3.8-stable review patch. If anyone has any objections, please let me know.
------------------ From: Ming Lei <[email protected]> commit 25736e0c8269e9613aa6036fbc591818daa30d14 upstream. This patch let glue driver return -EPROBE_DEFER if the transceiver is not readly, so we can support defer probe on musb to fix the below error on 3.7-rc5 if transceiver drivers are built as module: [ 19.052490] unable to find transceiver of type USB2 PHY [ 19.072052] HS USB OTG: no transceiver configured [ 19.076995] musb-hdrc musb-hdrc.0.auto: musb_init_controller failed with status -19 [ 19.089355] musb-hdrc: probe of musb-hdrc.0.auto rejects match -19 [ 19.096771] driver: 'musb-omap2430': driver_bound: bound to device 'musb-omap2430' [ 19.105194] bus: 'platform': really_probe: bound device musb-omap2430 to driver musb-omap2430 [ 19.174407] bus: 'platform': add driver twl4030_usb [ 19.179656] bus: 'platform': driver_probe_device: matched device twl4030_usb with driver twl4030_usb [ 19.202270] bus: 'platform': really_probe: probing driver twl4030_usb with device twl4030_usb [ 19.214172] twl4030_usb twl4030_usb: HW_CONDITIONS 0xc0/192; link 3 [ 19.239624] musb-omap2430 musb-omap2430: musb core is not yet ready [ 19.246765] twl4030_usb twl4030_usb: Initialized TWL4030 USB module [ 19.254516] driver: 'twl4030_usb': driver_bound: bound to device 'twl4030_usb' [ 19.263580] bus: 'platform': really_probe: bound device twl4030_usb to driver twl4030_usb Cc: Sebastian Andrzej Siewior <[email protected]> Signed-off-by: Ming Lei <[email protected]> Signed-off-by: Felipe Balbi <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/usb/musb/am35x.c | 2 +- drivers/usb/musb/blackfin.c | 2 +- drivers/usb/musb/da8xx.c | 7 +++++-- drivers/usb/musb/davinci.c | 7 +++++-- drivers/usb/musb/musb_dsps.c | 2 +- drivers/usb/musb/omap2430.c | 2 +- drivers/usb/musb/tusb6010.c | 2 +- drivers/usb/musb/ux500.c | 2 +- 8 files changed, 16 insertions(+), 10 deletions(-) --- a/drivers/usb/musb/am35x.c +++ b/drivers/usb/musb/am35x.c @@ -365,7 +365,7 @@ static int am35x_musb_init(struct musb * usb_nop_xceiv_register(); musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); if (IS_ERR_OR_NULL(musb->xceiv)) - return -ENODEV; + return -EPROBE_DEFER; setup_timer(&otg_workaround, otg_timer, (unsigned long) musb); --- a/drivers/usb/musb/blackfin.c +++ b/drivers/usb/musb/blackfin.c @@ -406,7 +406,7 @@ static int bfin_musb_init(struct musb *m musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); if (IS_ERR_OR_NULL(musb->xceiv)) { gpio_free(musb->config->gpio_vrsel); - return -ENODEV; + return -EPROBE_DEFER; } bfin_musb_reg_init(musb); --- a/drivers/usb/musb/da8xx.c +++ b/drivers/usb/musb/da8xx.c @@ -410,6 +410,7 @@ static int da8xx_musb_init(struct musb * { void __iomem *reg_base = musb->ctrl_base; u32 rev; + int ret = -ENODEV; musb->mregs += DA8XX_MENTOR_CORE_OFFSET; @@ -420,8 +421,10 @@ static int da8xx_musb_init(struct musb * usb_nop_xceiv_register(); musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); - if (IS_ERR_OR_NULL(musb->xceiv)) + if (IS_ERR_OR_NULL(musb->xceiv)) { + ret = -EPROBE_DEFER; goto fail; + } setup_timer(&otg_workaround, otg_timer, (unsigned long)musb); @@ -441,7 +444,7 @@ static int da8xx_musb_init(struct musb * musb->isr = da8xx_musb_interrupt; return 0; fail: - return -ENODEV; + return ret; } static int da8xx_musb_exit(struct musb *musb) --- a/drivers/usb/musb/davinci.c +++ b/drivers/usb/musb/davinci.c @@ -380,11 +380,14 @@ static int davinci_musb_init(struct musb { void __iomem *tibase = musb->ctrl_base; u32 revision; + int ret = -ENODEV; usb_nop_xceiv_register(); musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); - if (IS_ERR_OR_NULL(musb->xceiv)) + if (IS_ERR_OR_NULL(musb->xceiv)) { + ret = -EPROBE_DEFER; goto unregister; + } musb->mregs += DAVINCI_BASE_OFFSET; @@ -438,7 +441,7 @@ fail: usb_put_phy(musb->xceiv); unregister: usb_nop_xceiv_unregister(); - return -ENODEV; + return ret; } static int davinci_musb_exit(struct musb *musb) --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -419,7 +419,7 @@ static int dsps_musb_init(struct musb *m usb_nop_xceiv_register(); musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); if (IS_ERR_OR_NULL(musb->xceiv)) - return -ENODEV; + return -EPROBE_DEFER; /* Returns zero if e.g. not clocked */ rev = dsps_readl(reg_base, wrp->revision); --- a/drivers/usb/musb/omap2430.c +++ b/drivers/usb/musb/omap2430.c @@ -369,7 +369,7 @@ static int omap2430_musb_init(struct mus musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); if (IS_ERR_OR_NULL(musb->xceiv)) { pr_err("HS USB OTG: no transceiver configured\n"); - return -ENODEV; + return -EPROBE_DEFER; } musb->isr = omap2430_musb_interrupt; --- a/drivers/usb/musb/tusb6010.c +++ b/drivers/usb/musb/tusb6010.c @@ -1069,7 +1069,7 @@ static int tusb_musb_init(struct musb *m usb_nop_xceiv_register(); musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); if (IS_ERR_OR_NULL(musb->xceiv)) - return -ENODEV; + return -EPROBE_DEFER; pdev = to_platform_device(musb->controller); --- a/drivers/usb/musb/ux500.c +++ b/drivers/usb/musb/ux500.c @@ -61,7 +61,7 @@ static int ux500_musb_init(struct musb * musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); if (IS_ERR_OR_NULL(musb->xceiv)) { pr_err("HS USB OTG: no transceiver configured\n"); - return -ENODEV; + return -EPROBE_DEFER; } musb->isr = ux500_musb_interrupt; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
