diff options
| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2007-05-05 22:03:49 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-05-05 22:03:49 +0200 |
| commit | e51e2528d589c13f0e51dfa671c310021d003e21 (patch) | |
| tree | 14eccc665d5e810840a88213392f09a2faf4e42f /drivers | |
| parent | 60e7a82f1acb76af05d81e93ca0f65fdd52c23c2 (diff) | |
| download | lwn-e51e2528d589c13f0e51dfa671c310021d003e21.tar.gz lwn-e51e2528d589c13f0e51dfa671c310021d003e21.zip | |
cmd64x: interrupt status fixes (take 2)
The driver's ide_dma_test_irq() method was reading the MRDMODE register even on
PCI0643/6 where it was write-only -- fix this by always reading the "backward-
compatible" interrupt bits, renaming dma_alt_stat to irq_stat as the interrupt
status bits are not coupled to DMA.
In addition, wrong interrupt bit was tested/cleared for the primary channel --
it's bit 2 in all the chip specs and the driver used bit 1... :-/
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ide/pci/cmd64x.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/drivers/ide/pci/cmd64x.c b/drivers/ide/pci/cmd64x.c index 336d02f58010..f165bf1c06dc 100644 --- a/drivers/ide/pci/cmd64x.c +++ b/drivers/ide/pci/cmd64x.c @@ -1,5 +1,5 @@ /* - * linux/drivers/ide/pci/cmd64x.c Version 1.43 Mar 10, 2007 + * linux/drivers/ide/pci/cmd64x.c Version 1.44 Mar 12, 2007 * * cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines. * Due to massive hardware bugs, UltraDMA is only supported @@ -36,7 +36,7 @@ * CMD64x specific registers definition. */ #define CFR 0x50 -#define CFR_INTR_CH0 0x02 +#define CFR_INTR_CH0 0x04 #define CNTRL 0x51 #define CNTRL_DIS_RA0 0x40 #define CNTRL_DIS_RA1 0x80 @@ -488,19 +488,19 @@ static int cmd64x_ide_dma_end (ide_drive_t *drive) static int cmd64x_ide_dma_test_irq (ide_drive_t *drive) { - ide_hwif_t *hwif = HWIF(drive); - struct pci_dev *dev = hwif->pci_dev; - u8 dma_alt_stat = 0, mask = (hwif->channel) ? MRDMODE_INTR_CH1 : - MRDMODE_INTR_CH0; - u8 dma_stat = inb(hwif->dma_status); + ide_hwif_t *hwif = HWIF(drive); + struct pci_dev *dev = hwif->pci_dev; + u8 irq_reg = hwif->channel ? ARTTIM23 : CFR; + u8 irq_stat = 0, mask = hwif->channel ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0; + u8 dma_stat = inb(hwif->dma_status); + + (void) pci_read_config_byte(dev, irq_reg, &irq_stat); - (void) pci_read_config_byte(dev, MRDMODE, &dma_alt_stat); #ifdef DEBUG - printk("%s: dma_stat: 0x%02x dma_alt_stat: " - "0x%02x mask: 0x%02x\n", drive->name, - dma_stat, dma_alt_stat, mask); + printk("%s: dma_stat: 0x%02x irq_stat: 0x%02x mask: 0x%02x\n", + drive->name, dma_stat, irq_stat, mask); #endif - if (!(dma_alt_stat & mask)) + if (!(irq_stat & mask)) return 0; /* return 1 if INTR asserted */ |