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| author |   Stefan Weinhuber <wein@de.ibm.com> | 2008-03-05 12:37:11 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-03-05 12:37:18 +0100 |
| commit | a5e2383991ee985332854b721ba3e5abbbabf0f2 (patch) | |
| tree | 6dee7e87d0fd0a93a041e773684724e6ca9af418 /drivers/s390/block/dasd_proc.c | |
| parent | [S390] dasd: let dasd erp matching recognize alias recovery (diff) | |
| download | linux-dev-a5e2383991ee985332854b721ba3e5abbbabf0f2.tar.xz linux-dev-a5e2383991ee985332854b721ba3e5abbbabf0f2.zip | |
[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>
Diffstat (limited to 'drivers/s390/block/dasd_proc.c')
| -rw-r--r-- | drivers/s390/block/dasd_proc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c index 28a86f070048..556063e8f7a9 100644 --- a/drivers/s390/block/dasd_proc.c +++ b/drivers/s390/block/dasd_proc.c @@ -62,8 +62,10 @@ dasd_devices_show(struct seq_file *m, void *v) return 0; if (device->block) block = device->block; - else + else { + dasd_put_device(device); return 0; + } /* Print device number. */ seq_printf(m, "%s", device->cdev->dev.bus_id); /* Print discipline string. */ |