sr.c (c87866ede44ad7da6b296d732221dc34ce1b154d) sr.c (9c2b9dbafc067e173db30c4fd0636392d27944e8)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * sr.c Copyright (C) 1992 David Giller
4 * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
5 *
6 * adapted from:
7 * sd.c Copyright (C) 1992 Drew Eckhardt
8 * Linux scsi disk driver by

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101 },
102 .init_command = sr_init_command,
103 .done = sr_done,
104};
105
106static unsigned long sr_index_bits[SR_DISKS / BITS_PER_LONG];
107static DEFINE_SPINLOCK(sr_index_lock);
108
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * sr.c Copyright (C) 1992 David Giller
4 * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
5 *
6 * adapted from:
7 * sd.c Copyright (C) 1992 Drew Eckhardt
8 * Linux scsi disk driver by

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101 },
102 .init_command = sr_init_command,
103 .done = sr_done,
104};
105
106static unsigned long sr_index_bits[SR_DISKS / BITS_PER_LONG];
107static DEFINE_SPINLOCK(sr_index_lock);
108
109static struct lock_class_key sr_bio_compl_lkclass;
110
109/* This semaphore is used to mediate the 0->1 reference get in the
110 * face of object destruction (i.e. we can't allow a get on an
111 * object after last put) */
112static DEFINE_MUTEX(sr_ref_mutex);
113
114static int sr_open(struct cdrom_device_info *, int);
115static void sr_release(struct cdrom_device_info *);
116

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216 if (eh->nea || eh->notification_class != 0x4)
217 return 0;
218
219 if (med->media_event_code == 1)
220 return DISK_EVENT_EJECT_REQUEST;
221 else if (med->media_event_code == 2)
222 return DISK_EVENT_MEDIA_CHANGE;
223 else if (med->media_event_code == 3)
111/* This semaphore is used to mediate the 0->1 reference get in the
112 * face of object destruction (i.e. we can't allow a get on an
113 * object after last put) */
114static DEFINE_MUTEX(sr_ref_mutex);
115
116static int sr_open(struct cdrom_device_info *, int);
117static void sr_release(struct cdrom_device_info *);
118

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218 if (eh->nea || eh->notification_class != 0x4)
219 return 0;
220
221 if (med->media_event_code == 1)
222 return DISK_EVENT_EJECT_REQUEST;
223 else if (med->media_event_code == 2)
224 return DISK_EVENT_MEDIA_CHANGE;
225 else if (med->media_event_code == 3)
224 return DISK_EVENT_MEDIA_CHANGE;
226 return DISK_EVENT_EJECT_REQUEST;
225 return 0;
226}
227
228/*
229 * This function checks to see if the media has been changed or eject
230 * button has been pressed. It is possible that we have already
231 * sensed a change, or the drive may have sensed one and not yet
232 * reported it. The past events are accumulated in sdev->changed and

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707
708 error = -ENOMEM;
709 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
710 if (!cd)
711 goto fail;
712
713 kref_init(&cd->kref);
714
227 return 0;
228}
229
230/*
231 * This function checks to see if the media has been changed or eject
232 * button has been pressed. It is possible that we have already
233 * sensed a change, or the drive may have sensed one and not yet
234 * reported it. The past events are accumulated in sdev->changed and

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709
710 error = -ENOMEM;
711 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
712 if (!cd)
713 goto fail;
714
715 kref_init(&cd->kref);
716
715 disk = alloc_disk(1);
717 disk = __alloc_disk_node(1, NUMA_NO_NODE, &sr_bio_compl_lkclass);
716 if (!disk)
717 goto fail_free;
718 mutex_init(&cd->lock);
719
720 spin_lock(&sr_index_lock);
721 minor = find_first_zero_bit(sr_index_bits, SR_DISKS);
722 if (minor == SR_DISKS) {
723 spin_unlock(&sr_index_lock);

--- 352 unchanged lines hidden --- 		718 if (!disk)
719 goto fail_free;
720 mutex_init(&cd->lock);
721
722 spin_lock(&sr_index_lock);
723 minor = find_first_zero_bit(sr_index_bits, SR_DISKS);
724 if (minor == SR_DISKS) {
725 spin_unlock(&sr_index_lock);

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