Hi,
On 01/08/2014 12:28 PM, Roger Quadros wrote:
On 01/08/2014 03:35 PM, Arnd Bergmann wrote:
On Wednesday 08 January 2014 15:29:18 Kishon Vijay Abraham I wrote:
+ hpriv->phy = devm_phy_get(dev, "sata-phy");
+ if (IS_ERR(hpriv->phy)) {
+ dev_dbg(dev, "can't get sata-phy\n");
+ /* return only if -EPROBE_DEFER */
+ if (PTR_ERR(hpriv->phy) == -EPROBE_DEFER) {
+ rc = -EPROBE_DEFER;
+ goto disable_unprepare_clk;
+ }
+ }
This should probably check for all errors except "not present"
rather than checking for -EPROBE_DEFER. We want to abort the
probe function for deferred probe as well as the case where we
a PHY was listed but isn't working properly.
OK.
+ if (!IS_ERR(hpriv->phy)) {
+ phy_init(hpriv->phy);
Don't we have to check the return values of phy_init and phy_power_on? Is it
not needed because it is an optional phy?
Right. I think we should set hpriv->phy to NULL if it's not there and
then call the functions only if it's actually present but bail out on
an error.
OK. How does this look?
hpriv->phy = devm_phy_get(dev, "sata-phy");
if (IS_ERR(hpriv->phy)) {
if (PTR_ERR(hpriv->phy) == -ENODEV)
goto continue;
-ENODEV is not the right errno to check for,
if there is no phy specified in the dt then
you will get -EINVAL (no phy-names property) or
-ENODATA (phy-names property is there but name
not found).
Also you don't want to log an error on
PROBE_DEFERRAL.
Here is what I've for similar code I'm working on
for ehci-platform.c and ohci-platform.c :
priv->phy = devm_phy_get(&dev->dev, "phy0");
if (IS_ERR(priv->phy)) {
err = PTR_ERR(priv->phy);
if (err != -EINVAL && err != -ENODATA) {
if (err != -EPROBE_DEFER)
dev_err(&dev->dev,
"Error getting phy\n");
goto err_put_hcd;
}
priv->phy = NULL;
}
And from then on I simply use "if (priv->phy)" checks, and of course
check phy_init and phy_power_on return values.
Regards,
Hans
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