On Thu 14 May 23:29 PDT 2020, Felipe Balbi wrote:

Hi,

Georgi Djakov [off-list ref] writes:

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Sandeep Maheswaram [off-list ref] writes:

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+static int dwc3_qcom_interconnect_init(struct dwc3_qcom *qcom)
+{
+	struct device *dev = qcom->dev;
+	int ret;
+
+	if (!device_is_bound(&qcom->dwc3->dev))
+		return -EPROBE_DEFER;

this breaks allmodconfig. I'm dropping this series from my queue for
this merge window.

Sorry, I meant this patch ;-)

I guess that's due to INTERCONNECT being a module. There is currently a

I believe it's because of this:
ERROR: modpost: "device_is_bound" [drivers/usb/dwc3/dwc3-qcom.ko] undefined!

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discussion about this  with Viresh and Georgi in response to another
automated build failure. Viresh suggests changing CONFIG_INTERCONNECT
from tristate to bool, which seems sensible to me given that interconnect
is a core subsystem.

The problem you are talking about would arise when INTERCONNECT=m and
USB_DWC3_QCOM=y and it definitely exists here and could be triggered with
randconfig build. So i suggest to squash also the diff below.

Thanks,
Georgi

---8<---

diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 206caa0ea1c6..6661788b1a76 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig

@@ -129,6 +129,7 @@ config USB_DWC3_QCOM
 	tristate "Qualcomm Platform"
 	depends on ARCH_QCOM || COMPILE_TEST
 	depends on EXTCON || !EXTCON
+	depends on INTERCONNECT || !INTERCONNECT

I would prefer to see a patch adding EXPORT_SYMBOL_GPL() to device_is_bound()

Agree, but just to clarify, that these are two separate issues that need to
be fixed. The device_is_bound() is the first one and USB_DWC3_QCOM=y combined
with INTERCONNECT=m is the second one.

If INTERCONNECT=m, QCOM3 shouldn't be y. I think the following is
enough:

	depends on INTERCONNECT=y || INTERCONNECT=USB_DWC3_QCOM

This misses the case where INTERCONNECT=n and USB_DWC3_QCOM=[ym] which
I don't see a reason for breaking.

But if only INTERCONNECT where a bool, then we don't need to specify a
depends on, because it will either be there, or the stubs will.
We've come to this conclusion in a lot of different frameworks and I
don't see why we should do this differently with INTERCONNECT.

Regards,
Bjorn