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rtl8139: correctly check the opmode 

According to the spec, only when opmode is "Config. Register Write
Enable" could driver write to CONFIG0,1,3,4 and bits 13,12,8 of BMCR.

Currently, we allow modifying to those registers also when 8139 is in
"Auto-load" mode and "93C46 (93C56) Programming" mode. This patch
fixes this.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2012-03-05 11:08:59 +08:00 committed by Michael S. Tsirkin
parent 7fc8d918b9
commit eb46c5eda7
1 changed files with 5 additions and 3 deletions
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8
hw/rtl8139.c
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@ -332,8 +332,10 @@ enum CSCRBits {
};
enum Cfg9346Bits {
Cfg9346_Lock = 0x00,
Cfg9346_Unlock = 0xC0,
Cfg9346_Normal = 0x00,
Cfg9346_Autoload = 0x40,
Cfg9346_Programming = 0x80,
Cfg9346_ConfigWrite = 0xC0,
};
typedef enum {
@ -1451,7 +1453,7 @@ static uint32_t rtl8139_IntrMitigate_read(RTL8139State *s)
static int rtl8139_config_writable(RTL8139State *s)
{
if (s->Cfg9346 & Cfg9346_Unlock)
if ((s->Cfg9346 & Chip9346_op_mask) == Cfg9346_ConfigWrite)
{
return 1;
}