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From e2353e7c13808e47efb844f8fb10b7aa2142e619 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Fri, 13 Mar 2015 21:10:13 -0500
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Subject: [PATCH] gpt-auto-generator: allow type check to fail
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add_mount() is OK with unknow file type, but we have to initalize
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the variable to NULL not to pass garbage on error.
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(cherry picked from commit a0b1209c4a59754f428894e0485413542da50014)
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---
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 src/gpt-auto-generator/gpt-auto-generator.c | 13 +++++--------
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 1 file changed, 5 insertions(+), 8 deletions(-)
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diff --git a/src/gpt-auto-generator/gpt-auto-generator.c b/src/gpt-auto-generator/gpt-auto-generator.c
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index cceeeb8..00a2141 100644
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--- a/src/gpt-auto-generator/gpt-auto-generator.c
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+++ b/src/gpt-auto-generator/gpt-auto-generator.c
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@@ -291,7 +291,7 @@ static int probe_and_add_mount(
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                 const char *post) {
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         _cleanup_blkid_free_probe_ blkid_probe b = NULL;
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-        const char *fstype;
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+        const char *fstype = NULL;
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         int r;
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         assert(id);
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@@ -324,14 +324,11 @@ static int probe_and_add_mount(
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         r = blkid_do_safeprobe(b);
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         if (r == -2 || r == 1) /* no result or uncertain */
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                 return 0;
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-        else if (r != 0) {
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-                if (errno == 0)
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-                        errno = EIO;
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-                log_error_errno(errno, "Failed to probe %s: %m", what);
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-                return -errno;
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-        }
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+        else if (r != 0)
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+                return log_error_errno(errno ?: EIO, "Failed to probe %s: %m", what);
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-        blkid_probe_lookup_value(b, "TYPE", &fstype, NULL);
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+        /* add_mount is OK with fstype being NULL. */
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+        (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL);
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         return add_mount(
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                         id,