Merge "msm: ipa3: add lock for num_q6_rule" (6e2982a7) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/platform/msm/ipa/ipa_v3/rmnet_ipa.c

+10 −1

Original line number	Diff line number	Diff line
		@@ -538,6 +538,8 @@ int ipa3_copy_ul_filter_rule_to_ipa(struct ipa_install_fltr_rule_req_msg_v01
		{
		int i;

		/* prevent multi-threads accessing rmnet_ipa3_ctx->num_q6_rules */
		mutex_lock(&rmnet_ipa3_ctx->add_mux_channel_lock);
		if (rule_req->filter_spec_ex_list_valid == true) {
		rmnet_ipa3_ctx->num_q6_rules =
		rule_req->filter_spec_ex_list_len;
		@@ -546,6 +548,7 @@ int ipa3_copy_ul_filter_rule_to_ipa(struct ipa_install_fltr_rule_req_msg_v01
		} else {
		rmnet_ipa3_ctx->num_q6_rules = 0;
		IPAWANERR("got no UL rules from modem\n");
		mutex_unlock(&rmnet_ipa3_ctx->add_mux_channel_lock);
		return -EINVAL;
		}

		@@ -597,9 +600,11 @@ int ipa3_copy_ul_filter_rule_to_ipa(struct ipa_install_fltr_rule_req_msg_v01
		rmnet_ipa3_ctx->num_q6_rules = 0;
		memset(ipa3_qmi_ctx->q6_ul_filter_rule, 0,
		sizeof(ipa3_qmi_ctx->q6_ul_filter_rule));
		mutex_unlock(&rmnet_ipa3_ctx->add_mux_channel_lock);
		return -EINVAL;

		success:
		mutex_unlock(&rmnet_ipa3_ctx->add_mux_channel_lock);
		return 0;
		}

		@@ -1393,8 +1398,12 @@ static int handle3_egress_format(struct net_device *dev,

		if (rmnet_ipa3_ctx->num_q6_rules != 0) {
		/* already got Q6 UL filter rules*/
		if (ipa3_qmi_ctx->modem_cfg_emb_pipe_flt == false)
		if (ipa3_qmi_ctx->modem_cfg_emb_pipe_flt == false) {
		/* prevent multi-threads accessing num_q6_rules */
		mutex_lock(&rmnet_ipa3_ctx->add_mux_channel_lock);
		rc = ipa3_wwan_add_ul_flt_rule_to_ipa();
		mutex_unlock(&rmnet_ipa3_ctx->add_mux_channel_lock);
		}
		if (rc)
		IPAWANERR("install UL rules failed\n");
		else