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[S390] device_schedule_callback() for dcssblk. 

Unregistering a device from within a device attribute handler leads to
a deadlock. Need to use device_schedule_callback() to unregister device
in error path.

Signed-off-by: Gerald Schaefer <geraldsc@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Gerald Schaefer 2007-11-05 11:10:09 +01:00 committed by Martin Schwidefsky
parent 0fc3ddd67a
commit 931bb68ba6
1 changed files with 7 additions and 2 deletions
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9
drivers/s390/block/dcssblk.c
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@ -193,6 +193,12 @@ dcssblk_segment_warn(int rc, char* seg_name)
}
}
static void dcssblk_unregister_callback(struct device *dev)
{
device_unregister(dev);
put_device(dev);
}
/*
* device attribute for switching shared/nonshared (exclusive)
* operation (show + store)
@ -276,8 +282,7 @@ removeseg:
blk_cleanup_queue(dev_info->dcssblk_queue);
dev_info->gd->queue = NULL;
put_disk(dev_info->gd);
device_unregister(dev);
put_device(dev);
rc = device_schedule_callback(dev, dcssblk_unregister_callback);
out:
up_write(&dcssblk_devices_sem);
return rc;