From a9d099daa69acaf31e61f6543829a9fdffed2f04 Mon Sep 17 00:00:00 2001
From: Toomas Soome <tsoome@me.com>
Date: Fri, 13 Apr 2018 19:20:49 +0300
Subject: [PATCH] usbgen: zpool destroy can fail with pool busy

---
 usr/src/cmd/install-tools/usbgen | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/usr/src/cmd/install-tools/usbgen b/usr/src/cmd/install-tools/usbgen
index 1ffd3119..0459b2d5 100755
--- a/usr/src/cmd/install-tools/usbgen
+++ b/usr/src/cmd/install-tools/usbgen
@@ -338,7 +338,7 @@ pdev="${devs/p0/}"
 # create GPT partitioning with system, boot and root
 #
 zpool create -B -o bootsize=34M usbgen-$$ $pdev
-zpool destroy usbgen-$$
+until zpool destroy usbgen-$$; do sleep 1; done
 
 prtvtoc "${rs2devs}" | nawk '
 /^[^\*]/ { r = $1; for(n = 1; n <= NF; n++) vtoc[r,n] = $n }