mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 10:26:42 +07:00
566f26aa70
The dereference should be moved below the NULL test. spatch with a semantic match is used to found this. (http://coccinelle.lip6.fr/) Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: David S. Miller <davem@davemloft.net>
222 lines
5.5 KiB
C
222 lines
5.5 KiB
C
/*
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* Copyright (C) ST-Ericsson AB 2010
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* Author: Sjur Brendeland/sjur.brandeland@stericsson.com
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* License terms: GNU General Public License (GPL) version 2
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/pkt_sched.h>
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#include <net/caif/caif_layer.h>
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#include <net/caif/cfsrvl.h>
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#include <net/caif/cfpkt.h>
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#define SRVL_CTRL_PKT_SIZE 1
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#define SRVL_FLOW_OFF 0x81
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#define SRVL_FLOW_ON 0x80
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#define SRVL_SET_PIN 0x82
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#define SRVL_CTRL_PKT_SIZE 1
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#define container_obj(layr) container_of(layr, struct cfsrvl, layer)
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static void cfservl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
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int phyid)
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{
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struct cfsrvl *service = container_obj(layr);
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if (layr->up == NULL || layr->up->ctrlcmd == NULL)
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return;
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switch (ctrl) {
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case CAIF_CTRLCMD_INIT_RSP:
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service->open = true;
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layr->up->ctrlcmd(layr->up, ctrl, phyid);
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break;
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case CAIF_CTRLCMD_DEINIT_RSP:
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case CAIF_CTRLCMD_INIT_FAIL_RSP:
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service->open = false;
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layr->up->ctrlcmd(layr->up, ctrl, phyid);
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break;
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case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND:
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if (phyid != service->dev_info.id)
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break;
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if (service->modem_flow_on)
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layr->up->ctrlcmd(layr->up,
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CAIF_CTRLCMD_FLOW_OFF_IND, phyid);
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service->phy_flow_on = false;
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break;
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case _CAIF_CTRLCMD_PHYIF_FLOW_ON_IND:
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if (phyid != service->dev_info.id)
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return;
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if (service->modem_flow_on) {
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layr->up->ctrlcmd(layr->up,
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CAIF_CTRLCMD_FLOW_ON_IND,
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phyid);
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}
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service->phy_flow_on = true;
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break;
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case CAIF_CTRLCMD_FLOW_OFF_IND:
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if (service->phy_flow_on) {
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layr->up->ctrlcmd(layr->up,
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CAIF_CTRLCMD_FLOW_OFF_IND, phyid);
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}
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service->modem_flow_on = false;
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break;
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case CAIF_CTRLCMD_FLOW_ON_IND:
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if (service->phy_flow_on) {
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layr->up->ctrlcmd(layr->up,
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CAIF_CTRLCMD_FLOW_ON_IND, phyid);
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}
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service->modem_flow_on = true;
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break;
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case _CAIF_CTRLCMD_PHYIF_DOWN_IND:
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/* In case interface is down, let's fake a remove shutdown */
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layr->up->ctrlcmd(layr->up,
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CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND, phyid);
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break;
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case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND:
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layr->up->ctrlcmd(layr->up, ctrl, phyid);
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break;
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default:
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pr_warn("Unexpected ctrl in cfsrvl (%d)\n", ctrl);
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/* We have both modem and phy flow on, send flow on */
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layr->up->ctrlcmd(layr->up, ctrl, phyid);
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service->phy_flow_on = true;
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break;
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}
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}
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static int cfservl_modemcmd(struct cflayer *layr, enum caif_modemcmd ctrl)
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{
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struct cfsrvl *service = container_obj(layr);
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caif_assert(layr != NULL);
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caif_assert(layr->dn != NULL);
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caif_assert(layr->dn->transmit != NULL);
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if (!service->supports_flowctrl)
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return 0;
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switch (ctrl) {
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case CAIF_MODEMCMD_FLOW_ON_REQ:
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{
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struct cfpkt *pkt;
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struct caif_payload_info *info;
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u8 flow_on = SRVL_FLOW_ON;
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pkt = cfpkt_create(SRVL_CTRL_PKT_SIZE);
