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authorKees Cook <keescook@chromium.org>2016-07-29 18:11:32 -0700
committerKees Cook <keescook@chromium.org>2016-08-05 11:21:36 -0700
commit529182e204db083cb7bda832d1c5c6d9278ba1cb (patch)
treeb923eedd4b5a1e2d6cdda1af5c8bfd3b18b17189 /fs
parentf38d2e5313f0af9d9b66c02a5d49c71deb994b85 (diff)
downloadlinux-529182e204db083cb7bda832d1c5c6d9278ba1cb.tar.bz2
ramoops: use DT reserved-memory bindings
Instead of a ramoops-specific node, use a child node of /reserved-memory. This requires that of_platform_device_create() be explicitly called for the node, though, since "/reserved-memory" does not have its own "compatible" property. Suggested-by: Rob Herring <robh@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/pstore/ram.c23
1 files changed, 7 insertions, 16 deletions
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 47516a794011..427eee7570bb 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -486,30 +486,21 @@ static int ramoops_parse_dt(struct platform_device *pdev,
struct ramoops_platform_data *pdata)
{
struct device_node *of_node = pdev->dev.of_node;
- struct device_node *mem_region;
- struct resource res;
+ struct resource *res;
u32 value;
int ret;
dev_dbg(&pdev->dev, "using Device Tree\n");
- mem_region = of_parse_phandle(of_node, "memory-region", 0);
- if (!mem_region) {
- dev_err(&pdev->dev, "no memory-region phandle\n");
- return -ENODEV;
- }
-
- ret = of_address_to_resource(mem_region, 0, &res);
- of_node_put(mem_region);
- if (ret) {
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
dev_err(&pdev->dev,
- "failed to translate memory-region to resource: %d\n",
- ret);
- return ret;
+ "failed to locate DT /reserved-memory resource\n");
+ return -EINVAL;
}
- pdata->mem_size = resource_size(&res);
- pdata->mem_address = res.start;
+ pdata->mem_size = resource_size(res);
+ pdata->mem_address = res->start;
pdata->mem_type = of_property_read_bool(of_node, "unbuffered");
pdata->dump_oops = !of_property_read_bool(of_node, "no-dump-oops");