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pdc202xx_old: add missing ->dma_base check

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If ->dma_base is not set (== PCI BAR4 cannot be reserved) then DMA hooks
shouldn't be initialized or bad things will happen.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-08-20 22:42:56 +02:00
parent 01cc643ae3
commit e98d6e50be
1 changed files with 6 additions and 3 deletions
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9
drivers/ide/pci/pdc202xx_old.c
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@ -1,5 +1,5 @@
/*
* linux/drivers/ide/pci/pdc202xx_old.c Version 0.50 Mar 3, 2007
* linux/drivers/ide/pci/pdc202xx_old.c Version 0.51 Jul 27, 2007
*
* Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>
* Copyright (C) 2006-2007 MontaVista Software, Inc.
@ -337,15 +337,18 @@ static void __devinit init_hwif_pdc202xx(ide_hwif_t *hwif)
hwif->speedproc = &pdc202xx_tune_chipset;
hwif->err_stops_fifo = 1;
hwif->drives[0].autotune = hwif->drives[1].autotune = 1;
if (hwif->dma_base == 0)
return;
hwif->ultra_mask = hwif->cds->udma_mask;
hwif->mwdma_mask = 0x07;
hwif->swdma_mask = 0x07;
hwif->atapi_dma = 1;
hwif->err_stops_fifo = 1;
hwif->ide_dma_check = &pdc202xx_config_drive_xfer_rate;
hwif->dma_lost_irq = &pdc202xx_dma_lost_irq;
hwif->dma_timeout = &pdc202xx_dma_timeout;