Re: EHCI bus glue driver works for storage, fails for a WiFi module

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On Sat, 5 Oct 2013, Larry Finger wrote:

> >> I do however have something fishy to report, but this is probably an
> >> off-topic for linux-usb mailing list so I'll just mention it here
> >> briefly for completeness. Fist, I've compared the speed of the
> >> rtl8192cu vs 8192cu in 3.4 kernel. The latter one is the Realtek's
> >> driver. I've did many download tests of the same file and it turns out
> >> 8192cu is 1.5 times faster. Things haven't improved since then. The
> >> 3.12-rc1 rtl8192cu shows the same performance as in 3.4. In addition
> >> with 3.12-rc1 I get some strange messages in the dmesg [1].
> >
> > You may want to bring this to the attention of the wireless
> > maintainers.
> 
> Actually he has. From the logged messages, he must have loaded the driver with 
> extra debugging enabled. (debug=2)
> 
> As for the performance, he appears to be complaining that the Linux version 
> performs better than the vendor one.

The other way around.  rtl8192cu is the driver in the kernel, and
8192cu is RealTek's driver.  Arokux said that 8192cu is faster.  (If
you carefully parse what he wrote, you'll see it says that he did the
comparison using the 3.4 kernel, not that 8192cu is in the 3.4 kernel.)

Alan Stern

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