ide: add IDE_HFLAG_NO_DSC host flag

* Add IDE_HFLAG_NO_DSC host flag for hosts that doesn't support DSC overlap.

* Set it in aec62xx (for ATP850UF only) and hpt34x host drivers.

* Convert ide-tape device driver to check for IDE_HFLAG_NO_DSC flag.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 4 insertions, 12 deletions

diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 65037a8295a1..73e41cff3738 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -4532,19 +4532,11 @@ static void idetape_setup (ide_drive_t *drive, idetape_tape_t *tape, int minor)
 
         spin_lock_init(&tape->spinlock);
         drive->dsc_overlap = 1;
-#ifdef CONFIG_BLK_DEV_IDEPCI
-        if (HWIF(drive)->pci_dev != NULL) {
-                /*
-                 * These two ide-pci host adapters appear to need DSC overlap disabled.
-                 * This probably needs further analysis.
-                 */
-                if ((HWIF(drive)->pci_dev->device == PCI_DEVICE_ID_ARTOP_ATP850UF) ||
-                    (HWIF(drive)->pci_dev->device == PCI_DEVICE_ID_TTI_HPT343)) {
-                        printk(KERN_INFO "ide-tape: %s: disabling DSC overlap\n", tape->name);
-                        drive->dsc_overlap = 0;
-                }
+        if (drive->hwif->host_flags & IDE_HFLAG_NO_DSC) {
+                printk(KERN_INFO "ide-tape: %s: disabling DSC overlap\n",
+                                 tape->name);
+                drive->dsc_overlap = 0;
         }
-#endif /* CONFIG_BLK_DEV_IDEPCI */
         /* Seagate Travan drives do not support DSC overlap. */
         if (strstr(drive->id->model, "Seagate STT3401"))
                 drive->dsc_overlap = 0;