Eric Lee / smarc-fsl-linux-kernel

01 May, 2011

1 commit

17 Nov, 2010

1 commit

  • f281233d3   SCSI host lock push-down ... Browse Code »

    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: Jeff Garzik
    Acked-by: James Bottomley
    Signed-off-by: Linus Torvalds

    Jeff Garzik
     

02 Jun, 2010

1 commit

  • c2cdf6aba   powerpc/macio: Fix probing of macio devices by using the right of match table ... Browse Code »

    Grant patches added an of mach table to struct device_driver. However,
    while he changed the macio device code to use that, he left the match
    table pointer in struct macio_driver and didn't update drivers to use
    the "new" one, thus breaking the probing.

    This completes the change by moving all drivers to setup the "new"
    one, removing all traces of the old one, and while at it (since it
    changes the exact same locations), I also remove two other duplicates
    from struct driver which are the name and owner fields.

    Signed-off-by: Benjamin Herrenschmidt

    Benjamin Herrenschmidt
     

30 Mar, 2010

1 commit

  • 5a0e3ad6a   include cleanup: Update gfp.h and slab.h includes to prepare for breaking implic… ... Browse Code »

    …it slab.h inclusion from percpu.h

    percpu.h is included by sched.h and module.h and thus ends up being
    included when building most .c files. percpu.h includes slab.h which
    in turn includes gfp.h making everything defined by the two files
    universally available and complicating inclusion dependencies.

    percpu.h -> slab.h dependency is about to be removed. Prepare for
    this change by updating users of gfp and slab facilities include those
    headers directly instead of assuming availability. As this conversion
    needs to touch large number of source files, the following script is
    used as the basis of conversion.

    http://userweb.kernel.org/~tj/misc/slabh-sweep.py

    The script does the followings.

    * Scan files for gfp and slab usages and update includes such that
    only the necessary includes are there. ie. if only gfp is used,
    gfp.h, if slab is used, slab.h.

    * When the script inserts a new include, it looks at the include
    blocks and try to put the new include such that its order conforms
    to its surrounding. It's put in the include block which contains
    core kernel includes, in the same order that the rest are ordered -
    alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
    doesn't seem to be any matching order.

    * If the script can't find a place to put a new include (mostly
    because the file doesn't have fitting include block), it prints out
    an error message indicating which .h file needs to be added to the
    file.

    The conversion was done in the following steps.

    1. The initial automatic conversion of all .c files updated slightly
    over 4000 files, deleting around 700 includes and adding ~480 gfp.h
    and ~3000 slab.h inclusions. The script emitted errors for ~400
    files.

    2. Each error was manually checked. Some didn't need the inclusion,
    some needed manual addition while adding it to implementation .h or
    embedding .c file was more appropriate for others. This step added
    inclusions to around 150 files.

    3. The script was run again and the output was compared to the edits
    from #2 to make sure no file was left behind.

    4. Several build tests were done and a couple of problems were fixed.
    e.g. lib/decompress_*.c used malloc/free() wrappers around slab
    APIs requiring slab.h to be added manually.

    5. The script was run on all .h files but without automatically
    editing them as sprinkling gfp.h and slab.h inclusions around .h
    files could easily lead to inclusion dependency hell. Most gfp.h
    inclusion directives were ignored as stuff from gfp.h was usually
    wildly available and often used in preprocessor macros. Each
    slab.h inclusion directive was examined and added manually as
    necessary.

    6. percpu.h was updated not to include slab.h.

    7. Build test were done on the following configurations and failures
    were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
    distributed build env didn't work with gcov compiles) and a few
    more options had to be turned off depending on archs to make things
    build (like ipr on powerpc/64 which failed due to missing writeq).

    * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
    * powerpc and powerpc64 SMP allmodconfig
    * sparc and sparc64 SMP allmodconfig
    * ia64 SMP allmodconfig
    * s390 SMP allmodconfig
    * alpha SMP allmodconfig
    * um on x86_64 SMP allmodconfig

    8. percpu.h modifications were reverted so that it could be applied as
    a separate patch and serve as bisection point.

