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dma-mapping fix for 5.10:

Browse Source 
- fix an integer overflow on 32-bit platforms in the new DMA range code
    (Geert Uytterhoeven)
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Merge tag 'dma-mapping-5.10-2' of git://git.infradead.org/users/hch/dma-mapping

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
This commit is contained in:
Linus Torvalds 2020-10-31 12:25:58 -07:00
commit bb3540be73
1 changed files with 3 additions and 3 deletions
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6
drivers/of/device.c
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@ -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;