From a3efecb847dd89886f7cd3f71661b2d79ec68072 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juha=20Riihim=C3=A4ki?= <juha.riihimaki@nokia.com>
Date: Thu, 20 Oct 2011 14:53:35 +0200
Subject: [PATCH] hw/onenand: reject read-only drives
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Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
---
 hw/onenand.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/onenand.c b/hw/onenand.c
index 6f68f70698..7898da9321 100644
--- a/hw/onenand.c
+++ b/hw/onenand.c
@@ -26,6 +26,7 @@
 #include "memory.h"
 #include "exec-memory.h"
 #include "sysbus.h"
+#include "qemu-error.h"
 
 /* 11 for 2kB-page OneNAND ("2nd generation") and 10 for 1kB-page chips */
 #define PAGE_SHIFT	11
@@ -772,6 +773,10 @@ static int onenand_initfn(SysBusDevice *dev)
         s->image = memset(g_malloc(size + (size >> 5)),
                           0xff, size + (size >> 5));
     } else {
+        if (bdrv_is_read_only(s->bdrv)) {
+            error_report("Can't use a read-only drive");
+            return -1;
+        }
         s->bdrv_cur = s->bdrv;
     }
     s->otp = memset(g_malloc((64 + 2) << PAGE_SHIFT),