Eric Lee / smarc-fsl-linux-kernel

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
     

03 May, 2010

1 commit

20 Oct, 2007

1 commit

16 Feb, 2007

1 commit

  • a5d8421b2   [SCSI] wd33c93: Fast SCSI with WD33C93B ... Browse Code »

    Attached are patches, which help to utilize more of the WD33C93B SCSI
    controller's capabilities.

    1) Added/changed all the necessary code to enable Burst Mode DMA. Only
    Single Byte DMA was used before.

    2) Added/changed all the necessary code to enable Fast-10 SCSI transfers.

    3) The original driver inadvertently used a transfer period of 1000-800ns
    (the lowest possible transfer rate) for asynchronous data transfers,
    instead of the (configurable) default period intended for this purpose,
    if the target responded to a SDTR not with a Reject-message, but with
    a zero-SDTR. This issue was fixed.
    Moreover, in case of a Reject the driver used the default-period's
    initialization-value instead of its (maybe smaller) current value. The
    missing assignment was added.

    4) The driver's commandline- and proc-file-interface was augmented to
    handle the new options properly.

    The WD33C93 manual, found at
    http://www.datasheet.in/datasheet-html/W/D/3/WD33C93B_WesternDigital.pdf.html,
    was very helpful.

    Signed-off-by: peter fuerst
    Signed-off-by: James Bottomley

    peter fuerst
     

01 Jul, 2006

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