    Given the fact that I had only a couple of failures from tests on step
    6, I'm fairly confident about the coverage of this conversion patch.
    If there is a breakage, it's likely to be something in one of the arch
    headers which should be easily discoverable easily on most builds of
    the specific arch.

    Signed-off-by: Tejun Heo <tj@kernel.org>
    Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

    Tejun Heo
     

05 Jun, 2008

1 commit

24 Feb, 2008

1 commit

  • 3a2d5b700   PM: Introduce PM_EVENT_HIBERNATE callback state ... Browse Code »

    During the last step of hibernation in the "platform" mode (with the
    help of ACPI) we use the suspend code, including the devices'
    ->suspend() methods, to prepare the system for entering the ACPI S4
    system sleep state.

    But at least for some devices the operations performed by the
    ->suspend() callback in that case must be different from its operations
    during regular suspend.

    For this reason, introduce the new PM event type PM_EVENT_HIBERNATE and
    pass it to the device drivers' ->suspend() methods during the last phase
    of hibernation, so that they can distinguish this case and handle it as
    appropriate. Modify the drivers that handle PM_EVENT_SUSPEND in a
    special way and need to handle PM_EVENT_HIBERNATE in the same way.

    These changes are necessary to fix a hibernation regression related
    to the i915 driver (ref. http://lkml.org/lkml/2008/2/22/488).

    Signed-off-by: Rafael J. Wysocki
    Acked-by: Pavel Machek
    Tested-by: Jeff Chua
    Signed-off-by: Linus Torvalds

    Rafael J. Wysocki
     

31 Jan, 2008

1 commit

  • d3f46f39b   [SCSI] remove use_sg_chaining ... Browse Code »

    With the sg table code, every SCSI driver is now either chain capable
    or broken (or has sg_tablesize set so chaining is never activated), so
    there's no need to have a check in the host template.

    Also tidy up the code by moving the scatterlist size defines into the
    SCSI includes and permit the last entry of the scatterlist pools not
    to be a power of two.
    Signed-off-by: James Bottomley

    James Bottomley
     

16 Oct, 2007

1 commit

07 Jun, 2007

1 commit

09 May, 2007

2 commits

  • 6ec129c3a   Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 ... Browse Code »

    * master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (58 commits)
    [SCSI] zfcp: clear boxed flag on unit reopen.
    [SCSI] zfcp: clear adapter failed flag if an fsf request times out.
    [SCSI] zfcp: rework request ID management.
    [SCSI] zfcp: Fix deadlock between zfcp ERP and SCSI
    [SCSI] zfcp: Locking for req_no and req_seq_no
    [SCSI] zfcp: print S_ID and D_ID with 3 bytes
    [SCSI] ipr: Use PCI-E reset API for new ipr adapter
    [SCSI] qla2xxx: Update version number to 8.01.07-k7.
    [SCSI] qla2xxx: Add MSI support.
    [SCSI] qla2xxx: Correct pci_set_msi() usage semantics.
    [SCSI] qla2xxx: Attempt to stop firmware only if it had been previously executed.
    [SCSI] qla2xxx: Honor NVRAM port-down-retry-count settings.
    [SCSI] qla2xxx: Error-out during probe() if we're unable to complete HBA initialization.
    [SCSI] zfcp: Stop system after memory corruption
    [SCSI] mesh: cleanup variable usage in interrupt handler
    [SCSI] megaraid: replace yield() with cond_resched()
    [SCSI] megaraid: fix warnings when CONFIG_PROC_FS=n
    [SCSI] aacraid: correct SUN products to README
    [SCSI] aacraid: superfluous adapter reset for IBM 8 series ServeRAID controllers
    [SCSI] aacraid: kexec fix (reset interrupt handler)
    ...

