libata EH used to ignore errors not associated with commands when
determining whether speed down is necessary or not.  This leads to the
following problems.

* Errors not associated with commands can occur indefinitely without
  libata EH taking corrective actions.

* Upstream link errors don't trigger speed down when PMP is attached
  to it and commands issued to downstream device trigger errors on the
  upstream link.

This patch makes ata_eh_link_autopsy() consider errors not associated
with command for speed down.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Reset failure is a critical error.  It results in disabling the link
requiring user intervention to re-enable it.  Make reset failure
handling more robust such that libata EH doesn't give up too early.

* Temporary glitches during hardreset may lead to classification
  failure when there's no softreset available.  Retry instead of
  giving up.

* Initial softreset or follow up softreset may fail classification.
  Move classification error handling block out of followup softreset
  block such that both cases are handled and retry instead of giving
  up.  Also, on the last try, give ATA class a blind shot.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Clean up and reorganize ata_eh_reset() to ease further changes.

* Cache ARRAY_SIZE(ata_eh_reset_timeouts) in @max_tries.
* Cache link->flags in @lflags.
* Move failure handling block to the end of the function and unnest
  both success and failure handling blocks.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

As jiffies changes asynchronously, it needs to be cached if unchanging
timestamp is needed.  The code in ata_eh_reset() intended to do that
with @now but never actually did it.  Fix it.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Commands sent to ATAPI tape drives via the SCSI generic (sg) driver are
limited in the amount of data that they can transfer by the max_sectors
value.  The max_sectors value is currently calculated according to the
command set for disk drives, which doesn't apply to tape drives.  The
default max_sectors value of 256 limits ATAPI tape drive commands to
128 KB.  This patch against 2.6.24-rc1 increases the max_sectors value
for tape drives to 65535, which permits tape drive commands to transfer
just under 32 MB.

Tested with a SuperMicro PDSME motherboard, AHCI, and a Sony SDX-570V
SATA tape drive.

Note that some of the chipset drivers also set their own max_sectors
value, which may override the value set in libata-core.  I don't have
any of these chipsets to test, so I didn't go messing with them.  Also,
ATAPI devices other than tape drives may benefit from similar changes,
but I have only tape drives and disk drives to test.
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

The original workaround for the Promise ASIC PRD bug
contained an endianess bug which I failed to detect:
the adjustment of the last PRD entry's length field
applied host arithmetic to little-endian data, which
is incorrect on big-endian machines.

We have the length available in host-endian format, so
do the adjustment on host-endian data and then convert
and store it in the PRD entry's little-endian data field.

Thanks to an anonymous reviewer for detecting this bug.
Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Fix docbook format in the comments.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

ata_scsi_lpm_get() can become static.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/ata/libata-core.c:768: warning: 'ata_lpm_enable' defined but not used
drivers/ata/libata-core.c:784: warning: 'ata_lpm_disable' defined but not used
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Signed-off-by: ashish kalra <ashish.kalra@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Signed-off-by: ashish kalra <ashish.kalra@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Signed-off-by: ashish kalra <ashish.kalra@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Remove unneeded on-stack copy of FIS
in sata_fsl_cache_taskfile_from_d2h_fis().
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

SCRs in the driver map to the standard values found in include/linux/ata.h,
so no need for individual scr_read/scr_write case statements duplicating
the natural value.
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Powerpc uses virtual irq which has to be unmapped.
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Update the driver to use the newly added ata_link structure.
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

The Jazz machines have to use the PIT timer for dyntick and highresolution
kernels.  This may break because currently just like i386 used to do MIPS
uses two separate spinlocks in the actual PIT code and the PC speaker
code.  So switch to do it the same that x86 currently does PIT locking.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: linux-input mailing list moved to vger.kernel.org
  Input: inport, logibm - use KERN_INFO when reporting missing mouse
  Input: appletouch - idle reset logic broke older Fountains
  Input: hp_sdc.c - fix section mismatch
  Input: appletouch - add Johannes Berg as maintainer
  Input: Add Euro and Dollar key codes
  Input: xpad - add more USB IDs

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (25 commits)
  [MIPS] Jazz: disable PIT; cleanup R4030 clockevent
  [MIPS] Bigsur supports highmem.
  [MIPS] mtx-1: Enable -Werror.
  [MIPS] mtx-1: Remove unused mtx1_sys_btn.
  [MIPS] Pb1200: Enable -Werror.
  [MIPS] Fix and cleanup the MIPS part of the (ab)use of CLOCK_TICK_RATE.
  [MIPS] SNI: register a02r clockevent; don't use PIT timer
  [MIPS] i8253.h: Remove all i8259 related definitions.
  [MIPS] i8253: Cleanup.
  [MIPS] Cobalt: Fix IRQ comment; the Cobalt kernel uses CP0 counter now.
  [MIPS] Pb1200: Fix warning.
  [MIPS] Pb1200: Fix warning.
  [MIPS] IP27: Fix build error.
  [MIPS] Excite: Fix build error.
  [MIPS] Sibyte: Split and move clock code.
  [MIPS] Sibyte: Fixes for oneshot timer mode.
  [MIPS] Sibyte: Remove blank line.
  [MIPS] Swarm: Fix build failure
  [MIPS] time: Code cleanups
  [MIPS] time: Remove now unused local_timer_interrupt.
  ...

* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
  [WATCHDOG] iTCO_wdt.c ICH8 pci-device-id's
  [WATCHDOG] iTCO_wdt.c init & exit fixes
  [WATCHDOG] iTCO_wdt.c pci_device_id table clean-up
  [WATCHDOG] spin_lock_init() fixes
  [WATCHDOG] Unlock in iTCO_wdt_start when reboot is disabled
  [WATCHDOG] Add necessary braces to if (...) \n #if... cases
  [WATCHDOG] trivial fix two returns in void functions

Add the pci-device-id's for the ICH8M and the ICH8M-E chipsets.
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

Mark init and exit procedures as __devinit & _-devexit.
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

Make the pci_device_id table more readable.
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

Some watchdog drivers initialize global spinlocks in module's init function
which is tolerable, but some do it in PCI probe function.  So, switch to
static initialization to fix theoretical bugs and, more importantly, stop
giving people bad examples.
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Fix ISA irq acknowledge.
Make r4030 clockevent code look like other mips clockevent code.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

This is the clock rate of the i8253 PIT.  A MIPS system may not have
a PIT by the symbol is used all over the kernel including some APIs.
So keeping it defined to the number for the PIT is the only sane thing
for now.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Register A20R clockevent.
Remove PIT timer setup because it doesn't work
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/au1000/pb1200/irqmap.c:101: warning: ignoring return value of 'request_irq', declared with attribute warn_unused_result

And while at it a few coding style cleanups.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>