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  1. 02 3月, 2011 1 次提交
    • T
      libata: fix hotplug for drivers which don't implement LPM · eb0e85e3
      由 Tejun Heo 提交于 
      ata_eh_analyze_serror() suppresses hotplug notifications if LPM is
being used because LPM generates spurious hotplug events.  It compared
whether link->lpm_policy was different from ATA_LPM_MAX_POWER to
determine whether LPM is enabled; however, this is incorrect as for
drivers which don't implement LPM, lpm_policy is always
ATA_LPM_UNKNOWN.  This disabled hotplug detection for all drivers
which don't implement LPM.

Fix it by comparing whether lpm_policy is greater than
ATA_LPM_MAX_POWER.
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: stable@kernel.org
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
      eb0e85e3
  3. 28 1月, 2011 9 次提交
  5. 21 1月, 2011 1 次提交
    • D
      kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT · 6a108a14
      由 David Rientjes 提交于 
      The meaning of CONFIG_EMBEDDED has long since been obsoleted; the option
is used to configure any non-standard kernel with a much larger scope than
only small devices.

This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixes
references to the option throughout the kernel.  A new CONFIG_EMBEDDED
option is added that automatically selects CONFIG_EXPERT when enabled and
can be used in the future to isolate options that should only be
considered for embedded systems (RISC architectures, SLOB, etc).

Calling the option "EXPERT" more accurately represents its intention: only
expert users who understand the impact of the configuration changes they
are making should enable it.
Reviewed-by: NIngo Molnar <mingo@elte.hu>
Acked-by: NDavid Woodhouse <david.woodhouse@intel.com>
Signed-off-by: NDavid Rientjes <rientjes@google.com>
Cc: Greg KH <gregkh@suse.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Robin Holt <holt@sgi.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      6a108a14
  7. 08 1月, 2011 8 次提交
  9. 06 1月, 2011 2 次提交
  11. 27 12月, 2010 1 次提交
    • J
      pata_cs5536: avoid implicit MSR API inclusion on x86-64 · ff5dd32b
      由 Jeff Garzik 提交于 
      We don't need or want MSR usage here, on x86-64.
x86-64 was disabled intentionally in Kconfig, but commit
9272dcc2 changed that.

drivers/ata/pata_cs5536.c:47:1: warning: "rdmsr" redefined
In file included from arch/x86/include/asm/irqflags.h:60,
                 from include/linux/irqflags.h:15,
                 from arch/x86/include/asm/system.h:11,
                 from arch/x86/include/asm/processor.h:17,
                 from include/linux/prefetch.h:14,
                 from include/linux/list.h:7,
                 from include/linux/module.h:9,
                 from drivers/ata/pata_cs5536.c:33:
arch/x86/include/asm/paravirt.h:146:1: warning: this is the location of the previous definition
drivers/ata/pata_cs5536.c:48:1: warning: "wrmsr" redefined
arch/x86/include/asm/paravirt.h:154:1: warning: this is the location of the previous definition
Reported-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
      ff5dd32b
  13. 25 12月, 2010 5 次提交
    • T
      libata: issue DIPM enable commands with LPM state updated · e5005b15
      由 Tejun Heo 提交于 
      Low level drivers may behave differently depending on the current
link->lpm_policy.  During ata_eh_set_lpm(), DIPM enable commands are
issued after the successful completion of ap->ops->set_lpm(), which
means that the controller is already in the target state.  This causes
DIPM enable commands to be processed with mismatching controller power
state and link->lpm_policy value.

In ahci, link->lpm_policy is used to ignore certain PHY events if LPM
is enabled; however, as DIPM commands are issued with stale
link->lpm_policy, they sometimes end up triggering these conditions
and get aborted leading to LPM configuration failure.

Fix it by updating link->lpm_policy before issuing DIPM enable
commands.
Signed-off-by: NTejun Heo <tj@kernel.org>
Reported-by: NKyle McMartin <kyle@mcmartin.ca>
Cc: stable@kernel.org
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
      e5005b15
    • T
      libata: no special completion processing for EH commands · f08dc1ac
      由 Tejun Heo 提交于 
      ata_qc_complete() contains special handling for certain commands.  For
example, it schedules EH for device revalidation after certain
configurations are changed.  These shouldn't be applied to EH
commands but they were.

In most cases, it doesn't cause an actual problem because EH doesn't
issue any command which would trigger special handling; however, ACPI
can issue such commands via _GTF which can cause weird interactions.

