ide: IDE_HFLAG_SERIALIZE_DMA bugfix

Patch re-ordering could be harmful:

commit 1fd1890594bd355a4217f5658a34763e77decee3
Author: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date:   Sat Apr 26 22:25:24 2008 +0200

    ide: add IDE_HFLAG_SERIALIZE_DMA host flag
...

is buggy because ->init_dma method / ide_hwif_setup_dma() is called
before IDE_HFLAG_SERIALIZE_DMA host flag is checked.

Fix it by checking IDE_HFLAG_SERIALIZE[_DMA] after DMA initialization.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 591deda..34b0d4f 100644 (file)
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1355,12 +1355,6 @@ static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
        if (hwif->chipset != ide_dtc2278 || hwif->channel == 0)
                hwif->port_ops = d->port_ops;
 
-       if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
-           ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) {
-               if (hwif->mate)
-                       hwif->mate->serialized = hwif->serialized = 1;
-       }
-
        hwif->swdma_mask = d->swdma_mask;
        hwif->mwdma_mask = d->mwdma_mask;
        hwif->ultra_mask = d->udma_mask;
@@ -1382,6 +1376,12 @@ static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
                        hwif->dma_ops = d->dma_ops;
        }
 
+       if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
+           ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) {
+               if (hwif->mate)
+                       hwif->mate->serialized = hwif->serialized = 1;
+       }
+
        if (d->host_flags & IDE_HFLAG_RQSIZE_256)
                hwif->rqsize = 256;