    Linus Torvalds
     
  • 2135be5f2   [SCSI] mesh: cleanup variable usage in interrupt handler ... Browse Code »

    _ convert void* to struct mesh_state*

    - remove unused irq argument from mesh_interrupt()

    Signed-off-by: Olaf Hering
    Cc: James Bottomley
    Signed-off-by: Andrew Morton
    Signed-off-by: James Bottomley

    Olaf Hering
     

02 May, 2007

1 commit

07 Oct, 2006

1 commit

05 Oct, 2006

1 commit

  • 7d12e780e   IRQ: Maintain regs pointer globally rather than passing to IRQ handlers ... Browse Code »

    Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
    of passing regs around manually through all ~1800 interrupt handlers in the
    Linux kernel.

    The regs pointer is used in few places, but it potentially costs both stack
    space and code to pass it around. On the FRV arch, removing the regs parameter
    from all the genirq function results in a 20% speed up of the IRQ exit path
    (ie: from leaving timer_interrupt() to leaving do_IRQ()).

    Where appropriate, an arch may override the generic storage facility and do
    something different with the variable. On FRV, for instance, the address is
    maintained in GR28 at all times inside the kernel as part of general exception
    handling.

    Having looked over the code, it appears that the parameter may be handed down
    through up to twenty or so layers of functions. Consider a USB character
    device attached to a USB hub, attached to a USB controller that posts its
    interrupts through a cascaded auxiliary interrupt controller. A character
    device driver may want to pass regs to the sysrq handler through the input
    layer which adds another few layers of parameter passing.

    I've build this code with allyesconfig for x86_64 and i386. I've runtested the
    main part of the code on FRV and i386, though I can't test most of the drivers.
    I've also done partial conversion for powerpc and MIPS - these at least compile
    with minimal configurations.

    This will affect all archs. Mostly the changes should be relatively easy.
    Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

    struct pt_regs *old_regs = set_irq_regs(regs);

    And put the old one back at the end:

    set_irq_regs(old_regs);

    Don't pass regs through to generic_handle_irq() or __do_IRQ().

    In timer_interrupt(), this sort of change will be necessary:

    - update_process_times(user_mode(regs));
    - profile_tick(CPU_PROFILING, regs);
    + update_process_times(user_mode(get_irq_regs()));
    + profile_tick(CPU_PROFILING);

    I'd like to move update_process_times()'s use of get_irq_regs() into itself,
    except that i386, alone of the archs, uses something other than user_mode().

    Some notes on the interrupt handling in the drivers:

    (*) input_dev() is now gone entirely. The regs pointer is no longer stored in
    the input_dev struct.

    (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
    something different depending on whether it's been supplied with a regs
    pointer or not.

    (*) Various IRQ handler function pointers have been moved to type
    irq_handler_t.

    Signed-Off-By: David Howells
    (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)

    David Howells
     

26 Sep, 2006

1 commit

  • 8b4b8a24e   fix broken/dubious driver suspend() methods ... Browse Code »

    Small driver suspend() fixes in preparation for the PRETHAW events:

    - Only compare message events for equality against PM_EVENT_* codes;
    not against integers, or using greater/less-than comparisons.
    (PM_EVENT_* should really become a __bitwise thing.)

    - Explicitly test for SUSPEND events (rather than not-something-else)
    before suspending devices.

    - Removes more of the confusion between a pm_message_t (wraps event code)
    and a "state" ... suspend() originally took a target system state.

    These updates are correct and appropriate even without new PM_EVENT codes.

    benh: "I think in the Mesh case, we should handle the freeze case as well or
    we might get wild DMA."

