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Make sure that the data in the ROM with a valid signature isn't all

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0's.  At least one PC Card ASIC does this...
This commit is contained in:
Warner Losh 2009-04-18 04:45:02 +00:00
parent f2731d8565
commit 77944b3551
1 changed files with 5 additions and 1 deletions
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6
sys/dev/ed/if_ed_pccard.c
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@ -330,7 +330,7 @@ static int
ed_pccard_rom_mac(device_t dev, uint8_t *enaddr)
{
struct ed_softc *sc = device_get_softc(dev);
uint8_t romdata[32];
uint8_t romdata[32], sum;
int i;
/*
@ -371,6 +371,10 @@ ed_pccard_rom_mac(device_t dev, uint8_t *enaddr)
device_printf(dev, "ROM DATA: %32D\n", romdata, " ");
if (romdata[28] != 0x57 || romdata[30] != 0x57)
return (0);
for (i = 0, sum = 0; i < ETHER_ADDR_LEN; i++)
sum |= romdata[i * 2];
if (sum == 0)
return (0);
for (i = 0; i < ETHER_ADDR_LEN; i++)
enaddr[i] = romdata[i * 2];
return (1);