arm64: fix return code check when changing emulation handler
authorWill Deacon <will.deacon@arm.com>
Tue, 25 Nov 2014 10:05:35 +0000 (10:05 +0000)
committerWill Deacon <will.deacon@arm.com>
Tue, 25 Nov 2014 10:05:35 +0000 (10:05 +0000)
commit909633957d85561dab7655d69a9d17dd16231d92
tree3acf8d21e92305a5ac51350e23706ff59dd08f11
parent7f73f7aef824b8bc27046edaf6b73bca4b0e7669
arm64: fix return code check when changing emulation handler

update_insn_emulation_mode() returns 0 on success, so we should be
treating any non-zero values as failure, rather than the other way
around. Otherwise, writes to the sysctl file controlling the emulation
are ignored and immediately rolled back.

Reported-by: Gene Hackmann <ghackmann@google.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm64/kernel/armv8_deprecated.c