提交 931bb68b 编写于 作者: G Gerald Schaefer 提交者: Martin Schwidefsky

[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: NGerald Schaefer <geraldsc@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
上级 0fc3ddd6
......@@ -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 @@ dcssblk_shared_store(struct device *dev, struct device_attribute *attr, const ch
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;
......
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