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Subject[PATCH 4.3 088/125] s390/pci: reshuffle struct used to write debug data
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4.3-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sebastian Ott <sebott@linux.vnet.ibm.com>

commit 7cc8944e13c73374b6f33b39ca24c0891c87b077 upstream.

zpci_err_insn writes stale stack content to the debugfs.

Ensure that the struct in zpci_err_insn is ordered in a way that
we don't have uninitialized holes in it. In addition to that
add the packed attribute.

Fixes: 3d8258e (s390/pci: move debug messages to debugfs)
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/s390/pci/pci_insn.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

--- a/arch/s390/pci/pci_insn.c
+++ b/arch/s390/pci/pci_insn.c
@@ -16,11 +16,11 @@
static inline void zpci_err_insn(u8 cc, u8 status, u64 req, u64 offset)
{
struct {
- u8 cc;
- u8 status;
u64 req;
u64 offset;
- } data = {cc, status, req, offset};
+ u8 cc;
+ u8 status;
+ } __packed data = {req, offset, cc, status};

zpci_err_hex(&data, sizeof(data));
}



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