diff options
Diffstat (limited to 'drivers/ata/pata_efar.c')
| -rw-r--r-- | drivers/ata/pata_efar.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/ata/pata_efar.c b/drivers/ata/pata_efar.c index 5556163c80de..1617421f7e76 100644 --- a/drivers/ata/pata_efar.c +++ b/drivers/ata/pata_efar.c @@ -68,6 +68,8 @@ static int efar_cable_detect(struct ata_port *ap) return ATA_CBL_PATA80; } +static DEFINE_SPINLOCK(efar_lock); + /** * efar_set_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring @@ -84,7 +86,9 @@ static void efar_set_piomode (struct ata_port *ap, struct ata_device *adev) unsigned int pio = adev->pio_mode - XFER_PIO_0; struct pci_dev *dev = to_pci_dev(ap->host->dev); unsigned int idetm_port= ap->port_no ? 0x42 : 0x40; + unsigned long flags; u16 idetm_data; + u8 udma_enable; int control = 0; /* @@ -107,6 +111,8 @@ static void efar_set_piomode (struct ata_port *ap, struct ata_device *adev) if (adev->class == ATA_DEV_ATA) control |= 4; /* PPE */ + spin_lock_irqsave(&efar_lock, flags); + pci_read_config_word(dev, idetm_port, &idetm_data); /* Set PPE, IE, and TIME as appropriate */ @@ -131,6 +137,11 @@ static void efar_set_piomode (struct ata_port *ap, struct ata_device *adev) idetm_data |= 0x4000; /* Ensure SITRE is set */ pci_write_config_word(dev, idetm_port, idetm_data); + + pci_read_config_byte(dev, 0x48, &udma_enable); + udma_enable &= ~(1 << (2 * ap->port_no + adev->devno)); + pci_write_config_byte(dev, 0x48, udma_enable); + spin_unlock_irqrestore(&efar_lock, flags); } /** @@ -151,6 +162,7 @@ static void efar_set_dmamode (struct ata_port *ap, struct ata_device *adev) u16 master_data; u8 speed = adev->dma_mode; int devid = adev->devno + 2 * ap->port_no; + unsigned long flags; u8 udma_enable; static const /* ISP RTC */ @@ -160,6 +172,8 @@ static void efar_set_dmamode (struct ata_port *ap, struct ata_device *adev) { 2, 1 }, { 2, 3 }, }; + spin_lock_irqsave(&efar_lock, flags); + pci_read_config_word(dev, master_port, &master_data); pci_read_config_byte(dev, 0x48, &udma_enable); @@ -217,6 +231,7 @@ static void efar_set_dmamode (struct ata_port *ap, struct ata_device *adev) pci_write_config_word(dev, master_port, master_data); } pci_write_config_byte(dev, 0x48, udma_enable); + spin_unlock_irqrestore(&efar_lock, flags); } static struct scsi_host_template efar_sht = { |