    Signed-off-by: David Brownell
    Acked-by: Pavel Machek
    Cc: Greg KH
    Cc: Paul Mackerras
    Acked-by: Benjamin Herrenschmidt
    Cc: Mauro Carvalho Chehab
    Cc: James Bottomley
    Signed-off-by: Andrew Morton
    Signed-off-by: Greg Kroah-Hartman

    David Brownell
     

01 Aug, 2006

1 commit

31 Jul, 2006

1 commit

14 Jul, 2006

1 commit

01 Jul, 2006

1 commit

28 Mar, 2006

1 commit

  • e8222502e   [PATCH] powerpc: Kill _machine and hard-coded platform numbers ... Browse Code »

    This removes statically assigned platform numbers and reworks the
    powerpc platform probe code to use a better mechanism. With this,
    board support files can simply declare a new machine type with a
    macro, and implement a probe() function that uses the flattened
    device-tree to detect if they apply for a given machine.

    We now have a machine_is() macro that replaces the comparisons of
    _machine with the various PLATFORM_* constants. This commit also
    changes various drivers to use the new macro instead of looking at
    _machine.

    Signed-off-by: Benjamin Herrenschmidt
    Signed-off-by: Paul Mackerras

    Benjamin Herrenschmidt
     

09 Jan, 2006

1 commit

  • cc5d0189b   [PATCH] powerpc: Remove device_node addrs/n_addr ... Browse Code »

    The pre-parsed addrs/n_addrs fields in struct device_node are finally
    gone. Remove the dodgy heuristics that did that parsing at boot and
    remove the fields themselves since we now have a good replacement with
    the new OF parsing code. This patch also fixes a bunch of drivers to use
    the new code instead, so that at least pmac32, pseries, iseries and g5
    defconfigs build.

    Signed-off-by: Benjamin Herrenschmidt
    Signed-off-by: Paul Mackerras

    Benjamin Herrenschmidt
     

31 Oct, 2005

1 commit

23 Sep, 2005

1 commit

  • 0cdc82ee1   [PATCH] mesh scsi: fix error handling ... Browse Code »

    The PowerMac mesh SCSI driver had some missing error handling which would
    trigger warnings due to lack of handling of return value from
    scsi_add_host. This fixes it.

    Signed-off-by: Benjamin Herrenschmidt
    Cc: James Bottomley
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Benjamin Herrenschmidt
     

05 Sep, 2005

1 commit

  • ca078bae8   [PATCH] swsusp: switch pm_message_t to struct ... Browse Code »

    This adds type-checking to pm_message_t, so that people can't confuse it
    with int or u32. It also allows us to fix "disk yoyo" during suspend (disk
    spinning down/up/down).

    [We've tried that before; since that cpufreq problems were fixed and I've
    tried make allyes config and fixed resulting damage.]

    Signed-off-by: Pavel Machek
    Signed-off-by: Alexander Nyberg
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Pavel Machek
     

07 Jul, 2005

1 commit

  • 5e6557722   [PATCH] openfirmware: generate device table for userspace ... Browse Code »

    This converts the usage of struct of_match to struct of_device_id,
    similar to pci_device_id. This allows a device table to be generated,
    which can be parsed by depmod(8) to generate a map file for module
    loading.

    In order for hotplug to work with macio devices, patches to
    module-init-tools and hotplug must be applied. Those patches are
    available at:

    ftp://ftp.suse.com/pub/people/jeffm/linux/macio-hotplug/

    Signed-off-by: Jeff Mahoney
    Signed-off-by: Linus Torvalds

    Jeff Mahoney
     

18 Jun, 2005

1 commit

17 Apr, 2005

2 commits

  • e5378ca8c   [PATCH] fix u32 vs. pm_message_t in drivers/mmc,mtd,scsi ... Browse Code »

    This fixes u32 vs. pm_message_t in drivers/mmc, drivers/mtd and
    drivers/scsi.

    Signed-off-by: Pavel Machek
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Pavel Machek
     
  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    Initial git repository build. I'm not bothering with the full history,
    even though we have it. We can create a separate "historical" git
    archive of that later if we want to, and in the meantime it's about
    3.2GB when imported into git - space that would just make the early
    git days unnecessarily complicated, when we don't have a lot of good
    infrastructure for it.

    Let it rip!

    Linus Torvalds