Re: [PATCH 00/71] More fixes, cleanup and modernization for NCR5380 drivers

Ondrej Zary
2015-11-19T22:51:14Z

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