s390/pci_dma: unify label of invalid translation table entries

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Newly allocated translation table entries are flagged as invalid
and protected. If an existing translation table entry is invalidated,
the protection flag is left unchanged.

If a page (with invalid and protection flag set) is accessed it's
undefined which type of exception we'll receive.

Make sure to always set the invalid flag only.

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>

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Sebastian Ott 2015-10-26 11:15:28 +01:00 • committed by Martin Schwidefsky

parent 86b68c3873

commit 4d5a6b7295

1 changed files with 3 additions and 4 deletions

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arch/s390/pci/pci_dma.c

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