_zone_device_page(const struct page *page)
 {
 	return page_zonenum(page) == ZONE_DEVICE;
 }
+
+/*
+ * Consecutive zone device pages should not be merged into the same sgl
+ * or bvec segment with other types of pages or if they belong to different
+ * pgmaps. Otherwise getting the pgmap of a given segment is not possible
+ * without scanning the entire segment. This helper returns true either if
+ * both pages are not zone device pages or both pages are zone device pages
+ * with the same pgmap.
+ */
+static inline bool zone_device_pages_are_mergeable(const struct page *a,
+						   const struct page *b)
+{
+	if (is_zone_device_page(a) != is_zone_device_page(b))
+		return false;
+	if (!is_zone_device_page(a))
+		return true;
+	return a->pgmap == b->pgmap;
+}
 extern void memmap_init_zone_device(struct zone *, unsigned long,
 				    unsigned long, struct dev_pagemap *);
 #else
@@ -1143,6 +1161,11 @@ static inline bool is_zone_device_page(const struct page *page)
 {
 	return false;
 }
+static inline bool zone_device_pages_are_mergable(const struct page *a,
+						  const struct page *b)
+{
+	return true;
+}
 #endif
 
 static inline bool is_zone_movable_page(const struct page *page)