Maximum supported UDMA mode for AEC6280[R] is UDMA5 (not UDMA4)
and for AEC6880[R] it is UDMA6 (not UDMA5):

* Fix the problem by adding missing struct ata_port_info to artop_init_one().

* Use the right naming (s/626/628/).

* Bump driver version.

Fixes IDE->libata regression, problem was never present in IDE aec62xx driver.

Cc: Alan Cox <[EMAIL PROTECTED]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[EMAIL PROTECTED]>
---
 drivers/ata/pata_artop.c |   19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

Index: b/drivers/ata/pata_artop.c
===================================================================
--- a/drivers/ata/pata_artop.c
+++ b/drivers/ata/pata_artop.c
@@ -2,6 +2,7 @@
  *    pata_artop.c - ARTOP ATA controller driver
  *
  *     (C) 2006 Red Hat <[EMAIL PROTECTED]>
+ *     (C) 2007 Bartlomiej Zolnierkiewicz
  *
  *    Based in part on drivers/ide/pci/aec62xx.c
  *     Copyright (C) 1999-2002 Andre Hedrick <[EMAIL PROTECTED]>
@@ -28,7 +29,7 @@
 #include <linux/ata.h>
 
 #define DRV_NAME       "pata_artop"
-#define DRV_VERSION    "0.4.3"
+#define DRV_VERSION    "0.4.4"
 
 /*
  *     The ARTOP has 33 Mhz and "over clocked" timing tables. Until we
@@ -430,7 +431,7 @@ static int artop_init_one (struct pci_de
                .udma_mask      = ATA_UDMA4,
                .port_ops       = &artop6260_ops,
        };
-       static const struct ata_port_info info_626x_fast = {
+       static const struct ata_port_info info_628x = {
                .sht            = &artop_sht,
                .flags          = ATA_FLAG_SLAVE_POSS,
                .pio_mask       = 0x1f, /* pio0-4 */
@@ -438,6 +439,14 @@ static int artop_init_one (struct pci_de
                .udma_mask      = ATA_UDMA5,
                .port_ops       = &artop6260_ops,
        };
+       static const struct ata_port_info info_628x_fast = {
+               .sht            = &artop_sht,
+               .flags          = ATA_FLAG_SLAVE_POSS,
+               .pio_mask       = 0x1f, /* pio0-4 */
+               .mwdma_mask     = 0x07, /* mwdma0-2 */
+               .udma_mask      = ATA_UDMA6,
+               .port_ops       = &artop6260_ops,
+       };
        const struct ata_port_info *ppi[] = { NULL, NULL };
 
        if (!printed_version++)
@@ -455,13 +464,13 @@ static int artop_init_one (struct pci_de
        }
        else if (id->driver_data == 1)  /* 6260 */
                ppi[0] = &info_626x;
-       else if (id->driver_data == 2)  { /* 6260 or 6260 + fast */
+       else if (id->driver_data == 2)  { /* 6280 or 6280 + fast */
                unsigned long io = pci_resource_start(pdev, 4);
                u8 reg;
 
-               ppi[0] = &info_626x;
+               ppi[0] = &info_628x;
                if (inb(io) & 0x10)
-                       ppi[0] = &info_626x_fast;
+                       ppi[0] = &info_628x_fast;
                /* Mac systems come up with some registers not set as we
                   will need them */
 
-
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