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-rw-r--r--hw/sd/sd.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 346d86f69c..7380f063f7 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -494,6 +494,11 @@ SDState *sd_init(BlockDriverState *bs, bool is_spi)
{
SDState *sd;
+ if (bdrv_is_read_only(bs)) {
+ fprintf(stderr, "sd_init: Cannot use read-only drive\n");
+ return NULL;
+ }
+
sd = (SDState *) g_malloc0(sizeof(SDState));
sd->buf = qemu_blockalign(bs, 512);
sd->spi = is_spi;