s390/pci: do not read data after failed load

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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>

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Sebastian Ott 2013-04-16 14:17:15 +02:00 • committed by Martin Schwidefsky

parent f0bacb7fc4

commit b170bad40d

3 changed files with 11 additions and 5 deletions

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4

arch/s390/include/asm/pci_io.h

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8

arch/s390/pci/pci.c

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4

arch/s390/pci/pci_insn.c

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