| Message ID | 20170710212228.GA11249@glebfm.cloud.tilaa.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index c0b6dfe..ebd604c 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1351,7 +1351,7 @@ struct kvm_s390_ucas_mapping { /* Available with KVM_CAP_X86_SMM */ #define KVM_SMI _IO(KVMIO, 0xb7) /* Available with KVM_CAP_S390_CMMA_MIGRATION */ -#define KVM_S390_GET_CMMA_BITS _IOW(KVMIO, 0xb8, struct kvm_s390_cmma_log) +#define KVM_S390_GET_CMMA_BITS _IOWR(KVMIO, 0xb8, struct kvm_s390_cmma_log) #define KVM_S390_SET_CMMA_BITS _IOW(KVMIO, 0xb9, struct kvm_s390_cmma_log) #define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)
In case of KVM_S390_GET_CMMA_BITS, the kernel does not only read struct kvm_s390_cmma_log passed from userspace (which constitutes _IOC_WRITE), it also writes back a return value (which constitutes _IOC_READ) making this an _IOWR ioctl instead of _IOW. Fixes: 4036e387 ("KVM: s390: ioctls to get and set guest storage attributes") Signed-off-by: Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> --- include/uapi/linux/kvm.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)