linux-kernel - Re: [PATCH] ide-floppy fix

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Message-Id: <200807161759.16803.bzolnier@gmail.com>
Date:	Wed, 16 Jul 2008 17:59:16 +0200
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	petkovbb@...il.com
Cc:	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	stable@...nel.org
Subject: Re: [PATCH] ide-floppy fix


Hi,

On Tuesday 15 July 2008, Borislav Petkov wrote:

[...]

> On a different note, the current pata tree on top of v2.6.25-2125-g50515af blows
> up here with the following error:
> 
> [    4.296729] Uniform Multi-Platform E-IDE driver
> [    4.297905] ICH4: IDE controller (0x8086:0x24cb rev 0x02) at  PCI slot 0000:00:1f.1
> [    4.297986] ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 18 (level, low) -> IRQ 18
> [    4.298153] ICH4: not 100% native mode: will probe irqs later
> [    4.298213]     ide0: BM-DMA at 0xfc00-0xfc07
> [    4.298282]     ide1: BM-DMA at 0xfc08-0xfc0f
> [    4.561768] hda: QUANTUM FIREBALLlct10 20, ATA DISK drive
> [    4.816724] hdb: SAMSUNG SP2014N, ATA DISK drive
> [    4.867959] hda: drive side 80-wire cable detection failed, limiting max speed to UDMA33
> [    4.868027] hda: UDMA/33 mode selected
> [    4.868441] hdb: UDMA/100 mode selected
> [    5.540683] hdc: IOMEGA ZIP 100 ATAPI, ATAPI FLOPPY drive
> [    5.795564] hdd: IC35L120AVV207-0, ATA DISK drive
> [    5.847295] hdd: host side 80-wire cable detection failed, limiting max speed to UDMA33
> [    5.847362] hdd: UDMA/33 mode selected
> [    5.847715] ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> [    5.855487] ide1 at 0x170-0x177,0x376 on irq 15
> [    5.875927] ide_generic: please use "probe_mask=0x3f" module parameter for probing all legacy ISA IDE ports
> [    5.876012] ide_generic: I/O resource 0x1F0-0x1F7 not free.
> [    5.876074] ide_generic: I/O resource 0x170-0x177 not free.
> [   11.342504] hde: no response (status = 0xa1), resetting drive
> [   17.206535] hdf: no response (status = 0xa1), resetting drive

hde? hdf?

[...]

> I tracked the error down to the call to ide_register_port(hwif) in
> ide-probe.c:ide_host_register() which does device_register(&hwif->gendev) and
> the hwif->gendev->kobj seems unitialized thus the WARN_ON on its refcount in
> kref_get(). Will look into it more when i get some free time.

Unfortunately I couldn't reproduce this problem here (2.6.26 + pata tree)
so please try to debug it and/or narrow it down to the guilty change.

> --
> From: Borislav Petkov <petkovbb@...il.com>
> 
> Check the correct flags-location for set features.
> 
> Signed-off-by: Borislav Petkov <petkovbb@...il.com>

Thanks, I folded the fix into original patch (->dev_flags is not yet
upstream so -stable fix shouldn't be necessary).

While on it: I later noticed that there will be also need for common
ATA/ATAPI ->dev_flags in the future so I wonder whether current
->dev_flags should be renamed to ->atapi_flags (& s/*DFLAG*/*AFLAG*/).

If there is agreement on this I'll fix it in pata tree.
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