Re: [Qemu-devel] [PATCH 1/2] lan9118: fix emulation of MAC address loaded bit in E2P_CMD register

[Jason Wang <jasowang@redhat.com>]

On 12/05/2015 02:58 AM, Andrew Baumann wrote:
> There appears to have been a longstanding typo in the implementation
> of the "MAC address loaded" bit in the E2P_CMD (EEPROM command)
> register. The code was using 0x10, but the controller spec says it
> should be bit 8 (0x100).
>
> Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
> ---
> This may have slipped through, because the Linux driver doesn't
> check that bit; it simply reads the MAC address and assumes it is
> valid.

Applied in my -net for 2.5. Thanks

>
>  hw/net/lan9118.c | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/hw/net/lan9118.c b/hw/net/lan9118.c
> index 4f0e840..133fd3d 100644
> --- a/hw/net/lan9118.c
> +++ b/hw/net/lan9118.c
> @@ -56,6 +56,8 @@ do { fprintf(stderr, "lan9118: error: " fmt , ## __VA_ARGS__);} while (0)
>  #define CSR_E2P_CMD     0xb0
>  #define CSR_E2P_DATA    0xb4
>  
> +#define E2P_CMD_MAC_ADDR_LOADED 0x100
> +
>  /* IRQ_CFG */
>  #define IRQ_INT         0x00001000
>  #define IRQ_EN          0x00000100
> @@ -352,14 +354,14 @@ static void lan9118_reload_eeprom(lan9118_state *s)
>  {
>      int i;
>      if (s->eeprom[0] != 0xa5) {
> -        s->e2p_cmd &= ~0x10;
> +        s->e2p_cmd &= ~E2P_CMD_MAC_ADDR_LOADED;
>          DPRINTF("MACADDR load failed\n");
>          return;
>      }
>      for (i = 0; i < 6; i++) {
>          s->conf.macaddr.a[i] = s->eeprom[i + 1];
>      }
> -    s->e2p_cmd |= 0x10;
> +    s->e2p_cmd |= E2P_CMD_MAC_ADDR_LOADED;
>      DPRINTF("MACADDR loaded from eeprom\n");
>      lan9118_mac_changed(s);
>  }
> @@ -937,7 +939,7 @@ static uint32_t do_mac_read(lan9118_state *s, int reg)
>  
>  static void lan9118_eeprom_cmd(lan9118_state *s, int cmd, int addr)
>  {
> -    s->e2p_cmd = (s->e2p_cmd & 0x10) | (cmd << 28) | addr;
> +    s->e2p_cmd = (s->e2p_cmd & E2P_CMD_MAC_ADDR_LOADED) | (cmd << 28) | addr;
>      switch (cmd) {
>      case 0:
>          s->e2p_data = s->eeprom[addr];