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Subject[PATCH 2/4] usb: dwc3: dwc3-omap: return -EPROBE_DEFER if probe has not yet executed
Date
return -EPROBE_DEFER from dwc3_omap_mailbox in dwc3-omap.c, if the probe of
dwc3-omap has not yet been executed or failed.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/usb/dwc3/dwc3-omap.c | 7 +++++--
include/linux/usb/dwc3-omap.h | 6 +++---
2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index 19c6e72..9428f4e 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -138,11 +138,14 @@ static inline void dwc3_omap_writel(void __iomem *base, u32 offset, u32 value)
writel(value, base + offset);
}

-void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
+int dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
{
u32 val;
struct dwc3_omap *omap = _omap;

+ if (!omap)
+ return -EPROBE_DEFER;
+
switch (status) {
case OMAP_DWC3_ID_GROUND:
dev_dbg(omap->dev, "ID GND\n");
@@ -185,7 +188,7 @@ void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
dev_dbg(omap->dev, "ID float\n");
}

- return;
+ return IRQ_HANDLED;
}
EXPORT_SYMBOL_GPL(dwc3_omap_mailbox);

diff --git a/include/linux/usb/dwc3-omap.h b/include/linux/usb/dwc3-omap.h
index 51eae14..5615f4d 100644
--- a/include/linux/usb/dwc3-omap.h
+++ b/include/linux/usb/dwc3-omap.h
@@ -19,11 +19,11 @@ enum omap_dwc3_vbus_id_status {
};

#if (defined(CONFIG_USB_DWC3) || defined(CONFIG_USB_DWC3_MODULE))
-extern void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status);
+extern int dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status);
#else
-static inline void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
+static inline int dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
{
- return;
+ return -ENODEV;
}
#endif

--
1.7.10.4


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