Merge: ice: fix NULL access of tx->in_use

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/7313

JIRA: https://issues.redhat.com/browse/RHEL-84608

ice: fix NULL access of tx->in_use

Signed-off-by: Petr Oros <poros@redhat.com>

Approved-by: Michal Schmidt <mschmidt@redhat.com>
Approved-by: Kamal Heib <kheib@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: CKI GitLab Kmaint Pipeline Bot <26919896-cki-kmaint-pipeline-bot@users.noreply.gitlab.com>

Author: CKI KWF Bot

drivers/net/ethernet/intel/ice/ice_main.c

@@ -3230,12 +3230,14 @@ static irqreturn_t ice_ll_ts_intr(int __always_unused irq, void *data)
 	hw = &pf->hw;
 	tx = &pf->ptp.port.tx;
 	spin_lock_irqsave(&tx->lock, flags);
-	ice_ptp_complete_tx_single_tstamp(tx);
+	if (tx->init) {
+		ice_ptp_complete_tx_single_tstamp(tx);
 
-	idx = find_next_bit_wrap(tx->in_use, tx->len,
-				 tx->last_ll_ts_idx_read + 1);
-	if (idx != tx->len)
-		ice_ptp_req_tx_single_tstamp(tx, idx);
+		idx = find_next_bit_wrap(tx->in_use, tx->len,
+					 tx->last_ll_ts_idx_read + 1);
+		if (idx != tx->len)
+			ice_ptp_req_tx_single_tstamp(tx, idx);
+	}
 	spin_unlock_irqrestore(&tx->lock, flags);
 
 	val = GLINT_DYN_CTL_INTENA_M | GLINT_DYN_CTL_CLEARPBA_M |

drivers/net/ethernet/intel/ice/ice_ptp.c

@@ -2882,16 +2882,19 @@ irqreturn_t ice_ptp_ts_irq(struct ice_pf *pf)
 		 */
 		if (hw->dev_caps.ts_dev_info.ts_ll_int_read) {
 			struct ice_ptp_tx *tx = &pf->ptp.port.tx;
-			u8 idx;
+			u8 idx, last;
 
 			if (!ice_pf_state_is_nominal(pf))
 				return IRQ_HANDLED;
 
 			spin_lock(&tx->lock);
-			idx = find_next_bit_wrap(tx->in_use, tx->len,
-						 tx->last_ll_ts_idx_read + 1);
-			if (idx != tx->len)
-				ice_ptp_req_tx_single_tstamp(tx, idx);
+			if (tx->init) {
+				last = tx->last_ll_ts_idx_read + 1;
+				idx = find_next_bit_wrap(tx->in_use, tx->len,
+							 last);
+				if (idx != tx->len)
+					ice_ptp_req_tx_single_tstamp(tx, idx);
+			}
 			spin_unlock(&tx->lock);
 
 			return IRQ_HANDLED;