Re: kernel BUG in new r8188eu

Greg Kroah-Hartman
2021-08-02T18:33:00Z

On Mon, Aug 02, 2021 at 01:45:06PM +0200, Fabio M. De Francesco wrote:
> Hi Greg,
>
> On Monday, August 2, 2021 12:36:18 PM CEST Greg Kroah-Hartman wrote:
> > On Sun, Aug 01, 2021 at 03:15:52PM -0500, Larry Finger wrote:
> > > On 8/1/21 1:31 AM, Greg Kroah-Hartman wrote:
> > > > I am worried that my "remove the wrapper" logic got something wrong
> > > > here, so if you could test the revert of that, I would appreciate it.
> > > >
> > > > I think I need to go buy one of these devices so I can test cleanups
> > > > locally...
> > >
> > > The bad commit was 9ff1cc4ef80e ("staging: r8188eu: remove rtw_buf_free()
> > > function").
> > >
> > > Looking at it, the only difference between the original wrapper and the
> new
> > > code is that the wrapper zeros the len variable before the kfree() call,
> but
> > > making that change did not help. Reverting that patch restores the old
> > > behavior.
> >
> > Ah, doh, that was my fault, sorry, that patch was incorrect (odd git id,
> > don't know where that came from, it's a different id in my tree.) Let
> > me revert this commit and then will redo it correctly.
>
> The commit to revert should be c7e88ecbe328.

Yes, thanks, now reverted.

> > thanks for finding this.
> >
> > > There are lots of these on Ebay from $2.47 up with free shipping!
> >
> > Any hints on the name for how to figure out which devices are supported
> > by this driver?
>
> The following link points to a device that seems to be supported by this
> driver. It is just $4.99, but I'm not sure whether or not they ship to Europe
> (I suppose you're here):
>
> https://www.amazon.com/gp/product/B00L28AN88/ref=ox_sc_act_title_1

Yeah, I'm in Europe, I'll try to find something within the EU to avoid
the mess with importing electronics and duties. It's a mess everytime I
do that...

> About this item:
> * Chipset:RTL8188EU
> * Standard: IEEE 802.11n,IEEE 802.11g, IEEE 802.11b
> * Supports 64/128 bit WEP, WPA encryption
>
> Otherwise, I think that the following uses the same chip as the above.
> However, it costs a little more and, above all else, I'm not really sure if it
> works with r8188eu, since they write that the chip is a Realtek RTL8188EUS
> (please note that final "EUS"):
>
> https://www.amazon.it/Asus-USB-N10-NANO-N150-compatibile/dp/B081758CWC/
> ref=sr_1_1

Yeah, I found a bunch of "EUS" devices here, will keep digging.

thanks,

greg k-h