| Message ID | 20201125124936.5929-1-rogerq@ti.com |
|---|---|
| State | New |
| Headers | show |
| Series | usb: cdns3: Fix hardware based role switch | expand |
Hi Peter, On 25/11/2020 14:49, Roger Quadros wrote: > Hardware based role switch is broken as the driver always skips it. > Fix this by registering for SW role switch only if 'usb-role-switch' > property is present in the device tree. > > Fixes: 50642709f659 ("usb: cdns3: core: quit if it uses role switch class") > Signed-off-by: Roger Quadros <rogerq@ti.com> Can you please pick this up for -rc cycle, else otg will be broken for us in v5.10 release. Thanks. cheers, -roger > --- > drivers/usb/cdns3/core.c | 27 +++++++++++++++------------ > 1 file changed, 15 insertions(+), 12 deletions(-) > > diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c > index a0f73d4711ae..170deb3eacf0 100644 > --- a/drivers/usb/cdns3/core.c > +++ b/drivers/usb/cdns3/core.c > @@ -427,7 +427,6 @@ static irqreturn_t cdns3_wakeup_irq(int irq, void *data) > */ > static int cdns3_probe(struct platform_device *pdev) > { > - struct usb_role_switch_desc sw_desc = { }; > struct device *dev = &pdev->dev; > struct resource *res; > struct cdns3 *cdns; > @@ -529,18 +528,21 @@ static int cdns3_probe(struct platform_device *pdev) > if (ret) > goto err2; > > - sw_desc.set = cdns3_role_set; > - sw_desc.get = cdns3_role_get; > - sw_desc.allow_userspace_control = true; > - sw_desc.driver_data = cdns; > - if (device_property_read_bool(dev, "usb-role-switch")) > + if (device_property_read_bool(dev, "usb-role-switch")) { > + struct usb_role_switch_desc sw_desc = { }; > + > + sw_desc.set = cdns3_role_set; > + sw_desc.get = cdns3_role_get; > + sw_desc.allow_userspace_control = true; > + sw_desc.driver_data = cdns; > sw_desc.fwnode = dev->fwnode; > > - cdns->role_sw = usb_role_switch_register(dev, &sw_desc); > - if (IS_ERR(cdns->role_sw)) { > - ret = PTR_ERR(cdns->role_sw); > - dev_warn(dev, "Unable to register Role Switch\n"); > - goto err3; > + cdns->role_sw = usb_role_switch_register(dev, &sw_desc); > + if (IS_ERR(cdns->role_sw)) { > + ret = PTR_ERR(cdns->role_sw); > + dev_warn(dev, "Unable to register Role Switch\n"); > + goto err3; > + } > } > > if (cdns->wakeup_irq) { > @@ -582,7 +584,8 @@ static int cdns3_probe(struct platform_device *pdev) > return 0; > err4: > cdns3_drd_exit(cdns); > - usb_role_switch_unregister(cdns->role_sw); > + if (cdns->role_sw) > + usb_role_switch_unregister(cdns->role_sw); > err3: > set_phy_power_off(cdns); > err2: > -- Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
> Hi Peter, > > On 25/11/2020 14:49, Roger Quadros wrote: > > Hardware based role switch is broken as the driver always skips it. > > Fix this by registering for SW role switch only if 'usb-role-switch' > > property is present in the device tree. > > > > Fixes: 50642709f659 ("usb: cdns3: core: quit if it uses role switch > > class") > > Signed-off-by: Roger Quadros <rogerq@ti.com> > > Can you please pick this up for -rc cycle, else otg will be broken for us in v5.10 > release. > Thanks. > It is at my -fixes tree along with my two fixes[1][2]. If there is no report issue, I will send it to Greg next Monday. [1] https://patchwork.kernel.org/project/linux-usb/patch/20201126065409.7533-1-peter.chen@kernel.org/ [2] https://patchwork.kernel.org/project/linux-usb/patch/20201126065409.7533-2-peter.chen@kernel.org/ Peter
diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c index a0f73d4711ae..170deb3eacf0 100644 --- a/drivers/usb/cdns3/core.c +++ b/drivers/usb/cdns3/core.c @@ -427,7 +427,6 @@ static irqreturn_t cdns3_wakeup_irq(int irq, void *data) */ static int cdns3_probe(struct platform_device *pdev) { - struct usb_role_switch_desc sw_desc = { }; struct device *dev = &pdev->dev; struct resource *res; struct cdns3 *cdns; @@ -529,18 +528,21 @@ static int cdns3_probe(struct platform_device *pdev) if (ret) goto err2; - sw_desc.set = cdns3_role_set; - sw_desc.get = cdns3_role_get; - sw_desc.allow_userspace_control = true; - sw_desc.driver_data = cdns; - if (device_property_read_bool(dev, "usb-role-switch")) + if (device_property_read_bool(dev, "usb-role-switch")) { + struct usb_role_switch_desc sw_desc = { }; + + sw_desc.set = cdns3_role_set; + sw_desc.get = cdns3_role_get; + sw_desc.allow_userspace_control = true; + sw_desc.driver_data = cdns; sw_desc.fwnode = dev->fwnode; - cdns->role_sw = usb_role_switch_register(dev, &sw_desc); - if (IS_ERR(cdns->role_sw)) { - ret = PTR_ERR(cdns->role_sw); - dev_warn(dev, "Unable to register Role Switch\n"); - goto err3; + cdns->role_sw = usb_role_switch_register(dev, &sw_desc); + if (IS_ERR(cdns->role_sw)) { + ret = PTR_ERR(cdns->role_sw); + dev_warn(dev, "Unable to register Role Switch\n"); + goto err3; + } } if (cdns->wakeup_irq) { @@ -582,7 +584,8 @@ static int cdns3_probe(struct platform_device *pdev) return 0; err4: cdns3_drd_exit(cdns); - usb_role_switch_unregister(cdns->role_sw); + if (cdns->role_sw) + usb_role_switch_unregister(cdns->role_sw); err3: set_phy_power_off(cdns); err2:
Hardware based role switch is broken as the driver always skips it. Fix this by registering for SW role switch only if 'usb-role-switch' property is present in the device tree. Fixes: 50642709f659 ("usb: cdns3: core: quit if it uses role switch class") Signed-off-by: Roger Quadros <rogerq@ti.com> --- drivers/usb/cdns3/core.c | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-)