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| 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/intercept.c | |
| parent | 59a1fa2d80c0d351755cb29273b2b256dc4b3a11 (diff) | |
| download | linux-dc5008b9bf6adb0c0a5afba6fb376a85451b2697.tar.bz2 | |
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/intercept.c')
| -rw-r--r-- | arch/s390/kvm/intercept.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c index f26ff1e31bdb..9b2204759445 100644 --- a/arch/s390/kvm/intercept.c +++ b/arch/s390/kvm/intercept.c @@ -45,7 +45,7 @@ static int handle_lctlg(struct kvm_vcpu *vcpu) do { rc = get_guest_u64(vcpu, useraddr, &vcpu->arch.sie_block->gcr[reg]); - if (rc == -EFAULT) { + if (rc) { kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); break; } @@ -79,7 +79,7 @@ static int handle_lctl(struct kvm_vcpu *vcpu) reg = reg1; do { rc = get_guest_u32(vcpu, useraddr, &val); - if (rc == -EFAULT) { + if (rc) { kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); break; } |