Message-Id: <200705251520.12192.mb@bu3sch.de>
Date:	Fri, 25 May 2007 15:20:11 +0200
From:	Michael Buesch <mb@...sch.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"Uwe Bugla" <uwe.bugla@....de>, linux-kernel@...r.kernel.org,
	linux-wireless@...r.kernel.org,
	"John W. Linville" <linville@...driver.com>
Subject: Re: BUG in 2.6.22-rc2-mm1: NIC module b44.c broken (Broadcom 4400)

On Friday 25 May 2007 15:12:09 Michael Buesch wrote:
> On Thursday 24 May 2007 22:06:59 Andrew Morton wrote:
> > On Thu, 24 May 2007 21:56:16 +0200
> > "Uwe Bugla" <uwe.bugla@....de> wrote:
> > 
> > > Hi everybody,
> > 
> > (added linux-wireless, others)
> > 
> > > The patch against b44.c contained in 2.6.22-rc2-mm1 has two consequences:
> > > 
> > > 1. a tight binding to module ssb whose function or necessity I neither see through nor do comprehend
> > > 
> > > 2. a breakdown (disfunctionality) of my onboard NIC.
> > > 
> > > lspci -v looks like this:
> > > 
> > > 00:00.0 Host bridge: Intel Corporation 82845G/GL[Brookdale-G]/GE/PE DRAM Controller/Host-Hub Interface (rev 02)
> > > 	Subsystem: ASUSTeK Computer Inc. Unknown device 80b2
> > > 	Flags: bus master, fast devsel, latency 0
> > > 	Memory at f8000000 (32-bit, prefetchable) [size=64M]
> > > 	Capabilities: [e4] Vendor Specific Information
> > > 	Capabilities: [a0] AGP version 2.0
> > > 
> > > 00:01.0 PCI bridge: Intel Corporation 82845G/GL[Brookdale-G]/GE/PE Host-to-AGP Bridge (rev 02) (prog-if 00 [Normal decode])
> > > 	Flags: bus master, 66MHz, fast devsel, latency 64
> > > 	Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
> > > 	I/O behind bridge: 0000d000-0000dfff
> > > 	Memory behind bridge: f2000000-f27fffff
> > > 	Prefetchable memory behind bridge: f3f00000-f7ffffff
> > > 
> > > 00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 02) (prog-if 00 [UHCI])
> > > 	Subsystem: ASUSTeK Computer Inc. Unknown device 8089
> > > 	Flags: bus master, medium devsel, latency 0, IRQ 17
> > > 	I/O ports at b800 [size=32]
> > > 
> > > 00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 02) (prog-if 00 [UHCI])
> > > 	Subsystem: ASUSTeK Computer Inc. Unknown device 8089
> > > 	Flags: bus master, medium devsel, latency 0, IRQ 20
> > > 	I/O ports at b400 [size=32]
> > > 
> > > 00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 02) (prog-if 00 [UHCI])
> > > 	Subsystem: ASUSTeK Computer Inc. Unknown device 8089
> > > 	Flags: bus master, medium devsel, latency 0, IRQ 16
> > > 	I/O ports at b000 [size=32]
> > > 
> > > 00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 02) (prog-if 20 [EHCI])
> > > 	Subsystem: ASUSTeK Computer Inc. Unknown device 8089
> > > 	Flags: bus master, medium devsel, latency 0, IRQ 18
> > > 	Memory at f1800000 (32-bit, non-prefetchable) [size=1K]
> > > 	Capabilities: [50] Power Management version 2
> > > 	Capabilities: [58] Debug port
> > > 
> > > 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 82) (prog-if 00 [Normal decode])
> > > 	Flags: bus master, fast devsel, latency 0
> > > 	Bus: primary=00, secondary=02, subordinate=02, sec-latency=32
> > > 	Memory behind bridge: f1000000-f17fffff
> > > 	Prefetchable memory behind bridge: f2800000-f3efffff
> > > 
> > > 00:1f.0 ISA bridge: Intel Corporation 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge (rev 02)
> > > 	Flags: bus master, medium devsel, latency 0
> > > 
> > > 00:1f.1 IDE interface: Intel Corporation 82801DB (ICH4) IDE Controller (rev 02) (prog-if 8a [Master SecP PriP])
> > > 	Subsystem: ASUSTeK Computer Inc. Unknown device 8089
> > > 	Flags: bus master, medium devsel, latency 0, IRQ 16
> > > 	I/O ports at 01f0 [size=8]
> > > 	I/O ports at 03f4 [size=1]
> > > 	I/O ports at 0170 [size=8]
> > > 	I/O ports at 0374 [size=1]
> > > 	I/O ports at f000 [size=16]
> > > 	Memory at 30000000 (32-bit, non-prefetchable) [size=1K]
> > > 
> > > 00:1f.3 SMBus: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 02)
> > > 	Subsystem: ASUSTeK Computer Inc. Unknown device 8089
> > > 	Flags: medium devsel, IRQ 19
> > > 	I/O ports at e800 [size=32]
> > > 
> > > 00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 02)
> > > 	Subsystem: ASUSTeK Computer Inc. Unknown device 80b0
> > > 	Flags: bus master, medium devsel, latency 0, IRQ 19
> > > 	I/O ports at a800 [size=256]
> > > 	I/O ports at a400 [size=64]
> > > 	Memory at f0800000 (32-bit, non-prefetchable) [size=512]
