Message-Id: <201511192350.58253.linux@rainbow-software.org>
Date:	Thu, 19 Nov 2015 23:50:57 +0100
From:	Ondrej Zary <linux@...nbow-software.org>
To:	Finn Thain <fthain@...egraphics.com.au>
Cc:	Sam Creasey <sammy@...my.net>,
	Michael Schmitz <schmitzmic@...il.com>,
	"James E.J. Bottomley" <JBottomley@...n.com>,
	linux-m68k@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers



On Thursday 19 November 2015 03:24:56 Finn Thain wrote:
> On Wed, 18 Nov 2015, Ondrej Zary wrote:
> > On Wednesday 18 November 2015, Finn Thain wrote:
> > > Like my previous work on the NCR5380 drivers, this patch series has
> > > bug fixes, code cleanup and modernization. These drivers suffer from
> > > mistakes, poor style and neglect and this long series addresses the
> > > worst of it, covering all ten wrapper drivers and both of the core
> > > driver forks. The combined size of the drivers is reduced by about 750
> > > LoC.
> > >
> > > This series continues to reduce divergence between the two core driver
> > > forks, often by copying a bug fix from one to the other. Most patches
> > > are larger for having to keep the two forks in sync. Making the same
> > > change to both is churn if one of them is to be removed but neither
> > > can be as yet. By the end of this series the diff between the two
> > > forks is minimal, so it becomes clear what caused the fork and what
> > > can be done about it.
> > >
> > > This patch series did benefit from scripts/checkpatch.pl but not too
> > > much. Decades ago, these drivers started out with 4-space tabs and if
> > > the 80 column limit were to be strictly enforced now, it would require
> > > adding new functions and shortening identifiers. I would defer this
> > > sort of activity until after the fork has been resolved.
> > >
> > > I have compile-tested all patches to all NCR5380 drivers (x86, ARM,
> > > m68k) and regression tested mac_scsi and dmx3191d modules on suitable
> > > hardware. Testing the mac_scsi and dmx3191d modules provides only
> > > limited coverage. It would be good to see some testing of ISA cards
> > > and Sun 3 and Atari hardware too (I don't have any).
> >
> > I have some NCR5380 ISA cards and can test them.
>
> Thanks Ondrej. I've no idea which ISA drivers are presently working in
> mainline. Finding regressions may be more difficult than usual ;-)

You're right... looks very broken:

[   62.577194] scsi host2: Generic NCR5380/NCR53C400 SCSI, io_port 0x240, n_io_port 16, base 0x0, irq 0, can_queue 16, cmd_per_lun 2, 
sg_tablesize 128, this_id 7, flags { DTC3181E NO_PSEUDO_DMA }, USLEEP_POLL 3, USLEEP_WAITLONG 1250, options { AUTOPROBE_IRQ PSEUDO_DMA 
NCR53C400 }
[   62.796635] scsi 2:0:0:0: Direct-Access     IBM      0663             e    PQ: 0 ANSI: 2
[   63.878494] sd 2:0:0:0: Attached scsi generic sg1 type 0
[   95.848260] sd 2:0:0:0: aborting command

And the system hangs completely.

It's much better with your patches, but still not great :)

