ts_alloc: Simplify tfi_find_free logic

Avoid passing an extra pram which is accessible by GprsMs object already
being passed. Once, the "trx = ms_current_trx(ms)" is moved inside the
tfi_find_free function, it becomes clear that all the logic can be
further simplified.

Change-Id: I733d9bee3fa1dfc647da9f150b30014fbdab7442
Pau Espin 2021-11-09 16:52:31 +01:00
parent fb904fbbd9
commit d9066272ec
1 changed files with 6 additions and 10 deletions

View File

@ -298,20 +298,21 @@ static bool idle_pdch_avail(const struct gprs_rlcmac_bts *bts)
/*! Return free TFI
* \param[in] bts Pointer to BTS struct
* \param[in] trx Optional pointer to TRX struct
* \param[in] ms Pointer to MS object
* \param[in] dir DL or UL direction
* \param[in] use_trx which TRX to use or -1 if it should be selected based on what MS uses
* \param[out] trx_no_ TRX number on which TFI was found
* \returns negative error code or 0 on success
static int tfi_find_free(const struct gprs_rlcmac_bts *bts, const gprs_rlcmac_trx *trx, const GprsMs *ms,
static int tfi_find_free(const struct gprs_rlcmac_bts *bts, const GprsMs *ms,
enum gprs_rlcmac_tbf_direction dir, int8_t use_trx, uint8_t *trx_no_)
const struct gprs_rlcmac_trx *trx;
int tfi;
uint8_t trx_no;
if (trx) {
/* If MS is already doing stuff on a TRX, set use_trx to it: */
if ((trx = ms_current_trx(ms))) {
if (use_trx >= 0 && use_trx != trx->trx_no) {
LOGP(DRLCMAC, LOGL_ERROR, "- Requested incompatible TRX %d (current is %d)\n",
use_trx, trx->trx_no);
@ -320,9 +321,6 @@ static int tfi_find_free(const struct gprs_rlcmac_bts *bts, const gprs_rlcmac_tr
use_trx = trx->trx_no;
if (use_trx == -1 && ms_current_trx(ms))
use_trx = ms_current_trx(ms)->trx_no;
tfi = bts_tfi_find_free(bts, dir, &trx_no, use_trx);
if (tfi < 0)
return -EBUSY;
@ -884,18 +882,16 @@ int alloc_algorithm_b(struct gprs_rlcmac_bts *bts, struct gprs_rlcmac_tbf *tbf,
reserved_dl_slots = ms_reserved_dl_slots(ms);
reserved_ul_slots = ms_reserved_ul_slots(ms);
first_common_ts = ms_first_common_ts(ms);
trx = ms_current_trx(ms);
/* Step 2a: Find usable TRX and TFI */
tfi = tfi_find_free(bts, trx, ms, tbf->direction, use_trx, &trx_no);
tfi = tfi_find_free(bts, ms, tbf->direction, use_trx, &trx_no);
if (tfi < 0) {
LOGPAL(tbf, "B", single, use_trx, LOGL_NOTICE, "failed to allocate a TFI\n");
return tfi;
/* Step 2b: Reserve slots on the TRX for the MS */
if (!trx)
trx = &bts->trx[trx_no];
trx = &bts->trx[trx_no];
if (!reserved_dl_slots || !reserved_ul_slots) {
rc = find_multi_slots(trx, ms_ms_class(ms), &reserved_ul_slots, &reserved_dl_slots);