Revert "nvme: add flush command chardev handle error message"

This reverts commit 946029c.

Causes regression in nightly CI runs. The problem couldn't be figured out
thus revert it.

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

Author: igaw

nvme.c

@@ -7465,23 +7465,6 @@ static int copy_cmd(int argc, char **argv, struct command *cmd, struct plugin *p
 	return err;
 }
 
-static void io_cmd_show_error(struct nvme_dev *dev, int err, const char *cmd)
-{
-	if (err > 0) {
-		nvme_show_status(err);
-		return;
-	}
-
-	nvme_show_init();
-
-	nvme_show_error("%s: %s", cmd, nvme_strerror(errno));
-
-	if (is_chardev(dev))
-		nvme_show_result("char device provided but blkdev is needed, e.g. /dev/nvme0n1");
-
-	nvme_show_finish();
-}
-
 static int flush_cmd(int argc, char **argv, struct command *cmd, struct plugin *plugin)
 {
 	const char *desc = "Commit data and metadata associated with\n"
@@ -7517,8 +7500,10 @@ static int flush_cmd(int argc, char **argv, struct command *cmd, struct plugin *
 	}
 
 	err = nvme_flush(dev_fd(dev), cfg.namespace_id);
-	if (err)
-		io_cmd_show_error(dev, err, "flush");
+	if (err < 0)
+		nvme_show_error("flush: %s", nvme_strerror(errno));
+	else if (err != 0)
+		nvme_show_status(err);
 	else
 		printf("NVMe Flush: success\n");