SVM-SEV: convert the rest of fget() uses to fdget() in there

Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Author: Al Viro

arch/x86/kvm/svm/sev.c

@@ -1767,18 +1767,20 @@ int sev_vm_move_enc_context_from(struct kvm *kvm, unsigned int source_fd)
 {
 	struct kvm_sev_info *dst_sev = &to_kvm_svm(kvm)->sev_info;
 	struct kvm_sev_info *src_sev, *cg_cleanup_sev;
-	struct file *source_kvm_file;
+	struct fd f = fdget(source_fd);
 	struct kvm *source_kvm;
 	bool charged = false;
 	int ret;
 
-	source_kvm_file = fget(source_fd);
-	if (!file_is_kvm(source_kvm_file)) {
+	if (!f.file)
+		return -EBADF;
+
+	if (!file_is_kvm(f.file)) {
 		ret = -EBADF;
 		goto out_fput;
 	}
 
-	source_kvm = source_kvm_file->private_data;
+	source_kvm = f.file->private_data;
 	ret = sev_lock_two_vms(kvm, source_kvm);
 	if (ret)
 		goto out_fput;
@@ -1828,8 +1830,7 @@ int sev_vm_move_enc_context_from(struct kvm *kvm, unsigned int source_fd)
 out_unlock:
 	sev_unlock_two_vms(kvm, source_kvm);
 out_fput:
-	if (source_kvm_file)
-		fput(source_kvm_file);
+	fdput(f);
 	return ret;
 }
 
@@ -2046,18 +2047,20 @@ int sev_mem_enc_unregister_region(struct kvm *kvm,
 
 int sev_vm_copy_enc_context_from(struct kvm *kvm, unsigned int source_fd)
 {
-	struct file *source_kvm_file;
+	struct fd f = fdget(source_fd);
 	struct kvm *source_kvm;
 	struct kvm_sev_info *source_sev, *mirror_sev;
 	int ret;
 
-	source_kvm_file = fget(source_fd);
-	if (!file_is_kvm(source_kvm_file)) {
+	if (!f.file)
+		return -EBADF;
+
+	if (!file_is_kvm(f.file)) {
 		ret = -EBADF;
 		goto e_source_fput;
 	}
 
-	source_kvm = source_kvm_file->private_data;
+	source_kvm = f.file->private_data;
 	ret = sev_lock_two_vms(kvm, source_kvm);
 	if (ret)
 		goto e_source_fput;
@@ -2103,8 +2106,7 @@ int sev_vm_copy_enc_context_from(struct kvm *kvm, unsigned int source_fd)
 e_unlock:
 	sev_unlock_two_vms(kvm, source_kvm);
 e_source_fput:
-	if (source_kvm_file)
-		fput(source_kvm_file);
+	fdput(f);
 	return ret;
 }