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powerpc/85xx: fix null pointer dereference when init the SGMII TBI PHY

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Function dtsec_configure_serdes() needs to know where the TBI PHY registers
are in order to configure SGMII for proper SerDes operation.

During SGMII initialzation, fm_eth_init_mac() passing NULL for 'phyregs'
when it called init_dtsec(), because it was believed that phyregs was not
used.  In fact, it is used by dtsec_configure_serdes() to configure the TBI
PHY registers.

We also need to define the PHY registers in struct fm_mdio.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Timur Tabi 2011-10-04 16:44:43 -05:00 committed by Kumar Gala
parent 712cf7ab0b
commit 3038171628
3 changed files with 11 additions and 3 deletions
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9
arch/powerpc/include/asm/fsl_fman.h
View File

@ -405,7 +405,14 @@ typedef struct fm_dtesc {
} fm_dtsec_t;
typedef struct fm_mdio {
u8 res[4*1024];
u8 res0[0x120];
u32 miimcfg; /* MII management configuration reg */
u32 miimcom; /* MII management command reg */
u32 miimadd; /* MII management address reg */
u32 miimcon; /* MII management control reg */
u32 miimstat; /* MII management status reg */
u32 miimind; /* MII management indication reg */
u8 res1[0x1000 - 0x138];
} fm_mdio_t;
typedef struct fm_10gec {

2
drivers/net/fm/dtsec.c
View File

@ -171,7 +171,7 @@ void init_dtsec(struct fsl_enet_mac *mac, void *base,
void *phyregs, int max_rx_len)
{
mac->base = base;
mac->phyregs = NULL;
mac->phyregs = phyregs;
mac->max_rx_len = max_rx_len;
mac->init_mac = dtsec_init_mac;
mac->enable_mac = dtsec_enable_mac;

3
drivers/net/fm/eth.c
View File

@ -537,6 +537,7 @@ static int fm_eth_init_mac(struct fm_eth *fm_eth, struct ccsr_fman *reg)
/* Get the mac registers base address */
if (fm_eth->type == FM_ETH_1G_E) {
base = &reg->mac_1g[num].fm_dtesc;
phyregs = &reg->mac_1g[num].fm_mdio.miimcfg;
} else {
base = &reg->mac_10g[num].fm_10gec;
phyregs = &reg->mac_10g[num].fm_10gec_mdio;
@ -552,7 +553,7 @@ static int fm_eth_init_mac(struct fm_eth *fm_eth, struct ccsr_fman *reg)
fm_eth->mac = mac;
if (fm_eth->type == FM_ETH_1G_E)
init_dtsec(mac, base, NULL, MAX_RXBUF_LEN);
init_dtsec(mac, base, phyregs, MAX_RXBUF_LEN);
else
init_tgec(mac, base, phyregs, MAX_RXBUF_LEN);