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  1. 30 Oct, 2007 4 commits
    • Tejun Heo's avatar
      libata: stop being overjealous about non-IO commands · f90f0828
      Tejun Heo authored 
      libata EH always revalidated device and retried failed command after
error except for ATAPI CCs.  This is unnecessary and hinders with
users issuing direct commands.  This patch makes the following
changes.

* Make sata_sil24 not request ATA_EH_REVALIDATE on device errors.
  sil24 is the only driver which does this.  All others let libata EH
  core code decide.

* Don't request revalidation after device error of non-IO command.
  Revalidation doesn't really help anybody.  As ATA_EH_REVALIDATE
  isn't set by default, there's no reason to clear it after sense data
  is read.  Kill ATA_EH_REVALIDATE clearing code while at it.

* Don't retry non-IO command after device error.  Device has rejected
  the command.  There's no point in retrying.
Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      f90f0828
    • Tejun Heo's avatar
      libata: flush is an IO command · b666da35
      Tejun Heo authored 
      ATA_QCFLAG_IO is used to mark commands which are used to perform
regluar IO transfers via block layer.  These commands are assumed to
be valid and taken more seriously during error handling.  Cache flush
is used by regular IO path and necessary for data integrity.  Mark it
with ATA_QCFLAG_IO.
Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      b666da35
    • Mikael Pettersson's avatar
      sata_promise: cleanups · 5595ddf9
      Mikael Pettersson authored 
      Minor sata_promise cleanups:
- use C99 array initialisers in pdc_port_info[]
- add myself in the file head's Maintained by note,
  since users don't always read the MAINTAINERS file
- SG/PRD bug workaround warrants driver version bump
Signed-off-by: default avatarMikael Pettersson <mikpe@it.uu.se>
--
 drivers/ata/sata_promise.c |   17 +++++++++--------
 1 files changed, 9 insertions(+), 8 deletions(-)
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      5595ddf9
    • Mikael Pettersson's avatar
      sata_promise: ASIC PRD table bug workaround, take 2 · b9ccd4a9
      Mikael Pettersson authored 
      Second-generation Promise SATA controllers have an ASIC bug
which can trigger if the last PRD entry is larger than 164 bytes,
resulting in intermittent errors and possible data corruption.

Work around this by replacing calls to ata_qc_prep() with a
private version that fills the PRD, checks the size of the
last entry, and if necessary splits it to avoid the bug.
Also reduce sg_tablesize by 1 to accommodate the new entry.

Tested on the second-generation SATA300 TX4 and SATA300 TX2plus,
and the first-generation PDC20378.

Thanks to Alexander Sabourenkov for verifying the bug by
studying the vendor driver, and for writing the initial patch
upon which this one is based.
Signed-off-by: default avatarMikael Pettersson <mikpe@it.uu.se>
--
Changes since previous version:
* use new PDC_MAX_PRD constant to initialise sg_tablesize

 drivers/ata/sata_promise.c |   87 ++++++++++++++++++++++++++++++++++++++++++---
 1 files changed, 83 insertions(+), 4 deletions(-)
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      b9ccd4a9
  3. 29 Oct, 2007 36 commits