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ar71xx: ag71xx: check PHY IDs before accessing the switch registers 

SVN-Revision: 29541
lede-17.01
Gabor Juhos 2011-12-15 13:25:23 +00:00
parent 0655552860
commit b7d7481b07
1 changed files with 8 additions and 9 deletions
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17
target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ar7240.c
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@ -852,6 +852,14 @@ static struct ar7240sw *ar7240_probe(struct ag71xx *ag)
u8 ver;
int i;
phy_id1 = ar7240sw_phy_read(mii, 0, MII_PHYSID1);
phy_id2 = ar7240sw_phy_read(mii, 0, MII_PHYSID2);
if (phy_id1 != AR7240_PHY_ID1 || phy_id2 != AR7240_PHY_ID2) {
pr_err("%s: unknown phy id '%04x:%04x'\n",
ag->dev->name, phy_id1, phy_id2);
return NULL;
}
as = kzalloc(sizeof(*as), GFP_KERNEL);
if (!as)
return NULL;
@ -859,7 +867,6 @@ static struct ar7240sw *ar7240_probe(struct ag71xx *ag)
as->mii_bus = mii;
ctrl = ar7240sw_reg_read(mii, AR7240_REG_MASK_CTRL);
ver = (ctrl >> AR7240_MASK_CTRL_VERSION_S) & AR7240_MASK_CTRL_VERSION_M;
if (ver != 1) {
pr_err("%s: unsupported chip, ctrl=%08x\n",
@ -867,14 +874,6 @@ static struct ar7240sw *ar7240_probe(struct ag71xx *ag)
return NULL;
}
phy_id1 = ar7240sw_phy_read(mii, 0, MII_PHYSID1);
phy_id2 = ar7240sw_phy_read(mii, 0, MII_PHYSID2);
if (phy_id1 != AR7240_PHY_ID1 || phy_id2 != AR7240_PHY_ID2) {
pr_err("%s: unknown phy id '%04x:%04x'\n",
ag->dev->name, phy_id1, phy_id2);
return NULL;
}
swdev = &as->swdev;
swdev->name = "AR7240 built-in switch";
swdev->ports = AR7240_NUM_PORTS - 1;