> > > 	Memory at f0000000 (32-bit, non-prefetchable) [size=256]
> > > 	Capabilities: [50] Power Management version 2
> > > 
> > > 01:00.0 VGA compatible controller: ATI Technologies Inc Rage 128 PF/PRO AGP 4x TMDS (prog-if 00 [VGA])
> > > 	Subsystem: ATI Technologies Inc Rage Fury Pro/Xpert 2000 Pro
> > > 	Flags: bus master, stepping, 66MHz, medium devsel, latency 64, IRQ 17
> > > 	Memory at f4000000 (32-bit, prefetchable) [size=64M]
> > > 	I/O ports at d800 [size=256]
> > > 	Memory at f2000000 (32-bit, non-prefetchable) [size=16K]
> > > 	Expansion ROM at f3fe0000 [disabled] [size=128K]
> > > 	Capabilities: [50] AGP version 2.0
> > > 	Capabilities: [5c] Power Management version 2
> > > 
> > > 02:05.0 Ethernet controller: Broadcom Corporation BCM4401 100Base-T (rev 01)
> > > 	Subsystem: ASUSTeK Computer Inc. A7V8X motherboard
> > > 	Flags: bus master, fast devsel, latency 32, IRQ 255
> > > 	Memory at f1000000 (32-bit, non-prefetchable) [disabled] [size=8K]
> > > 	Capabilities: [40] Power Management version 2
> > > 
> > > 02:0b.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11)
> > > 	Subsystem: Pinnacle Systems Inc. PCTV Sat (DBC receiver)
> > > 	Flags: bus master, medium devsel, latency 32, IRQ 18
> > > 	Memory at f3000000 (32-bit, prefetchable) [size=4K]
> > > 	Capabilities: [44] Vital Product Data
> > > 	Capabilities: [4c] Power Management version 2
> > > 
> > > 02:0b.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11)
> > > 	Subsystem: Pinnacle Systems Inc. PCTV Sat (DBC receiver)
> > > 	Flags: bus master, medium devsel, latency 32, IRQ 18
> > > 	Memory at f2800000 (32-bit, prefetchable) [size=4K]
> > > 	Capabilities: [44] Vital Product Data
> > > 	Capabilities: [4c] Power Management version 2
> > > 
> > > Please note:
> > > 
> > > 1. IRQ 255 looks very idiotic, doesn't it? It does not exist at all, does it?
> > > 
> > > Questions:
> > > 
> > > 1. What is the technical need / progress of module ssb please?
> > > 
> > > 2. If Andrew Morton's guidelines clearly say: "Do test your patches on three different machines" and this guideline seems to be strictly ignored by some sparetime hackers:
> > > 
> > > What is the master plan then to avoid the fact that such a crap is being sent in to Andrew?
> > > 
> > > Yours sincerely
> > > 
> > > Uwe
> > > 
> > > P. S.: There is an important saying going like this:
> > > 
> > > Too many cooks do mess up the pap.
> > > 
> > > Regarding the patch in mm-tree I can see SIX (!) Copyright owners.
> > > The last one of them (i. e. the one of 2007) obviuosly does not seem to understand what he is doing (see that nonsense interrupt please, just incredible!) :(
> > > 
> > > In so far I would deeply appreciate Andrew Morton to throw that b44.c patch into the trashbox as soon as possible :)
> > > 
> > 
> > The code presumably worked for the developer.  The reason for merging it
> > into -mm is to allow others to identify problems such as these before the
> > code hits mainline.
> > 
> > Having bugs in -mm is normal, natural and expected.  What I _do_ very much
> > prefer to see is that these bugs get fixed promptly and, critically, that
> > the code doesn't go into Linus's tree until all the known bugs are
> > repaired.
> > 
> > Also, it's really bad when a bug makes the entire -mm release unusable for
> > testers.  Because this means that all the _other_ people who have code
> > being tested in -mm just lost a tester.  And it can cause people to just
> > not bother testing -mm kernels at all, which means that more badness will
> > get into mainline.
> 
> You are talking a _lot_ of bullshit, and I'd really like to tell
> you to fuck off, because you have no clue how software development works.
> 
> But I (as the primary developer of ssb) like to resolve the issue, too.
> Please provide more information on the actual _issue_.
> In this whole mail you basically only state that:
> > IRQ 255 looks very idiotic, doesn't it?
> Explain that in detail, please. Why do you think it's wrong?
> Which IRQ number do you get with the old b44 driver?
> 
> Thanks for your testing. That is why -mm exists.
> Next time without bullshitting, please.

Ok, people already call me that I am an idiot to tell Andrew to fuck off.
Well, I did not. ;)
My mail client just put him into the To: field. This mail was for
the original author of the bugreport.

-- 
Greetings Michael.
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