On Tuesday 02 October 2007, Jeff Garzik wrote: > Bartlomiej Zolnierkiewicz wrote: > > On Monday 01 October 2007, Jeff Garzik wrote: > >> Bartlomiej Zolnierkiewicz wrote: > >>> * Convert cmd64x, hpt366 and pdc202xx_old host drivers to use > >>> pci_resource_start(hwif->pci_dev, 4) instead of hwif->dma_master. > >> Before using pci_resource_start(), the code should check > >> pci_resource_len() to ensure it is the appropriate size. > >> > >> It would be very wise to ensure that pci_resource_flags()&IORESOURCE_IO > >> is true, too. > > > > Sure but since the old code hasn't been doing these checks (old code > > just did pci_resource_start() -> hwif->dma_base -> hwif->dma_master) > > this is a separate issue from what the patch tries to achieve. > > Nonetheless this is duplicating an existing bug $N times... not ideal :) The existing bug is that the methods converted to use pci_resource_start() may be set in hwif instance and used even if the BAR4 is invalid. Therefore the above patch is correct and it isn't duplicating the existing bug. :) However I agree that all these pci_resource_start()s could be a bit confusing so here is 'take 2'. [PATCH] ide: remove ->dma_master field from ide_hwif_t (take 2) * Convert cmd64x, hpt366 and pdc202xx_old host drivers to use pci_resource_start(hwif->pci_dev, 4) instead of hwif->dma_master. * Remove no longer needed ->dma_master field from ide_hwif_t. v2: * Use the more readable 'hwif->dma_base - (hwif->channel * 8)' instead of pci_resource_start(hwif->pci_dev, 4). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx> --- drivers/ide/ide-dma.c | 7 ------- drivers/ide/ide.c | 2 -- drivers/ide/pci/cmd64x.c | 8 +++++--- drivers/ide/pci/hpt366.c | 21 +++++++++++---------- drivers/ide/pci/pdc202xx_old.c | 12 ++++++------ include/linux/ide.h | 1 - 6 files changed, 22 insertions(+), 29 deletions(-) Index: b/drivers/ide/ide-dma.c =================================================================== --- a/drivers/ide/ide-dma.c +++ b/drivers/ide/ide-dma.c @@ -1006,11 +1006,6 @@ void ide_setup_dma(ide_hwif_t *hwif, uns 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)) @@ -1052,8 +1047,6 @@ void ide_setup_dma(ide_hwif_t *hwif, uns hwif->drives[1].name, (dma_stat & 0x40) ? "DMA" : "pio"); } printk("\n"); - - BUG_ON(!hwif->dma_master); } EXPORT_SYMBOL_GPL(ide_setup_dma); Index: b/drivers/ide/ide.c =================================================================== --- a/drivers/ide/ide.c +++ b/drivers/ide/ide.c @@ -470,7 +470,6 @@ static void ide_hwif_restore(ide_hwif_t #endif hwif->dma_base = tmp_hwif->dma_base; - hwif->dma_master = tmp_hwif->dma_master; hwif->dma_command = tmp_hwif->dma_command; hwif->dma_vendor1 = tmp_hwif->dma_vendor1; hwif->dma_status = tmp_hwif->dma_status; @@ -604,7 +603,6 @@ void ide_unregister(unsigned int index) (void) ide_release_dma(hwif); hwif->dma_base = 0; - hwif->dma_master = 0; hwif->dma_command = 0; hwif->dma_vendor1 = 0; hwif->dma_status = 0; Index: b/drivers/ide/pci/cmd64x.c =================================================================== --- a/drivers/ide/pci/cmd64x.c +++ b/drivers/ide/pci/cmd64x.c @@ -333,13 +333,14 @@ static void cmd64x_set_dma_mode(ide_driv static int cmd648_ide_dma_end (ide_drive_t *drive) { ide_hwif_t *hwif = HWIF(drive); + unsigned long addr = hwif->dma_base - (hwif->channel * 8) + 0x01; int err = __ide_dma_end(drive); u8 irq_mask = hwif->channel ? MRDMODE_INTR_CH1 : MRDMODE_INTR_CH0; - u8 mrdmode = inb(hwif->dma_master + 0x01); + u8 mrdmode = inb(addr); /* clear the interrupt bit */ - outb(mrdmode | irq_mask, hwif->dma_master + 0x01); + outb(mrdmode | irq_mask, addr); return err; } @@ -364,10 +365,11 @@ static int cmd64x_ide_dma_end (ide_drive static int cmd648_ide_dma_test_irq (ide_drive_t *drive) { ide_hwif_t *hwif = HWIF(drive); + unsigned long addr = hwif->dma_base - (hwif->channel * 8) + 0x01; u8 irq_mask = hwif->channel ? MRDMODE_INTR_CH1 : MRDMODE_INTR_CH0; u8 dma_stat = inb(hwif->dma_status); - u8 mrdmode = inb(hwif->dma_master + 0x01); + u8 mrdmode = inb(addr); #ifdef DEBUG printk("%s: dma_stat: 0x%02x mrdmode: 0x%02x irq_mask: 0x%02x\n", Index: b/drivers/ide/pci/hpt366.c =================================================================== --- a/drivers/ide/pci/hpt366.c +++ b/drivers/ide/pci/hpt366.c @@ -845,32 +845,33 @@ static int hpt374_ide_dma_end(ide_drive_ static void hpt3xxn_set_clock(ide_hwif_t *hwif, u8 mode) { - u8 scr2 = inb(hwif->dma_master + 0x7b); + unsigned long addr = hwif->dma_base - (hwif->channel * 8); + u8 scr2 = inb(addr + 0x7b); if ((scr2 & 0x7f) == mode) return; /* Tristate the bus */ - outb(0x80, hwif->dma_master + 0x73); - outb(0x80, hwif->dma_master + 0x77); + outb(0x80, addr + 0x73); + outb(0x80, addr + 0x77); /* Switch clock and reset channels */ - outb(mode, hwif->dma_master + 0x7b); - outb(0xc0, hwif->dma_master + 0x79); + outb(mode, addr + 0x7b); + outb(0xc0, addr + 0x79); /* * Reset the state machines. * NOTE: avoid accidentally enabling the disabled channels. */ - outb(inb(hwif->dma_master + 0x70) | 0x32, hwif->dma_master + 0x70); - outb(inb(hwif->dma_master + 0x74) | 0x32, hwif->dma_master + 0x74); + outb(inb(addr + 0x70) | 0x32, addr + 0x70); + outb(inb(addr + 0x74) | 0x32, addr + 0x74); /* Complete reset */ - outb(0x00, hwif->dma_master + 0x79); + outb(0x00, addr + 0x79); /* Reconnect channels to bus */ - outb(0x00, hwif->dma_master + 0x73); - outb(0x00, hwif->dma_master + 0x77); + outb(0x00, addr + 0x73); + outb(0x00, addr + 0x77); } /** Index: b/drivers/ide/pci/pdc202xx_old.c =================================================================== --- a/drivers/ide/pci/pdc202xx_old.c +++ b/drivers/ide/pci/pdc202xx_old.c @@ -162,7 +162,7 @@ static u8 pdc202xx_old_cable_detect (ide */ static void pdc_old_enable_66MHz_clock(ide_hwif_t *hwif) { - unsigned long clock_reg = hwif->dma_master + 0x11; + unsigned long clock_reg = hwif->dma_base - (hwif->channel * 8) + 0x11; u8 clock = inb(clock_reg); outb(clock | (hwif->channel ? 0x08 : 0x02), clock_reg); @@ -170,7 +170,7 @@ static void pdc_old_enable_66MHz_clock(i static void pdc_old_disable_66MHz_clock(ide_hwif_t *hwif) { - unsigned long clock_reg = hwif->dma_master + 0x11; + unsigned long clock_reg = hwif->dma_base - (hwif->channel * 8) + 0x11; u8 clock = inb(clock_reg); outb(clock & ~(hwif->channel ? 0x08 : 0x02), clock_reg); @@ -193,7 +193,7 @@ static void pdc202xx_old_ide_dma_start(i if (drive->media != ide_disk || drive->addressing == 1) { struct request *rq = HWGROUP(drive)->rq; ide_hwif_t *hwif = HWIF(drive); - unsigned long high_16 = hwif->dma_master; + unsigned long high_16 = hwif->dma_base - (hwif->channel * 8); unsigned long atapi_reg = high_16 + (hwif->channel ? 0x24 : 0x20); u32 word_count = 0; u8 clock = inb(high_16 + 0x11); @@ -212,7 +212,7 @@ static int pdc202xx_old_ide_dma_end(ide_ { if (drive->media != ide_disk || drive->addressing == 1) { ide_hwif_t *hwif = HWIF(drive); - unsigned long high_16 = hwif->dma_master; + unsigned long high_16 = hwif->dma_base - (hwif->channel * 8); unsigned long atapi_reg = high_16 + (hwif->channel ? 0x24 : 0x20); u8 clock = 0; @@ -228,7 +228,7 @@ static int pdc202xx_old_ide_dma_end(ide_ static int pdc202xx_old_ide_dma_test_irq(ide_drive_t *drive) { ide_hwif_t *hwif = HWIF(drive); - unsigned long high_16 = hwif->dma_master; + unsigned long high_16 = hwif->dma_base - (hwif->channel * 8); u8 dma_stat = inb(hwif->dma_status); u8 sc1d = inb(high_16 + 0x001d); @@ -271,7 +271,7 @@ static void pdc202xx_dma_timeout(ide_dri static void pdc202xx_reset_host (ide_hwif_t *hwif) { - unsigned long high_16 = hwif->dma_master; + unsigned long high_16 = hwif->dma_base - (hwif->channel * 8); u8 udma_speed_flag = inb(high_16 | 0x001f); outb(udma_speed_flag | 0x10, high_16 | 0x001f); Index: b/include/linux/ide.h =================================================================== --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -764,7 +764,6 @@ typedef struct hwif_s { int rqsize; /* max sectors per request */ int irq; /* our irq number */ - unsigned long dma_master; /* reference base addr dmabase */ unsigned long dma_base; /* base addr for dma ports */ unsigned long dma_command; /* dma command register */ unsigned long dma_vendor1; /* dma vendor 1 register */ - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html