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ide: PCI BMDMA initialization fixes (take 2) 

* Set hwif->dma_base only if allocation of extra ports succeeds.

While at it:

* Move setting of hwif->dma_{base,master} from ide_{mapped_mmio,iomio}_dma()
  to ide_setup_dma().

* Rename 'dma_base' argument to 'base' in ide_setup_dma() (to make the code
  obey 80-columns limit and increase its readability).

* Remove stale ide_setup_dma() comment.

v2:
* Change to allocate hwif->dmatable_cpu before reserving I/O ports missed
  teardown code (spotted by Sergei).  On the second thought this change is
  actually unnecessary so revert it in v2.

* Make ide_release_dma_engine() void and remove needless comment.

Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-10-20 00:32:37 +02:00
parent 52c8136137
commit a02bfd3ce9
1 changed files with 10 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/ide/ide-dma.c
View File

@ -901,10 +901,7 @@ void ide_dma_timeout (ide_drive_t *drive)
EXPORT_SYMBOL(ide_dma_timeout);
/*
* Needed for allowing full modular support of ide-driver
*/
static int ide_release_dma_engine(ide_hwif_t *hwif)
static void ide_release_dma_engine(ide_hwif_t *hwif)
{
if (hwif->dmatable_cpu) {
pci_free_consistent(hwif->pci_dev,
@ -913,7 +910,6 @@ static int ide_release_dma_engine(ide_hwif_t *hwif)
hwif->dmatable_dma);
hwif->dmatable_cpu = NULL;
}
return 1;
}
static int ide_release_iomio_dma(ide_hwif_t *hwif)
@ -956,12 +952,6 @@ static int ide_mapped_mmio_dma(ide_hwif_t *hwif, unsigned long base, unsigned in
{
printk(KERN_INFO " %s: MMIO-DMA ", hwif->name);
hwif->dma_base = base;
if(hwif->mate)
hwif->dma_master = (hwif->channel) ? hwif->mate->dma_base : base;
else
hwif->dma_master = base;
return 0;
}
@ -975,8 +965,6 @@ static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base, unsigned int port
return 1;
}
hwif->dma_base = base;
if (hwif->cds->extra) {
hwif->extra_base = base + (hwif->channel ? 8 : 16);
@ -991,10 +979,6 @@ static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base, unsigned int port
}
}
if(hwif->mate)
hwif->dma_master = (hwif->channel) ? hwif->mate->dma_base:base;
else
hwif->dma_master = base;
return 0;
}
@ -1006,12 +990,9 @@ static int ide_dma_iobase(ide_hwif_t *hwif, unsigned long base, unsigned int por
return ide_iomio_dma(hwif, base, ports);
}
/*
* This can be called for a dynamically installed interface. Don't __init it
*/
void ide_setup_dma (ide_hwif_t *hwif, unsigned long dma_base, unsigned int num_ports)
void ide_setup_dma(ide_hwif_t *hwif, unsigned long base, unsigned num_ports)
{
if (ide_dma_iobase(hwif, dma_base, num_ports))
if (ide_dma_iobase(hwif, base, num_ports))
return;
if (ide_allocate_dma_engine(hwif)) {
@ -1019,6 +1000,13 @@ void ide_setup_dma (ide_hwif_t *hwif, unsigned long dma_base, unsigned int num_p
return;
}
hwif->dma_base = base;
if (hwif->mate)
hwif->dma_master = hwif->channel ? hwif->mate->dma_base : base;
else
hwif->dma_master = base;
if (!(hwif->dma_command))
hwif->dma_command = hwif->dma_base;
if (!(hwif->dma_vendor1))