diff options
Diffstat (limited to 'drivers/net/phy/miiphybb.c')
| -rw-r--r-- | drivers/net/phy/miiphybb.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/phy/miiphybb.c b/drivers/net/phy/miiphybb.c index e3c163a..b77c917 100644 --- a/drivers/net/phy/miiphybb.c +++ b/drivers/net/phy/miiphybb.c @@ -127,6 +127,11 @@ int bb_miiphy_read (char *devname, unsigned char addr, volatile ioport_t *iop = ioport_addr ((immap_t *) CONFIG_SYS_IMMR, MDIO_PORT); #endif + if (value == NULL) { + puts("NULL value pointer\n"); + return (-1); + } + miiphy_pre (1, addr, reg); /* tri-state our MDIO I/O pin so we can read */ @@ -145,6 +150,8 @@ int bb_miiphy_read (char *devname, unsigned char addr, MDC (1); MIIDELAY; } + /* There is no PHY, set value to 0xFFFF and return */ + *value = 0xFFFF; return (-1); } |