Merge tag 'dma-mapping-5.10-2' of git://git.infradead.org/users/hch/dma-mapping

bb3540be · Linus Torvalds <[email protected]> · 2020-10-31 12:25:58 -07:00

Pull dma-mapping fix from Christoph Hellwig:
 "Fix an integer overflow on 32-bit platforms in the new DMA range code
  (Geert Uytterhoeven)"

* tag 'dma-mapping-5.10-2' of git://git.infradead.org/users/hch/dma-mapping:
  dma-mapping: fix 32-bit overflow with CONFIG_ARM_LPAE=n

Commit: bb3540be73ca1e483aa977d859960895fe85372d
Parents: 67ff377b · 48ab6d5d

Merge commit. Changes below are compared with the first parent: 67ff377b.

Changes

1 files changed · +3 −3

File	Status	Add	Del	Content
drivers/of/device.c	modified	+3	−3	View file

drivers/of/device.c

View file

diff --git a/drivers/of/device.c b/drivers/of/device.c
index 655dee4..3a469c7 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -93,7 +93,7 @@ int of_dma_configure_id(struct device *dev, struct device_node *np,
 {
 	const struct iommu_ops *iommu;
 	const struct bus_dma_region *map = NULL;
-	dma_addr_t dma_start = 0;
+	u64 dma_start = 0;
 	u64 mask, end, size = 0;
 	bool coherent;
 	int ret;
@@ -109,10 +109,10 @@ int of_dma_configure_id(struct device *dev, struct device_node *np,
 			return ret == -ENODEV ? 0 : ret;
 	} else {
 		const struct bus_dma_region *r = map;
-		dma_addr_t dma_end = 0;
+		u64 dma_end = 0;
 
 		/* Determine the overall bounds of all DMA regions */
-		for (dma_start = ~(dma_addr_t)0; r->size; r++) {
+		for (dma_start = ~0ULL; r->size; r++) {
 			/* Take lower and upper limits */
 			if (r->dma_start < dma_start)
 				dma_start = r->dma_start;