Restructure ata_qc_complete() such that EH commands are always passed
on to __ata_qc_complete().

stable: Please apply to -stable only after 2.6.38 is released.
Signed-off-by: NTejun Heo <tj@kernel.org>
Reported-by: NKyle McMartin <kyle@mcmartin.ca>
Cc: stable@kernel.org
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
      f08dc1ac
    • W
      pata_mpc52xx: driver needs BMDMA · 869934ad
      由 Wolfram Sang 提交于 
      Found by this build-error if BMDMA is disabled:

drivers/ata/pata_mpc52xx.c: In function 'mpc52xx_ata_init_one':
drivers/ata/pata_mpc52xx.c:662: error: 'ata_bmdma_interrupt' undeclared (first use in this function)
...

Move the Kconfig entry to the proper location as needed since
9a7780c9 (libata-sff: make BMDMA optional)
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
      869934ad
    • W
      pata_cs5536: Add support for non-X86_32 platforms · 9272dcc2
      由 Wu Zhangjin 提交于 
      pata_cs5536 does work on the other platforms(e.g. Loongson, a MIPS
variant), so, remove the dependency of X86_32 and fix the building
errors under the other platforms via only reserving the X86_32 specific
parts for X86_32.

pata_amd also supports cs5536 IDE controller, but this one saves about
33k for the compressed kernel image(vmlinuz for MIPS).
Signed-off-by: NZhang Le <r0bertz@gentoo.org>
Signed-off-by: NChen Jie <chenj@lemote.com>
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
      9272dcc2
    • T
      libata-sff: fix HSM_ST_ERR handling in __ata_sff_port_intr() · 687a9933
      由 Tejun Heo 提交于 
      While separating out BMDMA irq handler from SFF, commit c3b28894
(libata-sff: separate out BMDMA irq handler) incorrectly made
__ata_sff_port_intr() consider an IRQ to be an idle one if the host
state was transitioned to HSM_ST_ERR by ata_bmdma_port_intr().

This makes BMDMA drivers ignore IRQs reporting host bus error which
leads to timeouts instead of triggering EH immediately.  Fix it by
making __ata_sff_port_intr() consider the IRQ to be an idle one iff
the state is HSM_ST_IDLE.  This is equivalent to adding HSM_ST_ERR to
the "break"ing case but less error-prone.
Signed-off-by: NTejun Heo <tj@kernel.org>
Reported-by: NAntonio Toma <antonio.toma@gmail.com>
Cc: stable@kernel.org
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
      687a9933
  15. 15 12月, 2010 1 次提交
    • T
      workqueue: convert cancel_rearming_delayed_work[queue]() users to cancel_delayed_work_sync() · afe2c511
      由 Tejun Heo 提交于 
      cancel_rearming_delayed_work[queue]() has been superceded by
cancel_delayed_work_sync() quite some time ago.  Convert all the
in-kernel users.  The conversions are completely equivalent and
trivial.
Signed-off-by: NTejun Heo <tj@kernel.org>
Acked-by: N"David S. Miller" <davem@davemloft.net>
Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
Acked-by: NEvgeniy Polyakov <zbr@ioremap.net>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: netdev@vger.kernel.org
Cc: Anton Vorontsov <cbou@mail.ru>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Neil Brown <neilb@suse.de>
Cc: Alex Elder <aelder@sgi.com>
Cc: xfs-masters@oss.sgi.com
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: netfilter-devel@vger.kernel.org
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: linux-nfs@vger.kernel.org
      afe2c511
  17. 20 11月, 2010 1 次提交
  19. 18 11月, 2010 1 次提交
  21. 17 11月, 2010 1 次提交
    • J
      SCSI host lock push-down · f281233d
      由 Jeff Garzik 提交于 
      Move the mid-layer's ->queuecommand() invocation from being locked
with the host lock to being unlocked to facilitate speeding up the
critical path for drivers who don't need this lock taken anyway.

The patch below presents a simple SCSI host lock push-down as an
equivalent transformation.  No locking or other behavior should change
with this patch.  All existing bugs and locking orders are preserved.

Additionally, add one parameter to queuecommand,
	struct Scsi_Host *
and remove one parameter from queuecommand,
	void (*done)(struct scsi_cmnd *)

Scsi_Host* is a convenient pointer that most host drivers need anyway,
and 'done' is redundant to struct scsi_cmnd->scsi_done.

Minimal code disturbance was attempted with this change.  Most drivers
needed only two one-line modifications for their host lock push-down.
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
Acked-by: NJames Bottomley <James.Bottomley@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      f281233d
  23. 13 11月, 2010 3 次提交
  25. 02 11月, 2010 1 次提交
  27. 30 10月, 2010 1 次提交
  29. 22 10月, 2010 4 次提交