ide: add ->max_sectors field to struct ide_port_info

* Add ->max_sectors field to struct ide_port_info to allow host drivers
  to specify value used for hwif->rqsize (if smaller than the default).

* Convert pdc202xx_old to use ->max_sectors and remove no longer needed
  IDE_HFLAG_RQSIZE_256 flag.

There should be no functional changes caused by this patch.

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

1 files changed, 3 insertions, 2 deletions

diff --git a/include/linux/ide.h b/include/linux/ide.h
index fc1a966c7b7d..2574dda4a3e7 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1372,8 +1372,6 @@ enum {
         IDE_HFLAG_LEGACY_IRQS           = (1 << 21),
         /* force use of legacy IRQs */
         IDE_HFLAG_FORCE_LEGACY_IRQS     = (1 << 22),
-        /* limit LBA48 requests to 256 sectors */
-        IDE_HFLAG_RQSIZE_256            = (1 << 23),
         /* use 32-bit I/O ops */
         IDE_HFLAG_IO_32BIT              = (1 << 24),
         /* unmask IRQs */
@@ -1411,6 +1409,9 @@ struct ide_port_info {
 
         ide_pci_enablebit_t     enablebits[2];
         hwif_chipset_t          chipset;
+
+        u16                     max_sectors;    /* if < than the default one */
+
         u32                     host_flags;
         u8                      pio_mask;
         u8                      swdma_mask;