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ar71xx: ag71xx: Prevent kernel oops for board def 

The driver is written in such a way that with a board defintion that
connects a fixed phy, mdio, and switch in a certain way, a kernel oops could
result because of lack of previously probed mdio bus.

This commit allows for easier debugging in this case by casting the
correct blame with serial console messages.

Signed-off-by: Daniel F. Dickinson <cshored@thecshore.com>
This commit is contained in:
Daniel F. Dickinson 2018-07-26 02:57:37 -04:00 committed by John Crispin
parent 0b9f4e8808
commit 7a3e133751
1 changed files with 15 additions and 1 deletions
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16
target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_phy.c
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@ -76,10 +76,24 @@ void ag71xx_phy_stop(struct ag71xx *ag)
static int ag71xx_phy_connect_fixed(struct ag71xx *ag)
{
struct device *dev = &ag->pdev->dev;
struct platform_device *pdev = ag->pdev;
struct device *dev = NULL;
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
int ret = 0;
if (!pdev)
return -ENODEV;
dev = &pdev->dev;
if (!dev)
return -ENODEV;
if (!ag->phy_dev) {
pr_err("Missing PHY for %s", dev_name(dev));
return -ENODEV;
}
/* use fixed settings */
switch (pdata->speed) {
case SPEED_10: