Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f273827e2aadcf2f74a7bdc9ad715a1b20ea7dda
Commit:     f273827e2aadcf2f74a7bdc9ad715a1b20ea7dda
Parent:     cb92441973ebd71d556fc7cdd9e597582327dd71
Author:     Mark Lord <[EMAIL PROTECTED]>
AuthorDate: Sat Jan 26 18:32:29 2008 -0500
Committer:  Jeff Garzik <[EMAIL PROTECTED]>
CommitDate: Fri Feb 1 11:29:47 2008 -0500

    sata_mv ncq Restrict max sectors to 8-bits on GenII NCQ
    
    The GenII chips have only 8-bits for the sector_count field when performing 
NCQ.
    Add a dev_config method to restrict this when necessary, taking care not to
    override any other restriction already in place (likely none, but someday.. 
?).
    
    Signed-off-by: Mark Lord <[EMAIL PROTECTED]>
    Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
---
 drivers/ata/sata_mv.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 207c400..d15caf3 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -449,6 +449,7 @@ static void mv_error_handler(struct ata_port *ap);
 static void mv_post_int_cmd(struct ata_queued_cmd *qc);
 static void mv_eh_freeze(struct ata_port *ap);
 static void mv_eh_thaw(struct ata_port *ap);
+static void mv6_dev_config(struct ata_device *dev);
 static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
 
 static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
@@ -541,6 +542,7 @@ static const struct ata_port_operations mv5_ops = {
 };
 
 static const struct ata_port_operations mv6_ops = {
+       .dev_config             = mv6_dev_config,
        .tf_load                = ata_tf_load,
        .tf_read                = ata_tf_read,
        .check_status           = ata_check_status,
@@ -1054,6 +1056,17 @@ static int mv_scr_write(struct ata_port *ap, unsigned 
int sc_reg_in, u32 val)
                return -EINVAL;
 }
 
+static void mv6_dev_config(struct ata_device *adev)
+{
+       /*
+        * We don't have hob_nsect when doing NCQ commands on Gen-II.
+        * See mv_qc_prep() for more info.
+        */
+       if (adev->flags & ATA_DFLAG_NCQ)
+               if (adev->max_sectors > ATA_MAX_SECTORS)
+                       adev->max_sectors = ATA_MAX_SECTORS;
+}
+
 static void mv_edma_cfg(struct mv_port_priv *pp, struct mv_host_priv *hpriv,
                        void __iomem *port_mmio, int want_ncq)
 {
-
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