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| author | Simon Glass <sjg@chromium.org> | 2021-12-08 19:55:35 +0300 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2021-12-17 19:44:59 +0300 |
| commit | 121cfe5a84d463893bd01da16417ab138f98666a (patch) | |
| tree | 0d7723140a0fb6e4bd81656a89296d85e6a36d24 /include/fdt_region.h | |
| parent | 70ab7b1799112398047be63cc113f93955f0f352 (diff) | |
| download | u-boot-121cfe5a84d463893bd01da16417ab138f98666a.tar.xz | |
fdtgrep: Handle an empty output tree
In strange cases it is possible for fdtgrep to find nothing to output.
Typically this means that the resulting SPL device tree is not going to
allow anything to boot, but at present the tree is actually invalid,
since it only has an END tag in the struct region.
The FDT spec requires at least a root node. So add a special case to
include at least this, if the FDT_REG_SUPERNODES flag is set.
This ensures that grepping an empty tree still produces a valid tree.
Also add comments to the enum since it is not completely obvious from
the names now.
The typical symptom of this problem is a message from binman:
pylibfdt error -11: FDT_ERR_BADSTRUCTURE
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/fdt_region.h')
| -rw-r--r-- | include/fdt_region.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/fdt_region.h b/include/fdt_region.h index ff7a1ccb9a..d0c68760f7 100644 --- a/include/fdt_region.h +++ b/include/fdt_region.h @@ -77,6 +77,7 @@ struct fdt_region_state { int max_regions; /* Maximum regions to find */ int can_merge; /* 1 if we can merge with previous region */ int start; /* Start position of current region */ + bool have_node; /* True if any node is included */ struct fdt_region_ptrs ptrs; /* Pointers for what we are up to */ }; |