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dtc: Wrap phandle validity check

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In several places we check for a returned phandle value to be valid,
for that it must not be 0 or "-1".

Wrap this check in a static inline function in dtc.h, and use ~0U instead
of -1 on the way, to keep everything in the unsigned realm.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Message-Id: <20210618172030.9684-4-andre.przywara@arm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Andre Przywara 2021-06-18 18:20:28 +01:00 • committed by David Gibson
parent 9102211855
commit 69bed6c241
3 changed files with 12 additions and 7 deletions
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5
dtc.h
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@ -51,6 +51,11 @@ extern int annotate; /* annotate .dts with input source location */
typedef uint32_t cell_t;
static inline bool phandle_is_valid(cell_t phandle)
{
return phandle != 0 && phandle != ~0U;
}
static inline uint16_t dtb_ld16(const void *p)
{
const uint8_t *bp = (const uint8_t *)p;