diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2013-03-05 13:14:43 +0100 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2013-03-07 16:21:21 -0300 |
| commit | dc5008b9bf6adb0c0a5afba6fb376a85451b2697 (patch) | |
| tree | b52050bd00f8fc5e8897f10497a3bbf051cb0155 /arch/s390/kvm/priv.c | |
| parent | 59a1fa2d80c0d351755cb29273b2b256dc4b3a11 (diff) | |
s390/kvm: remove explicit -EFAULT return code checking on guest access
Let's change to the paradigm that every return code from guest memory
access functions that is not zero translates to -EFAULT and do not
explictly compare.
Explictly comparing the return value with -EFAULT has already shown to
be a bit fragile. In addition this is closer to the handling of
copy_to/from_user functions, which imho is in general a good idea.
Also shorten the return code handling in interrupt.c a bit.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/s390/kvm/priv.c')
| -rw-r--r-- | arch/s390/kvm/priv.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index 75ad91e38e8a..34b42dc285ee 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -108,7 +108,7 @@ static int handle_store_cpu_address(struct kvm_vcpu *vcpu) } rc = put_guest_u16(vcpu, useraddr, vcpu->vcpu_id); - if (rc == -EFAULT) { + if (rc) { kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); goto out; } @@ -230,7 +230,7 @@ static int handle_stfl(struct kvm_vcpu *vcpu) rc = copy_to_guest(vcpu, offsetof(struct _lowcore, stfl_fac_list), &facility_list, sizeof(facility_list)); - if (rc == -EFAULT) + if (rc) kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); else { VCPU_EVENT(vcpu, 5, "store facility list value %x", @@ -348,7 +348,7 @@ static int handle_stidp(struct kvm_vcpu *vcpu) } rc = put_guest_u64(vcpu, operand2, vcpu->arch.stidp_data); - if (rc == -EFAULT) { + if (rc) { kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); goto out; } |