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[S390] dasd: fix reference counting in display method for proc/dasd/devices
Using the /proc/dasd/devices interface leaves the reference counter of alias devices in an inconsistent state. A process that tries to set such a device offline afterwards will hang. The dasd_devices_show function returns immediately for alias devices and this code path was missing a dasd_put_device call. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -62,8 +62,10 @@ dasd_devices_show(struct seq_file *m, void *v)
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return 0;
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if (device->block)
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block = device->block;
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else
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else {
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dasd_put_device(device);
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return 0;
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}
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/* Print device number. */
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seq_printf(m, "%s", device->cdev->dev.bus_id);
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/* Print discipline string. */
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