[Qemu-devel] [PATCH] pcnet: Avoid warning when switching back to 16bit mode

[Helge Deller]

When Linux is shutting down, the pcnet32 driver switches the pcnet card
back to 16bit mode to "avoid problems with dumb DOS packet driver after
a warm reboot".
This triggers the following warning in the qemu pcnet32 emulation:
Bad SWSTYLE=0x04

Avoid this qemu warning by allowing the switch-back to 16bit mode.

Signed-off-by: Helge Deller <address@hidden>

diff --git a/hw/net/pcnet.c b/hw/net/pcnet.c
index d9ba04bdfc..14eb2fa1b0 100644
--- a/hw/net/pcnet.c
+++ b/hw/net/pcnet.c
@@ -1496,8 +1496,9 @@ static void pcnet_bcr_writew(PCNetState *s, uint32_t rap, 
uint32_t val)
         case 1:
             val |= 0x0100;
             break;
-        case 2:
+        case 2: /* 32bit mode */
         case 3:
+        case 4: /* 16bit mode */
             val |= 0x0300;
             break;
         default: