From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx> Subject: [PATCH] pata_rdc: parallel scanning needs an extra locking This is similar change as commit 60c3be3 ("ata_piix: parallel scanning on PATA needs an extra locking") for ata_piix host driver. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx> --- drivers/ata/pata_rdc.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) Index: b/drivers/ata/pata_rdc.c =================================================================== --- a/drivers/ata/pata_rdc.c +++ b/drivers/ata/pata_rdc.c @@ -86,6 +86,8 @@ static int rdc_pata_prereset(struct ata_ return ata_sff_prereset(link, deadline); } +static DEFINE_SPINLOCK(rdc_lock); + /** * rdc_set_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring @@ -101,6 +103,7 @@ static void rdc_set_piomode(struct ata_p { unsigned int pio = adev->pio_mode - XFER_PIO_0; struct pci_dev *dev = to_pci_dev(ap->host->dev); + unsigned long flags; unsigned int is_slave = (adev->devno != 0); unsigned int master_port= ap->port_no ? 0x42 : 0x40; unsigned int slave_port = 0x44; @@ -124,6 +127,8 @@ static void rdc_set_piomode(struct ata_p if (adev->class == ATA_DEV_ATA) control |= 4; /* PPE enable */ + spin_lock_irqsave(&rdc_lock, flags); + /* PIO configuration clears DTE unconditionally. It will be * programmed in set_dmamode which is guaranteed to be called * after set_piomode if any DMA mode is available. @@ -161,6 +166,8 @@ static void rdc_set_piomode(struct ata_p 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(&rdc_lock, flags); } /** @@ -177,6 +184,7 @@ static void rdc_set_piomode(struct ata_p static void rdc_set_dmamode(struct ata_port *ap, struct ata_device *adev) { struct pci_dev *dev = to_pci_dev(ap->host->dev); + unsigned long flags; u8 master_port = ap->port_no ? 0x42 : 0x40; u16 master_data; u8 speed = adev->dma_mode; @@ -190,6 +198,8 @@ static void rdc_set_dmamode(struct ata_p { 2, 1 }, { 2, 3 }, }; + spin_lock_irqsave(&rdc_lock, flags); + pci_read_config_word(dev, master_port, &master_data); pci_read_config_byte(dev, 0x48, &udma_enable); @@ -271,6 +281,8 @@ static void rdc_set_dmamode(struct ata_p pci_write_config_word(dev, master_port, master_data); } pci_write_config_byte(dev, 0x48, udma_enable); + + spin_unlock_irqrestore(&rdc_lock, flags); } static struct ata_port_operations rdc_pata_ops = { -- 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