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 extern int next_minor;
  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                         if (--next_minor<0)
  43                                 next_minor=0;
  44                 }
  45                 else
  46                         CANMSG("msgobj_done: not registered as minor\n");
  47         }
  48
  49         del_timer_sync(&obj->tx_timeout);
  50
  51         if(obj->qends) {
  52                 /*delayed free could be required there in the future,
  53                   actual use patter cannot generate such situation*/
  54                 if(!delayed) {
  55                         can_checked_free(obj->qends);
  56                 }
  57         }
  58         obj->qends=NULL;
  59 }
  60
  61
  62 /**
  63  * canchip_done - destroys one CAN chip representation
  64  * @chip: pointer to CAN chip structure
  65  */
  66 void canchip_done(struct canchip_t *chip)
  67 {
  68
  69         int i;
  70         struct msgobj_t *obj;
  71
  72         if(chip->flags & CHIP_ATTACHED)
  73                 chip->chipspecops->release_chip(chip);
  74
  75         if((chip->hostdevice) && (chip->chip_idx>=0)) {
  76                 if(chip->hostdevice->chip[chip->chip_idx] == chip)
  77                         chip->hostdevice->chip[chip->chip_idx] = NULL;
  78                 else
  79                         CANMSG("canchip_done: not registered in hostdevice\n");
  80         }
  81
  82         can_chip_free_irq(chip);
  83
  84         can_synchronize_irq(chip->chip_irq);
  85
  86         for(i=0; i<chip->max_objects; i++){
  87                 if((obj=chip->msgobj[i])==NULL)
  88                         continue;
  89                 msgobj_done(obj);
  90                 can_checked_free(obj);
  91         }
  92
  93         can_checked_free(chip->chipspecops);
  94         chip->chipspecops=NULL;
  95
  96 }
  97
  98 /**
  99  * candevice_done - destroys representation of one CAN device/board
 100  * @candev: pointer to CAN device/board structure
 101  */
 102 void candevice_done(struct candevice_t *candev)
 103 {
 104         int i;
 105         struct canchip_t *chip;
 106
 107         for(i=0; i<candev->nr_all_chips; i++){
 108                 if((chip=candev->chip[i])==NULL)
 109                         continue;
 110                 canchip_done(chip);
 111                 can_checked_free(chip);
 112
 113         }
 114         if(candev->flags & CANDEV_IO_RESERVED) {
 115                 candev->hwspecops->release_io(candev);
 116                 candev->flags &= ~CANDEV_IO_RESERVED;
 117         }
 118         can_checked_free(candev->hwspecops);
 119         candev->hwspecops=NULL;
 120 }
 121
 122 /**
 123  * candevice_done - destroys representation of all CAN devices/boards
 124  * @canhw: pointer to the root of all CAN hardware representation
 125  */
 126 void canhardware_done(struct canhardware_t *canhw)
 127 {
 128         int i;
 129         struct candevice_t *candev;
 130
 131         for(i=0; i<MAX_HW_CARDS; i++){
 132                 if((candev=canhw->candevice[i])==NULL)
 133                         continue;
 134                 candevice_done(candev);
 135                 can_checked_free(candev);
 136         }
 137
 138 }