RE: [PATCH 2/3] usb: renesas_usbhs: enable DVSE interrupt

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Hi Eugeniu,

> From: Eugeniu Rosca, Sent: Thursday, August 30, 2018 7:54 PM
> 
> Commit [1] enabled the possibility of checking the DVST (Device State
> Transition) bit of INTSTS0 (Interrupt Status Register 0) and calling
> the irq_dev_state() handler if the DVST bit is set. But neither
> commit [1] nor commit [2] actually enabled the DVSE (Device State
> Transition Interrupt Enable) bit in the INTENB0 (Interrupt Enable
> Register 0). As a consequence, irq_dev_state() handler is getting
> called as a side effect of other (non-DVSE) interrupts being fired,
> which definitely can't be relied upon, if DVST notifications are of
> any value.
> 
> Why this doesn't hurt is because usbhsg_irq_dev_state() currently
> doesn't do much except of a dev_dbg(). Once more work is added to
> the handler (e.g. detecting device "Suspended" state and notifying
> other USB gadget components about it), enabling DVSE becomes a hard
> requirement. Do it in a standalone commit for better visibility and
> clear explanation.
> 
> [1] f1407d5c6624 ("usb: renesas_usbhs: Add Renesas USBHS common code")
> [2] 2f98382dcdfe ("usb: renesas_usbhs: Add Renesas USBHS Gadget")
> 
> Signed-off-by: Eugeniu Rosca <erosca@xxxxxxxxxxxxxx>
> ---

Thank you for the patch!

Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>

Best regards,
Yoshihiro Shimoda





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