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| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2008-10-17 18:09:17 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-17 18:09:17 +0200 |
| commit | 107111d450541df8c2a8d3af1d538cc7cd85e81b (patch) | |
| tree | 4393f425b37ebbf7939ec4b0eb817402e53b7ff3 /drivers/ide/pci | |
| parent | sgiioc4: kill useless address checks (diff) | |
| download | linux-107111d450541df8c2a8d3af1d538cc7cd85e81b.tar.xz linux-107111d450541df8c2a8d3af1d538cc7cd85e81b.zip | |
sgiioc4: kill duplicate ioremap()
By the time ide_dma_sgiioc4() gets called, sgiioc4_ide_setup_pci_device() will
have called ioremap() on the whole BAR0 region, so calling ioremap() on the DMA
registers means wasting a page. Replace this call by a mere address calculation,
based on the fact that IRQ registers (pointed to by 'hwif->io_ports.irq_addr')
are situated at offset 0 from BAR0.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: jeremy@sgi.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/pci')
| -rw-r--r-- | drivers/ide/pci/sgiioc4.c | 14 |
1 files changed, 2 insertions, 12 deletions
diff --git a/drivers/ide/pci/sgiioc4.c b/drivers/ide/pci/sgiioc4.c index f6c5ba07be71..8af9b23499fd 100644 --- a/drivers/ide/pci/sgiioc4.c +++ b/drivers/ide/pci/sgiioc4.c @@ -320,7 +320,6 @@ ide_dma_sgiioc4(ide_hwif_t *hwif, const struct ide_port_info *d) { struct pci_dev *dev = to_pci_dev(hwif->dev); unsigned long dma_base = pci_resource_start(dev, 0) + IOC4_DMA_OFFSET; - void __iomem *virt_dma_base; int num_ports = sizeof (ioc4_dma_regs_t); void *pad; @@ -333,14 +332,8 @@ ide_dma_sgiioc4(ide_hwif_t *hwif, const struct ide_port_info *d) return -1; } - virt_dma_base = ioremap(dma_base, num_ports); - if (virt_dma_base == NULL) { - printk(KERN_ERR "%s(%s) -- ERROR: unable to map addresses " - "0x%lx to 0x%lx\n", __func__, hwif->name, - dma_base, dma_base + num_ports - 1); - goto dma_remap_failure; - } - hwif->dma_base = (unsigned long) virt_dma_base; + hwif->dma_base = (unsigned long)hwif->io_ports.irq_addr + + IOC4_DMA_OFFSET; hwif->sg_max_nents = IOC4_PRD_ENTRIES; @@ -364,9 +357,6 @@ ide_dma_sgiioc4(ide_hwif_t *hwif, const struct ide_port_info *d) printk(KERN_INFO "%s: changing from DMA to PIO mode", hwif->name); dma_pci_alloc_failure: - iounmap(virt_dma_base); - -dma_remap_failure: release_mem_region(dma_base, num_ports); return -1; |