Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=df33c77e3981e71afc8727ee5c432ba1a1bba68c
Commit:     df33c77e3981e71afc8727ee5c432ba1a1bba68c
Parent:     908e0a8a265fe8057604a9a30aec3f0be7bb5ebb
Author:     Kristen Accardi <[EMAIL PROTECTED]>
AuthorDate: Fri Mar 9 18:15:33 2007 -0500
Committer:  Len Brown <[EMAIL PROTECTED]>
CommitDate: Fri Mar 9 18:15:33 2007 -0500

    libata-acpi: allow _GTF on SATA, but disable on PATA for now
    
    The ACPI specification states, and BIOS implementations depend on,
    _STM being called before _GTF.
    
    SATA does this, but PATA does not.  So for now, simply
    prevent execution of _GTF on PATA devices.  Longer term we
    should implement ACPI support for PATA devices in libata.
    
    Signed-off-by: Kristen Accardi <[EMAIL PROTECTED]>
    Signed-off-by: Len Brown <[EMAIL PROTECTED]>
---
 drivers/ata/libata-acpi.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index d14a48e..89aaf74 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -561,6 +561,13 @@ int ata_acpi_exec_tfs(struct ata_port *ap)
 
        if (noacpi)
                return 0;
+       /*
+        * TBD - implement PATA support.  For now,
+        * we should not run GTF on PATA devices since some
+        * PATA require execution of GTM/STM before GTF.
+        */
+       if (!(ap->cbl == ATA_CBL_SATA))
+               return 0;
 
        for (ix = 0; ix < ATA_MAX_DEVICES; ix++) {
                if (!ata_dev_enabled(&ap->device[ix]))
-
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