On Mon, Jun 18, 2012 at 4:47 PM, Johannes Stezenbach <js@xxxxxxxxx> wrote:
Check if the PHY is really accessible (e.g. the
PHY address is correct) during probe.
Signed-off-by: Johannes Stezenbach <js@xxxxxxxxx>
---
drivers/net/miidev.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/net/miidev.c b/drivers/net/miidev.c
index 272234e..3545889 100644
--- a/drivers/net/miidev.c
+++ b/drivers/net/miidev.c
@@ -225,6 +225,14 @@ static struct file_operations miidev_ops = {
static int miidev_probe(struct device_d *dev)
{
struct mii_device *mdev = dev->priv;
+ int val;
+
+ val = mii_read(mdev, mdev->address, MII_PHYSID1);
+ if (val < 0 || val == 0xffff)
+ goto err_out;
+ val = mii_read(mdev, mdev->address, MII_PHYSID2);
+ if (val < 0 || val == 0xffff)
+ goto err_out;
Suppose this has no influence on drivers/net/fec_imx.c:fec_set_hwaddr() returning -1?
Otherwise I believe this is fine.
Cheers
Roberto
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