When the flash device is performing a chip erase, all commands are
ignored. When it is performing a sector erase, only the erase suspend
command is valid, which is currently not supported.

In particular, the reset command should not cause the device to reset to
read array mode while programming is on going.
---
 hw/block/pflash_cfi02.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/block/pflash_cfi02.c b/hw/block/pflash_cfi02.c
index 32aba9a771..fa6929b9b6 100644
--- a/hw/block/pflash_cfi02.c
+++ b/hw/block/pflash_cfi02.c
@@ -325,7 +325,8 @@ static void pflash_write(void *opaque, hwaddr offset, uint64_t value,
                     pfl->bank_width * 2, value);
         }
 
-        if (cmd == 0xF0) {
+        /* Reset does nothing during chip erase and sector erase. */
+        if (cmd == 0xF0 && pfl->cmd != 0x10 && pfl->cmd != 0x30) {
 #if 0
             DPRINTF("%s: flash reset asked (%02x %02x)\n",
                     __func__, pfl->cmd, cmd);
-- 
2.20.1 (Apple Git-117)