[PATCH] bootz: give a proper error on open() failure

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Currently when running bootz on a nonexistent file, barebox just got stuck. Fix
this.

Signed-off-by: Baruch Siach <baruch@xxxxxxxxxx>
---
 arch/arm/lib/armlinux.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/arm/lib/armlinux.c b/arch/arm/lib/armlinux.c
index 89d989a..17ae057 100644
--- a/arch/arm/lib/armlinux.c
+++ b/arch/arm/lib/armlinux.c
@@ -34,6 +34,7 @@
 #include <xfuncs.h>
 #include <malloc.h>
 #include <fcntl.h>
+#include <errno.h>
 
 #include <asm/byteorder.h>
 #include <asm/global_data.h>
@@ -276,6 +277,10 @@ static int do_bootz(struct command *cmdtp, int argc, char *argv[])
 	}
 
 	fd = open(argv[1], O_RDONLY);
+	if (fd < 0) {
+		perror("open");
+		return 1;
+	}
 
 	ret = read(fd, &header, sizeof(header));
 	if (ret < sizeof(header)) {
-- 
1.7.1


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