diff options
author | Andre Przywara <andre.przywara@arm.com> | 2020-10-01 17:46:29 +0100 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2021-12-14 16:00:44 +0100 |
commit | 140935c56093dfe7d5d35aca9d357df5964ed1d3 (patch) | |
tree | 954591da962422439af1028bef2df7b0fd779793 /cpukit/dtc/libfdt | |
parent | libfdt: libfdt_wip: Fix comparison warning (diff) | |
download | rtems-140935c56093dfe7d5d35aca9d357df5964ed1d3.tar.bz2 |
libfdt: fdt_get_string(): Fix sequential write comparison warnings
With -Wsign-compare, compilers warn about a mismatching signedness in
comparisons in fdt_get_string().
Introduce a new usigned variable, which holds the actual (negated)
stroffset value, so we avoid negating all the other variables and have
proper types everywhere.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Message-Id: <20201001164630.4980-6-andre.przywara@arm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'cpukit/dtc/libfdt')
-rw-r--r-- | cpukit/dtc/libfdt/fdt_ro.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/cpukit/dtc/libfdt/fdt_ro.c b/cpukit/dtc/libfdt/fdt_ro.c index e19218422f..91cc6fefe3 100644 --- a/cpukit/dtc/libfdt/fdt_ro.c +++ b/cpukit/dtc/libfdt/fdt_ro.c @@ -67,11 +67,13 @@ const char *fdt_get_string(const void *fdt, int stroffset, int *lenp) len = fdt_size_dt_strings(fdt) - stroffset; } } else if (fdt_magic(fdt) == FDT_SW_MAGIC) { - if ((stroffset >= 0) - || (stroffset < -fdt_size_dt_strings(fdt))) + unsigned int sw_stroffset = -stroffset; + + if ((stroffset >= 0) || + (sw_stroffset > fdt_size_dt_strings(fdt))) goto fail; - if ((-stroffset) < len) - len = -stroffset; + if (sw_stroffset < len) + len = sw_stroffset; } else { err = -FDT_ERR_INTERNAL; goto fail; |