Eric Lee / smarc-fsl-linux-kernel

24 Oct, 2008

1 commit

21 Jun, 2008

2 commits

20 Apr, 2008

1 commit

08 Apr, 2008

2 commits

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
     

23 Oct, 2007

1 commit

16 Oct, 2007

1 commit

31 May, 2007

1 commit

14 Apr, 2007

1 commit

  • 6e3b2bbb1   [SCSI] 3w-xxxx: fix oops caused by incorrect REQUEST_SENSE handling ... Browse Code »

    3w-xxxx emulates a REQUEST_SENSE response by simply returning nothing.
    Unfortunately, it's assuming that the REQUEST_SENSE command is
    implemented with use_sg == 0, which is no longer the case. The oops
    occurs because it's clearing the scatterlist in request_buffer instead
    of the memory region.

    This is fixed by using tw_transfer_internal() to transfer correctly to
    the scatterlist.

    Acked-by: adam radford
    Signed-off-by: James Bottomley

    James Bottomley
     

13 Feb, 2007

1 commit

  • 00977a59b   [PATCH] mark struct file_operations const 6 ... Browse Code »

    Many struct file_operations in the kernel can be "const". Marking them const
    moves these to the .rodata section, which avoids false sharing with potential
    dirty data. In addition it'll catch accidental writes at compile time to
    these shared resources.

    Signed-off-by: Arjan van de Ven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arjan van de Ven
     

06 Jan, 2007

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
     

27 Sep, 2006

1 commit

03 Jul, 2006

1 commit

10 Jun, 2006

1 commit

06 Jun, 2006

1 commit

  • 5d5ff44fe   [SCSI] fix up request buffer reference in various scsi drivers ... Browse Code »

    Various scsi drivers use scsi_cmnd.buffer and scsi_cmnd.bufflen in their
    queuecommand functions. Those fields are internal storage for the
    midlayer only and are used to restore the original payload after
    request_buffer and request_bufflen have been overwritten for EH. Using
    the buffer and bufflen fields means they do very broken things in error
    handling.

    Signed-off-by: Christoph Hellwig
    Signed-off-by: James Bottomley

    Christoph Hellwig
     

11 Apr, 2006

1 commit

  • 7551d9a20   [PATCH] 3ware: kmap_atomic() fix ... Browse Code »

    We must disable local IRQs while holding KM_IRQ0 or KM_IRQ1. Otherwise, an
    IRQ handler could use those kmap slots while this code is using them,
    resulting in memory corruption.

    Thanks to Nick Orlov for reporting.

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

    Andrew Morton
     

15 Jan, 2006

1 commit

  • a12e25bd5   [SCSI] sem2mutex 3w-[x9]xxx ... Browse Code »

    Convert a the 3w-9xxx.c and 3w-xxxx.c drivers to use mutexes instead
    of semaphores. Untested, but compiles and looks obviously correct.

    Signed-off-by: Jes Sorensen
    Signed-off-by: James Bottomley

    Jes Sorensen
     

29 Oct, 2005

1 commit

29 Aug, 2005

1 commit

  • c9d297c54   [SCSI] fix 3ware raid emulated commands ... Browse Code »

    The 3ware emulated commands all expect they are executing in the
    use_sg == 0 case, which isn't true either in the block layer rework or
    an SG_IO ioctl.

    Fix this by adding the correct kmapping of the first element in the sg
    list.

    Signed-off-by: James Bottomley

    James Bottomley
     

28 Jun, 2005

1 commit

18 Jun, 2005

1 commit

17 Apr, 2005

1 commit

  • 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