diff --git a/sys/arm/arm/busdma_machdep.c b/sys/arm/arm/busdma_machdep.c
--- a/sys/arm/arm/busdma_machdep.c
+++ b/sys/arm/arm/busdma_machdep.c
@@ -812,6 +812,7 @@
 	vm_offset_t vaddr;
 	vm_offset_t vendaddr;
 	bus_addr_t paddr;
+	bus_size_t sg_len;
 
 	if (map->pagesneeded == 0) {
 		CTR5(KTR_BUSDMA, "lowaddr= %d, boundary= %d, alignment= %d"
@@ -826,16 +827,16 @@
 		vendaddr = (vm_offset_t)buf + buflen;
 
 		while (vaddr < vendaddr) {
+			sg_len = MIN(vendaddr - vaddr,
+			    (PAGE_SIZE - ((vm_offset_t)vaddr & PAGE_MASK)));
+			sg_len = MIN(sg_len, dmat->maxsegsz);
 			if (__predict_true(pmap == kernel_pmap))
 				paddr = pmap_kextract(vaddr);
 			else
 				paddr = pmap_extract(pmap, vaddr);
-			if (must_bounce(dmat, map, paddr,
-			    min(vendaddr - vaddr, (PAGE_SIZE - ((vm_offset_t)vaddr &
-			    PAGE_MASK)))) != 0) {
+			if (must_bounce(dmat, map, paddr, sg_len) != 0)
 				map->pagesneeded++;
-			}
-			vaddr += (PAGE_SIZE - ((vm_offset_t)vaddr & PAGE_MASK));
+			vaddr += sg_len;
 		}
 		CTR1(KTR_BUSDMA, "pagesneeded= %d", map->pagesneeded);
 	}
diff --git a/sys/arm64/arm64/busdma_bounce.c b/sys/arm64/arm64/busdma_bounce.c
--- a/sys/arm64/arm64/busdma_bounce.c
+++ b/sys/arm64/arm64/busdma_bounce.c
@@ -693,6 +693,7 @@
 
 		while (vaddr < vendaddr) {
 			sg_len = PAGE_SIZE - ((vm_offset_t)vaddr & PAGE_MASK);
+			sg_len = MIN(sg_len, dmat->common.maxsegsz);
 			if (pmap == kernel_pmap)
 				paddr = pmap_kextract(vaddr);
 			else
diff --git a/sys/powerpc/powerpc/busdma_machdep.c b/sys/powerpc/powerpc/busdma_machdep.c
--- a/sys/powerpc/powerpc/busdma_machdep.c
+++ b/sys/powerpc/powerpc/busdma_machdep.c
@@ -520,6 +520,7 @@
 			bus_size_t sg_len;
 
 			sg_len = PAGE_SIZE - ((vm_offset_t)vaddr & PAGE_MASK);
+			sg_len = MIN(sg_len, dmat->maxsegsz);
 			if (pmap == kernel_pmap)
 				paddr = pmap_kextract(vaddr);
 			else
diff --git a/sys/riscv/riscv/busdma_bounce.c b/sys/riscv/riscv/busdma_bounce.c
--- a/sys/riscv/riscv/busdma_bounce.c
+++ b/sys/riscv/riscv/busdma_bounce.c
@@ -531,6 +531,7 @@
 
 		while (vaddr < vendaddr) {
 			sg_len = PAGE_SIZE - ((vm_offset_t)vaddr & PAGE_MASK);
+			sg_len = MIN(sg_len, dmat->common.maxsegsz);
 			if (pmap == kernel_pmap)
 				paddr = pmap_kextract(vaddr);
 			else
diff --git a/sys/x86/x86/busdma_bounce.c b/sys/x86/x86/busdma_bounce.c
--- a/sys/x86/x86/busdma_bounce.c
+++ b/sys/x86/x86/busdma_bounce.c
@@ -560,6 +560,7 @@
 
 		while (vaddr < vendaddr) {
 			sg_len = PAGE_SIZE - ((vm_offset_t)vaddr & PAGE_MASK);
+			sg_len = MIN(sg_len, dmat->common.maxsegsz);
 			if (pmap == kernel_pmap)
 				paddr = pmap_kextract(vaddr);
 			else