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libfdt: Add new errors for the overlay code

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Add a few new error codes to report the failure conditions we might
encounter in the overlay application code:
   - FDT_ERR_BADOVERLAY, when an overlay cannot be parsed, even though its
     structure is correct
   - FDT_ERR_NOPHANDLES, when we ran out of available phandles and we
     cannot use a new phandle without either using an invalid one (-1 or
     0), or one already used.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Maxime Ripard 2016-09-30 15:57:14 +02:00 • committed by David Gibson
parent 6d1832c9e6
commit 4aa3a6f5e6
2 changed files with 13 additions and 1 deletions
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3
libfdt/fdt_strerror.c
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@ -76,6 +76,9 @@ static struct fdt_errtabent fdt_errtable[] = {
FDT_ERRTABENT(FDT_ERR_BADVERSION), FDT_ERRTABENT(FDT_ERR_BADVERSION),
FDT_ERRTABENT(FDT_ERR_BADSTRUCTURE), FDT_ERRTABENT(FDT_ERR_BADSTRUCTURE),
FDT_ERRTABENT(FDT_ERR_BADLAYOUT), FDT_ERRTABENT(FDT_ERR_BADLAYOUT),
FDT_ERRTABENT(FDT_ERR_BADOVERLAY),
FDT_ERRTABENT(FDT_ERR_BADOVERLAY),
FDT_ERRTABENT(FDT_ERR_NOPHANDLES),
}; };
#define FDT_ERRTABSIZE (sizeof(fdt_errtable) / sizeof(fdt_errtable[0])) #define FDT_ERRTABSIZE (sizeof(fdt_errtable) / sizeof(fdt_errtable[0]))

11
libfdt/libfdt.h
View file

@ -126,7 +126,16 @@
* value. For example: a property expected to contain a string list * value. For example: a property expected to contain a string list
* is not NUL-terminated within the length of its value. */ * is not NUL-terminated within the length of its value. */
#define FDT_ERR_MAX 15 #define FDT_ERR_BADOVERLAY 16
/* FDT_ERR_BADOVERLAY: The device tree overlay, while
* correctly structured, cannot be applied due to some
* unexpected or missing value, property or node. */
#define FDT_ERR_NOPHANDLES 17
/* FDT_ERR_NOPHANDLES: The device tree doesn't have any
* phandle available anymore without causing an overflow */
#define FDT_ERR_MAX 17
/**********************************************************************/ /**********************************************************************/
/* Low-level functions (you probably don't need these) */ /* Low-level functions (you probably don't need these) */