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author | J. Bruce Fields <bfields@redhat.com> | 2010-12-17 13:29:07 -0500 |
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committer | J. Bruce Fields <bfields@redhat.com> | 2010-12-17 13:29:07 -0500 |
commit | ec66ee3797e5848356cf593c6ec7aabf30a00cf1 (patch) | |
tree | 7ed5c84cc914644ffa1cd1b6a2b45db53fc224e8 /drivers/s390/char/tape_core.c | |
parent | 1205065764f2eda3216ebe213143f69891ee3460 (diff) | |
parent | b0c3844d8af6b9f3f18f31e1b0502fbefa2166be (diff) | |
download | op-kernel-dev-ec66ee3797e5848356cf593c6ec7aabf30a00cf1.zip op-kernel-dev-ec66ee3797e5848356cf593c6ec7aabf30a00cf1.tar.gz |
Merge commit 'v2.6.37-rc6' into for-2.6.38
Diffstat (limited to 'drivers/s390/char/tape_core.c')
-rw-r--r-- | drivers/s390/char/tape_core.c | 68 |
1 files changed, 59 insertions, 9 deletions
diff --git a/drivers/s390/char/tape_core.c b/drivers/s390/char/tape_core.c index 6c40867..b3a3e8e 100644 --- a/drivers/s390/char/tape_core.c +++ b/drivers/s390/char/tape_core.c @@ -209,29 +209,79 @@ tape_state_set(struct tape_device *device, enum tape_state newstate) wake_up(&device->state_change_wq); } +struct tape_med_state_work_data { + struct tape_device *device; + enum tape_medium_state state; + struct work_struct work; +}; + +static void +tape_med_state_work_handler(struct work_struct *work) +{ + static char env_state_loaded[] = "MEDIUM_STATE=LOADED"; + static char env_state_unloaded[] = "MEDIUM_STATE=UNLOADED"; + struct tape_med_state_work_data *p = + container_of(work, struct tape_med_state_work_data, work); + struct tape_device *device = p->device; + char *envp[] = { NULL, NULL }; + + switch (p->state) { + case MS_UNLOADED: + pr_info("%s: The tape cartridge has been successfully " + "unloaded\n", dev_name(&device->cdev->dev)); + envp[0] = env_state_unloaded; + kobject_uevent_env(&device->cdev->dev.kobj, KOBJ_CHANGE, envp); + break; + case MS_LOADED: + pr_info("%s: A tape cartridge has been mounted\n", + dev_name(&device->cdev->dev)); + envp[0] = env_state_loaded; + kobject_uevent_env(&device->cdev->dev.kobj, KOBJ_CHANGE, envp); + break; + default: + break; + } + tape_put_device(device); + kfree(p); +} + +static void +tape_med_state_work(struct tape_device *device, enum tape_medium_state state) +{ + struct tape_med_state_work_data *p; + + p = kzalloc(sizeof(*p), GFP_ATOMIC); + if (p) { + INIT_WORK(&p->work, tape_med_state_work_handler); + p->device = tape_get_device(device); + p->state = state; + schedule_work(&p->work); + } +} + void tape_med_state_set(struct tape_device *device, enum tape_medium_state newstate) { - if (device->medium_state == newstate) + enum tape_medium_state oldstate; + + oldstate = device->medium_state; + if (oldstate == newstate) return; + device->medium_state = newstate; switch(newstate){ case MS_UNLOADED: device->tape_generic_status |= GMT_DR_OPEN(~0); - if (device->medium_state == MS_LOADED) - pr_info("%s: The tape cartridge has been successfully " - "unloaded\n", dev_name(&device->cdev->dev)); + if (oldstate == MS_LOADED) + tape_med_state_work(device, MS_UNLOADED); break; case MS_LOADED: device->tape_generic_status &= ~GMT_DR_OPEN(~0); - if (device->medium_state == MS_UNLOADED) - pr_info("%s: A tape cartridge has been mounted\n", - dev_name(&device->cdev->dev)); + if (oldstate == MS_UNLOADED) + tape_med_state_work(device, MS_LOADED); break; default: - // print nothing break; } - device->medium_state = newstate; wake_up(&device->state_change_wq); } |