tree a04d86f83e773731272cf299d85069f4a66bc732
parent 4d5a6b72959601d6c12e7e1ef3aa4132f0a62523
author Sebastian Ott <sebott@linux.vnet.ibm.com> 1445854753 +0100
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1447056649 +0100

s390/pci_dma: handle dma table failures

We use lazy allocation for translation table entries but don't handle
allocation (and other) failures during translation table updates.

Handle these failures and undo translation table updates when it's
meaningful.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>