lincan/src/finish.c

   1 /* finish.c - finalization of the driver operation
   2  * Linux CAN-bus device driver.
   3  * Written by Arnaud Westenberg email:arnaud@wanadoo.nl
   4  * Rewritten for new CAN queues by Pavel Pisa - OCERA team member
   5  * email:pisa@cmp.felk.cvut.cz
   6  * This software is released under the GPL-License.
   7  * Version lincan-0.3  17 Jun 2004
   8  */
   9
  10 #include "../include/can.h"
  11 #include "../include/can_sysdep.h"
  12 #include "../include/main.h"
  13 #include "../include/devcommon.h"
  14 #include "../include/finish.h"
  15 #include "../include/setup.h"
  16
  17
  18 /**
  19  * msgobj_done - destroys one CAN message object
  20  * @obj: pointer to CAN message object structure
  21  */
  22 void msgobj_done(struct msgobj_t *obj)
  23 {
  24         int delayed=0;
  25         if(obj->qends) {
  26                 delayed=canqueue_ends_done_chip(obj->qends);
  27                 if(delayed < 0)
  28                         CANMSG("msgobj_done: problem with chip queue ends\n");
  29         }
  30
  31         if((obj->hostchip) && (obj->object>0)) {
  32                 if(obj->hostchip->msgobj[obj->object-1] == obj)
  33                         obj->hostchip->msgobj[obj->object-1]=NULL;
  34                 else
  35                         CANMSG("msgobj_done: not registered in the canchip_t\n");
  36                 obj->hostchip=NULL;
  37         }
  38
  39         if((obj->minor>=0)) {
  40                 if(objects_p[obj->minor] == obj)
  41                         objects_p[obj->minor] = NULL;
  42                 else
  43                         CANMSG("msgobj_done: not registered as minor\n");
  44         }
  45
  46         del_timer_sync(&obj->tx_timeout);
  47
  48         if(obj->qends) {
  49                 /*delayed free could be required there in the future,
  50                   actual use patter cannot generate such situation*/
  51                 if(!delayed) {
  52                         can_checked_free(obj->qends);
  53                 }
  54         }
  55         obj->qends=NULL;
  56 }
  57
  58
  59 /**
  60  * canchip_done - destroys one CAN chip representation
  61  * @chip: pointer to CAN chip structure
  62  */
  63 void canchip_done(struct canchip_t *chip)
  64 {
  65
  66         int i;
  67         struct msgobj_t *obj;
  68
  69         if(chip->flags & CHIP_ATTACHED){
  70                 chip->chipspecops->release_chip(chip);
  71                 chip->flags &= ~CHIP_ATTACHED;
  72         }
  73
  74         if((chip->hostdevice) && (chip->chip_idx>=0)) {
  75                 if(chip->hostdevice->chip[chip->chip_idx] == chip)
  76                         chip->hostdevice->chip[chip->chip_idx] = NULL;
  77                 else
  78                         CANMSG("canchip_done: not registered in hostdevice\n");
  79         }
  80
  81         can_chip_free_irq(chip);
  82
  83         can_synchronize_irq(chip->chip_irq);
  84
  85         for(i=0; i<chip->max_objects; i++){
  86                 if((obj=chip->msgobj[i])==NULL)
  87                         continue;
  88                 msgobj_done(obj);
  89                 can_checked_free(obj);
  90         }
  91
  92         can_checked_free(chip->chipspecops);
  93         chip->chipspecops=NULL;
  94
  95 }
  96
  97 /**
  98  * candevice_done - destroys representation of one CAN device/board
  99  * @candev: pointer to CAN device/board structure
 100  */
 101 void candevice_done(struct candevice_t *candev)
 102 {
 103         int i;
 104         struct canchip_t *chip;
 105
 106         for(i=0; i<candev->nr_all_chips; i++){
 107                 if((chip=candev->chip[i])==NULL)
 108                         continue;
 109                 canchip_done(chip);
 110                 can_checked_free(chip);
 111
 112         }
 113         if(candev->flags & CANDEV_IO_RESERVED) {
 114                 candev->hwspecops->release_io(candev);
 115                 candev->flags &= ~CANDEV_IO_RESERVED;
 116         }
 117         can_checked_free(candev->hwspecops);
 118         candev->hwspecops=NULL;
 119 }
 120
 121 /**
 122  * candevice_done - destroys representation of all CAN devices/boards
 123  * @canhw: pointer to the root of all CAN hardware representation
 124  */
 125 void canhardware_done(struct canhardware_t *canhw)
 126 {
 127         int i;
 128         struct candevice_t *candev;
 129
 130         for(i=0; i<canhw->nr_boards; i++){
 131                 if((candev=canhw->candevice[i])==NULL)
 132                         continue;
 133                 candevice_done(candev);
 134                 can_checked_free(candev);
 135         }
 136
 137 }