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[S390] cio: fix memleak in subchannel validation

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When scanning for new subchannels we have a code path where we allocate
memory for a struct subchannel, set the device name (which is dynamically
allocated now) and do a check if the underlying device is blacklisted - if
so we free the subchannel structure.
Since we have not set up refcounting at this stage, the device name's memory
is lost. Fix this by moving the dev_set_name after the blacklist test.

Note: With this patch the init_name for the console subchannel becomes
virtually obsolete.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2009-09-11 10:28:24 +02:00 committed by Martin Schwidefsky
parent f014824ee7
commit ab6aae0902
2 changed files with 5 additions and 5 deletions
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5
drivers/s390/cio/cio.c
View File

@ -564,11 +564,6 @@ int cio_validate_subchannel(struct subchannel *sch, struct subchannel_id schid)
goto out;
}
mutex_init(&sch->reg_mutex);
/* Set a name for the subchannel */
if (cio_is_console(schid))
sch->dev.init_name = cio_get_console_sch_name(schid);
else
dev_set_name(&sch->dev, "0.%x.%04x", schid.ssid, schid.sch_no);
/*
* The first subchannel that is not-operational (ccode==3)

5
drivers/s390/cio/css.c
View File

@ -183,6 +183,11 @@ static int css_sch_device_register(struct subchannel *sch)
int ret;
mutex_lock(&sch->reg_mutex);
if (cio_is_console(sch->schid))
sch->dev.init_name = cio_get_console_sch_name(sch->schid);
else
dev_set_name(&sch->dev, "0.%x.%04x", sch->schid.ssid,
sch->schid.sch_no);
ret = device_register(&sch->dev);
mutex_unlock(&sch->reg_mutex);
return ret;