Revert "ioctl: add nvme_get_features_timestamp2()"

This reverts commit 5547b93.

The result field is undefined for many commands and thus can have random values.
Thus we can't blindly evaluate these for all commands.

Signed-off-by: Daniel Wagner <[email protected]>

Author: dwsuse

src/libnvme.map

@@ -14,7 +14,6 @@ LIBNVME_1.9 {
 		nvme_set_features_host_behavior2;
 		nvme_set_features_host_id2;
 		nvme_set_features_iocs_profile2;
-		nvme_get_features_timestamp2;
 };
 
 LIBNVME_1_8 {

src/nvme/ioctl.c

@@ -1042,18 +1042,6 @@ int nvme_get_features_host_mem_buf2(int fd, enum nvme_get_features_sel sel,
 
 int nvme_get_features_timestamp(int fd, enum nvme_get_features_sel sel,
 				struct nvme_timestamp *ts)
-{
-	__u32 result = 0;
-	int err;
-
-	err = nvme_get_features_timestamp2(fd, sel, ts, &result);
-	if (err && result)
-		err = result;
-	return err;
-}
-
-int nvme_get_features_timestamp2(int fd, enum nvme_get_features_sel sel,
-				 struct nvme_timestamp *ts, __u32 *result)
 {
 	struct nvme_get_features_args args = {
 		.args_size = sizeof(args),
@@ -1066,7 +1054,7 @@ int nvme_get_features_timestamp2(int fd, enum nvme_get_features_sel sel,
 		.data_len = sizeof(*ts),
 		.data = ts,
 		.timeout = NVME_DEFAULT_IOCTL_TIMEOUT,
-		.result = result,
+		.result = NULL,
 	};
 
 	return nvme_get_features(&args);

src/nvme/ioctl.h

@@ -3318,20 +3318,6 @@ int nvme_get_features_host_mem_buf2(int fd, enum nvme_get_features_sel sel,
 int nvme_get_features_timestamp(int fd, enum nvme_get_features_sel sel,
 				struct nvme_timestamp *ts);
 
-/**
- * nvme_get_features_timestamp2() - Get timestamp feature
- * @fd:		File descriptor of nvme device
- * @sel:	Select which type of attribute to return, see
- *		&enum nvme_get_features_sel
- * @ts:		Current timestamp
- * @result:	The command completion result from CQE dword0
- *
- * Return: 0 if the ioctl was successful, -1 with errno set to EPROTO when
- * a non-zero state is returned in @result, or -1 with errno set otherwise.
- */
-int nvme_get_features_timestamp2(int fd, enum nvme_get_features_sel sel,
-				 struct nvme_timestamp *ts, __u32 *result);
-
 /**
  * nvme_get_features_kato() - Get keep alive timeout feature
  * @fd:		File descriptor of nvme device