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Devicetree fixes for 4.20-rc:

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- Add validation of NUMA distance map to prevent crashes with bad map
 
 - Fix setting of dma_mask
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Merge tag 'devicetree-fixes-for-4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull Devicetree fixes from Rob Herring:

 - Add validation of NUMA distance map to prevent crashes with bad map

 - Fix setting of dma_mask

* tag 'devicetree-fixes-for-4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  of, numa: Validate some distance map rules
  of/device: Really only set bus DMA mask when appropriate
This commit is contained in:
Linus Torvalds 2018-11-09 16:41:58 -06:00
commit aa4330e15c
2 changed files with 10 additions and 3 deletions
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4
drivers/of/device.c
View File

@ -149,9 +149,11 @@ int of_dma_configure(struct device *dev, struct device_node *np, bool force_dma)
* set by the driver.
*/
mask = DMA_BIT_MASK(ilog2(dma_addr + size - 1) + 1);
dev->bus_dma_mask = mask;
dev->coherent_dma_mask &= mask;
*dev->dma_mask &= mask;
/* ...but only set bus mask if we found valid dma-ranges earlier */
if (!ret)
dev->bus_dma_mask = mask;
coherent = of_dma_is_coherent(np);
dev_dbg(dev, "device is%sdma coherent\n",

9
drivers/of/of_numa.c
View File

@ -104,9 +104,14 @@ static int __init of_numa_parse_distance_map_v1(struct device_node *map)
distance = of_read_number(matrix, 1);
matrix++;
if ((nodea == nodeb && distance != LOCAL_DISTANCE) ||
(nodea != nodeb && distance <= LOCAL_DISTANCE)) {
pr_err("Invalid distance[node%d -> node%d] = %d\n",
nodea, nodeb, distance);
return -EINVAL;
}
numa_set_distance(nodea, nodeb, distance);
pr_debug("distance[node%d -> node%d] = %d\n",
nodea, nodeb, distance);
/* Set default distance of node B->A same as A->B */
if (nodeb > nodea)