From 518e59833ad33561788f56b7ea624c6094b8b94f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Stelmach?= <l.stelmach@samsung.com>
Date: Tue, 7 Jan 2014 15:00:22 +0100
Subject: [PATCH] gpt-auto-generator: skip nonexistent devices

The devices we work with have eMMC chips for storage. The chips
provide four "hardware" partitions.  The first is /dev/mmcblk0, it
takes almost whole space and holds a GPT with several real partitions
(/dev/mmcblk0p?). Then there are three block devices (mmcblk0boot0,
mmcblk0boot1, rpmb) that are part of the same hardware as mmcblk0 that
are presented by the kernel as children of the latter. That relationship
makes gpt-auto-generator try to peek them but since they are not GPT
partitions blkid_do_safeprobe() returns -2 making verify_gpt_parition()
function return -ENODEV.

(cherry picked from commit 843f737ade9c73609a2280dd3dd16e18222a5dcb)
---
 src/gpt-auto-generator/gpt-auto-generator.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gpt-auto-generator/gpt-auto-generator.c b/src/gpt-auto-generator/gpt-auto-generator.c
index 25440e7..0e8e959 100644
--- a/src/gpt-auto-generator/gpt-auto-generator.c
+++ b/src/gpt-auto-generator/gpt-auto-generator.c
@@ -298,6 +298,9 @@ static int enumerate_partitions(struct udev *udev, dev_t dev) {
 
                 r = verify_gpt_partition(node, &type_id, &nr, &fstype);
                 if (r < 0) {
+                        /* skip child devices which are not detected properly */
+                        if (r == -ENODEV)
+                                continue;
                         log_error("Failed to verify GPT partition %s: %s",
                                   node, strerror(-r));
                         return r;