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if (!pkt)
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return -ENOMEM;
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if (cfpkt_add_head(pkt, &flow_on, 1) < 0) {
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pr_err("Packet is erroneous!\n");
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cfpkt_destroy(pkt);
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return -EPROTO;
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}
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info = cfpkt_info(pkt);
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info->channel_id = service->layer.id;
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info->hdr_len = 1;
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info->dev_info = &service->dev_info;
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cfpkt_set_prio(pkt, TC_PRIO_CONTROL);
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return layr->dn->transmit(layr->dn, pkt);
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}
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case CAIF_MODEMCMD_FLOW_OFF_REQ:
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{
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struct cfpkt *pkt;
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struct caif_payload_info *info;
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u8 flow_off = SRVL_FLOW_OFF;
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pkt = cfpkt_create(SRVL_CTRL_PKT_SIZE);
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if (!pkt)
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return -ENOMEM;
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if (cfpkt_add_head(pkt, &flow_off, 1) < 0) {
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pr_err("Packet is erroneous!\n");
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cfpkt_destroy(pkt);
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return -EPROTO;
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}
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info = cfpkt_info(pkt);
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info->channel_id = service->layer.id;
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info->hdr_len = 1;
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info->dev_info = &service->dev_info;
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cfpkt_set_prio(pkt, TC_PRIO_CONTROL);
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return layr->dn->transmit(layr->dn, pkt);
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}
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default:
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break;
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}
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return -EINVAL;
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}
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static void cfsrvl_release(struct cflayer *layer)
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{
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struct cfsrvl *service = container_of(layer, struct cfsrvl, layer);
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kfree(service);
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}
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void cfsrvl_init(struct cfsrvl *service,
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u8 channel_id,
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struct dev_info *dev_info,
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bool supports_flowctrl
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)
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{
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caif_assert(offsetof(struct cfsrvl, layer) == 0);
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service->open = false;
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service->modem_flow_on = true;
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service->phy_flow_on = true;
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service->layer.id = channel_id;
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service->layer.ctrlcmd = cfservl_ctrlcmd;
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service->layer.modemcmd = cfservl_modemcmd;
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service->dev_info = *dev_info;
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service->supports_flowctrl = supports_flowctrl;
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service->release = cfsrvl_release;
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}
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bool cfsrvl_ready(struct cfsrvl *service, int *err)
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{
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if (!service->open) {
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*err = -ENOTCONN;
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return false;
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}
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return true;
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}
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u8 cfsrvl_getphyid(struct cflayer *layer)
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{
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struct cfsrvl *servl = container_obj(layer);
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return servl->dev_info.id;
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}
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bool cfsrvl_phyid_match(struct cflayer *layer, int phyid)
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{
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struct cfsrvl *servl = container_obj(layer);
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return servl->dev_info.id == phyid;
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}
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void caif_free_client(struct cflayer *adap_layer)
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{
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struct cfsrvl *servl;
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if (adap_layer == NULL || adap_layer->dn == NULL)
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return;
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servl = container_obj(adap_layer->dn);
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servl->release(&servl->layer);
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}
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EXPORT_SYMBOL(caif_free_client);
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void caif_client_register_refcnt(struct cflayer *adapt_layer,
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void (*hold)(struct cflayer *lyr),
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void (*put)(struct cflayer *lyr))
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{
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struct cfsrvl *service;
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if (WARN_ON(adapt_layer == NULL || adapt_layer->dn == NULL))
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return;
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service = container_of(adapt_layer->dn, struct cfsrvl, layer);
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service->hold = hold;
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service->put = put;
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}
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EXPORT_SYMBOL(caif_client_register_refcnt);
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