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sercomm: busy-wait in case we cannot allocate a msgb right now

This commit is contained in:
Harald Welte 2010-02-21 18:36:22 +01:00
parent 30ed24b0a4
commit c917fd4379
1 changed files with 10 additions and 10 deletions
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20
src/target/firmware/comm/msgb.c
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@ -48,20 +48,21 @@ static void *_talloc_zero(void *ctx, unsigned int size, const char *name)
unsigned int i;
if (size > sizeof(struct msgb) + MSGB_DATA_SIZE)
goto panic;
for (i = 0; i < ARRAY_SIZE(msgs); i++) {
if (!msgs[i].allocated) {
msgs[i].allocated = 1;
memset(&msgs[i].msg, 0, sizeof(&msgs[i].msg));
memset(&msgs[i].buf, 0, sizeof(&msgs[i].buf));
return &msgs[i].msg;
}
}
panic:
while (1) {
for (i = 0; i < ARRAY_SIZE(msgs); i++) {
if (!msgs[i].allocated) {
msgs[i].allocated = 1;
memset(&msgs[i].msg, 0, sizeof(&msgs[i].msg));
memset(&msgs[i].buf, 0, sizeof(&msgs[i].buf));
return &msgs[i].msg;
}
}
cons_puts("unable to allocate msgb\n");
bl_level(++i % 50);
delay_ms(50);
}
panic:
return NULL;
}
static void talloc_free(void *msg)
@ -78,7 +79,6 @@ struct msgb *msgb_alloc(uint16_t size, const char *name)
msg = _talloc_zero(tall_msgb_ctx, sizeof(*msg) + size, name);
if (!msg) {
cons_puts("unable to allocate msgb\n");
return NULL;
}