libfdt: Fix signedness comparison warnings

[J-u-boot.git] / scripts / dtc / libfdt / fdt_ro.c

diff --git a/scripts/dtc/libfdt/fdt_ro.c b/scripts/dtc/libfdt/fdt_ro.c
index d9d52e0d56e6c22dc926584e28513623cabf0fc1..d984bab036b59b365328a7d46fd1b424bee4dc89 100644 (file)
--- a/scripts/dtc/libfdt/fdt_ro.c
+++ b/scripts/dtc/libfdt/fdt_ro.c
@@ -53,7 +53,7 @@ const char *fdt_get_string(const void *fdt, int stroffset, int *lenp)
 
        err = -FDT_ERR_BADOFFSET;
        absoffset = stroffset + fdt_off_dt_strings(fdt);
-       if (absoffset >= totalsize)
+       if (absoffset >= (unsigned)totalsize)
                goto fail;
        len = totalsize - absoffset;
 
@@ -61,17 +61,19 @@ const char *fdt_get_string(const void *fdt, int stroffset, int *lenp)
                if (stroffset < 0)
                        goto fail;
                if (!fdt_chk_version() || fdt_version(fdt) >= 17) {
-                       if (stroffset >= fdt_size_dt_strings(fdt))
+                       if ((unsigned)stroffset >= fdt_size_dt_strings(fdt))
                                goto fail;
                        if ((fdt_size_dt_strings(fdt) - stroffset) < len)
                                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;
@@ -157,8 +159,8 @@ int fdt_generate_phandle(const void *fdt, uint32_t *phandle)
 
 static const struct fdt_reserve_entry *fdt_mem_rsv(const void *fdt, int n)
 {
-       int offset = n * sizeof(struct fdt_reserve_entry);
-       int absoffset = fdt_off_mem_rsvmap(fdt) + offset;
+       unsigned int offset = n * sizeof(struct fdt_reserve_entry);
+       unsigned int absoffset = fdt_off_mem_rsvmap(fdt) + offset;
 
        if (fdt_chk_extra()) {
                if (absoffset < fdt_off_mem_rsvmap(fdt))
@@ -679,7 +681,7 @@ int fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle)
 {
        int offset;
 
-       if ((phandle == 0) || (phandle == -1))
+       if ((phandle == 0) || (phandle == ~0U))
                return -FDT_ERR_BADPHANDLE;
 
        FDT_RO_PROBE(fdt);