[PATCH] rtl8xxxu: Stop log spam from each successful interrupt

[Jes Sorensen]

Joe Perches <joe at perches.com> writes:
> On Sat, 2016-09-17 at 12:09 -0500, Larry Finger wrote:
>> As soon as debugging is turned on, the logs are filled with messages
>> reporting the interrupt status. As this quantity is usually zero, this
>> output is not needed. In fact, there will be a report if the status is
>> not zero, thus the debug line in question could probably be deleted.
>> Rather than taking that action, I have changed it to only be printed
>> when the RTL8XXXU_DEBUG_USB bit is set in the debug mask.
>
> There are many uses of
> 	if (rtl8xxxu_debug & <DEFINE>) {
> 		dev_info(dev, ...)
>
> Emitting debugging information at KERN_INFO is odd.

Not at all, it's a pain to enable it in debug fs post loading the
driver, especially if you need the output immediately during driver
init. That is why the flags are there.

> I think it'd be nicer to use dev_dbg for all these cases
> and as well use some new macro that includes the test
>
> Something like:
>
> #define rtl8xxxu_dbg(type, fmt, ...)			\
> do {							\
> 	if (rtl8xxxu_debug & (type))			\
> 		dev_dbg(dev, fmt, ##__VA_ARGS__);	\
> } while (0)

Yuck yuck yuck, no thanks!

Any attempt of adding that kinda grossness to the driver will get a
NACK.

There is a reason the debug flag is there - it allows you to enable
specific items on driver load. If you enable that flag, expect to see
stuff in your log.

Jes