tree 40f24811118d28edda9a99b40599f59913f01615
parent f0bacb7fc4f7defb15a6575d92f8ea4342f8f09e
author Sebastian Ott <sebott@linux.vnet.ibm.com> 1366114635 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1366200458 +0200

s390/pci: do not read data after failed load

If a pci load instruction fails the content of the register where the
data is stored is possibly unchanged. Fix the inline assembly wrapper
__pcilg to not return stale data. Additionally fix the callers of this
function who access uninitialized variables.

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