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system_information: Fix BCCH Allocation when only 1 BTS present 

The current code used the variable bitmap format, but
that's not possible since in this format the base ARFCN is
part of the set. That lead to a neighbor list containing ARFCN 0.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
This commit is contained in:
Sylvain Munaut 2009-12-24 14:20:19 +01:00 committed by Harald Welte
parent d6c35f6e8a
commit 42a5652eb2
1 changed files with 7 additions and 1 deletions
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8
openbsc/src/system_information.c
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@ -98,7 +98,7 @@ static int freq_list_bmrel_set_arfcn(u_int8_t *chan_list, unsigned int arfcn)
static int bitvec2freq_list(u_int8_t *chan_list, struct bitvec *bv,
const struct gsm_bts *bts)
{
int i, rc, min = 1024, max = 0;
int i, rc, min = 1024, max = -1;
memset(chan_list, 0, 16);
@ -128,6 +128,12 @@ static int bitvec2freq_list(u_int8_t *chan_list, struct bitvec *bv,
}
}
if (max == -1) {
/* Empty set, use 'bit map 0 format' */
chan_list[0] = 0;
return 0;
}
if ((max - min) > 111) {
LOGP(DRR, LOGL_ERROR, "min_arfcn=%u, max_arfcn=%u, "
"distance > 111\n", min, max);