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s390/pci: add exception table to load/store instructions

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Don't let pci_load and friends crash the kernel when called with
e.g. an invalid offset. Return -ENXIO instead.

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>
This commit is contained in:
Sebastian Ott
2013-04-16 14:16:14 +02:00
committed by Martin Schwidefsky
parent b2a9e87d2c
commit f0bacb7fc4
2 changed files with 30 additions and 24 deletions
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2
arch/s390/include/asm/pci_io.h
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@@ -89,7 +89,7 @@ static inline int zpci_write_single(u64 req, const u64 *data, u64 offset, u8 len
static inline int zpci_read_single(u64 req, u64 *dst, u64 offset, u8 len)
{
u64 data;
u8 cc;
int cc;
cc = s390pci_load(&data, req, offset);
switch (len) {