[   93.963264] pnp 01:01.00: [io  0x0240-0x025f]
[   93.963493] pnp 01:01.00: [irq 5]
[   93.965768] pnp 01:01.00: activated
[   93.977147] scsi host2: Generic NCR5380/NCR53C400 SCSI, io_port 0x240, n_io_port 16, base 0x0, irq 0, can_queue 16, cmd_per_lun 2, 
sg_tablesize 128, this_id 7, flags { DTC3181E NO_PSEUDO_DMA }, options { AUTOPROBE_IRQ PSEUDO_DMA }
[   93.987527] scsi host2: rejecting message
[   93.987647] Synchronous Data Transfer Request period = 100 ns offset = 12
[   94.001219] scsi 2:0:0:0: Direct-Access     IBM      0663             e    PQ: 0 ANSI: 2
[  113.000794] sd 2:0:0:0: Attached scsi generic sg1 type 0
[  144.852432] sd 2:0:0:0: [sdb] Unit Not Ready
[  144.852574] sd 2:0:0:0: [sdb] Sense Key : Aborted Command [current]
[  144.852713] sd 2:0:0:0: [sdb] Add. Sense: Select or reselect failure
[  240.108292] INFO: task modprobe:1957 blocked for more than 120 seconds.
[  240.108418]       Not tainted 4.3.0-rc1+ #74
[  240.108501] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  240.108597] modprobe        D 0000001a     0  1957   1950 0x00000000
[  240.108790]  ce0fad00 00000086 53881781 0000001a c1525f88 4edbe39c 0000001a 04ac33e5
[  240.109246]  00000000 ccd54000 ffffffff ffffffff d204b280 c139c504 00000000 c104416d
[  240.109699]  00000000 ce0fad00 c1054a45 c151fd8c c151fd8c d204b280 00000000 ccd6d100
[  240.110156] Call Trace:
[  240.110295]  [<c139c504>] ? schedule+0x5b/0x67
[  240.110430]  [<c104416d>] ? async_synchronize_cookie_domain+0x73/0x9f
[  240.110569]  [<c1054a45>] ? abort_exclusive_wait+0x6e/0x6e
[  240.110699]  [<c10ac9bc>] ? do_init_module+0xa4/0x1a3
[  240.110824]  [<c107ddb5>] ? load_module+0x14de/0x18ca
[  240.110948]  [<c107e2a0>] ? SyS_finit_module+0x47/0x56
[  240.111068]  [<c139e2c0>] ? sysenter_do_call+0x12/0x12
[  240.852458] sd 2:0:0:0: [sdb] Read Capacity(10) failed: Result: hostbyte=DID_TIME_OUT driverbyte=DRIVER_SENSE
[  240.852620] sd 2:0:0:0: [sdb] Sense Key : Aborted Command [current]
[  240.852760] sd 2:0:0:0: [sdb] Add. Sense: Select or reselect failure
[  272.852471] sd 2:0:0:0: [sdb] Write Protect is off
[  272.852614] sd 2:0:0:0: [sdb] Mode Sense: 00 00 00 00
[  304.084452] sd 2:0:0:0: [sdb] Asking for cache data failed
[  304.084592] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[  360.108284] INFO: task modprobe:1957 blocked for more than 120 seconds.
[  360.108409]       Not tainted 4.3.0-rc1+ #74
[  360.108492] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  360.108591] modprobe        D 0000001a     0  1957   1950 0x00000000
[  360.108787]  ce0fad00 00000086 53881781 0000001a c1525f88 4edbe39c 0000001a 04ac33e5
[  360.109248]  00000000 ccd54000 ffffffff ffffffff d204b280 c139c504 00000000 c104416d
[  360.109703]  00000000 ce0fad00 c1054a45 c151fd8c c151fd8c d204b280 00000000 ccd6d100
[  360.110158] Call Trace:
[  360.110296]  [<c139c504>] ? schedule+0x5b/0x67
[  360.110430]  [<c104416d>] ? async_synchronize_cookie_domain+0x73/0x9f
[  360.110568]  [<c1054a45>] ? abort_exclusive_wait+0x6e/0x6e
[  360.110699]  [<c10ac9bc>] ? do_init_module+0xa4/0x1a3
[  360.110823]  [<c107ddb5>] ? load_module+0x14de/0x18ca
[  360.110945]  [<c107e2a0>] ? SyS_finit_module+0x47/0x56
[  360.111065]  [<c139e2c0>] ? sysenter_do_call+0x12/0x12
[  431.060488] sd 2:0:0:0: [sdb] Read Capacity(10) failed: Result: hostbyte=DID_TIME_OUT driverbyte=DRIVER_SENSE
[  431.060650] sd 2:0:0:0: [sdb] Sense Key : Aborted Command [current]
[  431.060791] sd 2:0:0:0: [sdb] Add. Sense: Select or reselect failure
[  480.108282] INFO: task modprobe:1957 blocked for more than 120 seconds.
[  480.108405]       Not tainted 4.3.0-rc1+ #74
[  480.108488] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  480.108585] modprobe        D 0000001a     0  1957   1950 0x00000000
[  480.108779]  ce0fad00 00000086 53881781 0000001a c1525f88 4edbe39c 0000001a 04ac33e5
[  480.109236]  00000000 ccd54000 ffffffff ffffffff d204b280 c139c504 00000000 c104416d
[  480.109689]  00000000 ce0fad00 c1054a45 c151fd8c c151fd8c d204b280 00000000 ccd6d100
[  480.110145] Call Trace:
[  480.110282]  [<c139c504>] ? schedule+0x5b/0x67
[  480.110417]  [<c104416d>] ? async_synchronize_cookie_domain+0x73/0x9f
[  480.110556]  [<c1054a45>] ? abort_exclusive_wait+0x6e/0x6e
[  480.110685]  [<c10ac9bc>] ? do_init_module+0xa4/0x1a3
[  480.110810]  [<c107ddb5>] ? load_module+0x14de/0x18ca
[  480.110932]  [<c107e2a0>] ? SyS_finit_module+0x47/0x56
[  480.111052]  [<c139e2c0>] ? sysenter_do_call+0x12/0x12
[  495.062082] sd 2:0:0:0: [sdb] Attached SCSI disk

-- 
Ondrej Zary
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