| Message ID | 1544716952-13482-1-git-send-email-rogerq@ti.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2] usb: ehci-omap: Fix deferred probe for phy handling | expand |
* Roger Quadros <rogerq@ti.com> [181213 16:03]: > PHY model is being used on omap5 platforms even if port mode > is not OMAP_EHCI_PORT_MODE_PHY. So don't guess if PHY is required > or not based on PHY mode. > > If PHY is provided in device tree, it must be required. So, if > devm_usb_get_phy_by_phandle() gives us an error code other > than -ENODEV (no PHY) then error out. > > This fixes USB Ethernet on omap5-uevm if PHY happens to > probe after EHCI thus causing a -EPROBE_DEFER. OK works for me, let's go with this one instead: Acked-by: Tony Lindgren <tony@atomide.com>
On Thu, 13 Dec 2018, Roger Quadros wrote: > PHY model is being used on omap5 platforms even if port mode > is not OMAP_EHCI_PORT_MODE_PHY. So don't guess if PHY is required > or not based on PHY mode. > > If PHY is provided in device tree, it must be required. So, if > devm_usb_get_phy_by_phandle() gives us an error code other > than -ENODEV (no PHY) then error out. > > This fixes USB Ethernet on omap5-uevm if PHY happens to > probe after EHCI thus causing a -EPROBE_DEFER. > > Cc: Alan Stern <stern@rowland.harvard.edu> > Cc: Johan Hovold <johan@kernel.org> > Cc: Ladislav Michl <ladis@linux-mips.org> > Cc: Peter Ujfalusi <peter.ujfalusi@ti.com> > Cc: Tony Lindgren <tony@atomide.com> > Reported-by: Peter Ujfalusi <peter.ujfalusi@ti.com> > Signed-off-by: Roger Quadros <rogerq@ti.com> > --- > drivers/usb/host/ehci-omap.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c > index 7e4c1334..0eacbf4 100644 > --- a/drivers/usb/host/ehci-omap.c > +++ b/drivers/usb/host/ehci-omap.c > @@ -159,9 +159,11 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev) > /* get the PHY device */ > phy = devm_usb_get_phy_by_phandle(dev, "phys", i); > if (IS_ERR(phy)) { > - /* Don't bail out if PHY is not absolutely necessary */ > - if (pdata->port_mode[i] != OMAP_EHCI_PORT_MODE_PHY) > + ret = PTR_ERR(phy); > + if (ret == -ENODEV) { /* no PHY */ > + phy = NULL; > continue; > + } > > ret = PTR_ERR(phy); Please remove this line. Alan Stern > if (ret != -EPROBE_DEFER) >
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c index 7e4c1334..0eacbf4 100644 --- a/drivers/usb/host/ehci-omap.c +++ b/drivers/usb/host/ehci-omap.c @@ -159,9 +159,11 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev) /* get the PHY device */ phy = devm_usb_get_phy_by_phandle(dev, "phys", i); if (IS_ERR(phy)) { - /* Don't bail out if PHY is not absolutely necessary */ - if (pdata->port_mode[i] != OMAP_EHCI_PORT_MODE_PHY) + ret = PTR_ERR(phy); + if (ret == -ENODEV) { /* no PHY */ + phy = NULL; continue; + } ret = PTR_ERR(phy); if (ret != -EPROBE_DEFER)
PHY model is being used on omap5 platforms even if port mode is not OMAP_EHCI_PORT_MODE_PHY. So don't guess if PHY is required or not based on PHY mode. If PHY is provided in device tree, it must be required. So, if devm_usb_get_phy_by_phandle() gives us an error code other than -ENODEV (no PHY) then error out. This fixes USB Ethernet on omap5-uevm if PHY happens to probe after EHCI thus causing a -EPROBE_DEFER. Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Johan Hovold <johan@kernel.org> Cc: Ladislav Michl <ladis@linux-mips.org> Cc: Peter Ujfalusi <peter.ujfalusi@ti.com> Cc: Tony Lindgren <tony@atomide.com> Reported-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Roger Quadros <rogerq@ti.com> --- drivers/usb/host/ehci-omap.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)