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s390/cio: fix memleak in channel measurement 

The measurement block for the extended measurement data is not freed when
switching off per device measurement. Free the measurement block after HW
stopped accessing it.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2015-09-07 19:52:31 +02:00 committed by Martin Schwidefsky
parent 616503d1d8
commit a5e9ca573b
1 changed files with 3 additions and 1 deletions
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4
drivers/s390/cio/cmf.c
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@ -876,8 +876,10 @@ static void free_cmbe(struct ccw_device *cdev)
spin_lock_irq(cdev->ccwlock);
cmb_data = cdev->private->cmb;
cdev->private->cmb = NULL;
if (cmb_data)
if (cmb_data) {
kfree(cmb_data->last_block);
kfree(cmb_data->hw_block);
}
kfree(cmb_data);
/* deactivate global measurement if this is the last channel */