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    Subject[PATCH 1/5] pata_via: Blacklist some combinations of Transcend Flash and via
    Date
    Reported by Mikulas Patocka.

    VIA VT82C586B + Transcend TS64GSSD25-M v0826 does not work in UDMA mode

    Signed-off-by: Alan Cox <alan@linux.intel.com>
    ---

    drivers/ata/pata_via.c | 27 +++++++++++++++++++++++++++
    1 files changed, 27 insertions(+), 0 deletions(-)


    diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
    index 88984b8..2fb8be2 100644
    --- a/drivers/ata/pata_via.c
    +++ b/drivers/ata/pata_via.c
    @@ -337,6 +337,32 @@ static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev)
    }

    /**
    + * via_mode_filter - filter buggy device/mode pairs
    + * @dev: ATA device
    + * @mask: Mode bitmask
    + *
    + * We need to apply some minimal filtering for old controllers and at least
    + * one breed of Transcend SSD. Return the updated mask.
    + */
    +
    +static unsigned long via_mode_filter(struct ata_device *dev, unsigned long mask)
    +{
    + struct ata_host *host = dev->link->ap->host;
    + const struct via_isa_bridge *config = host->private_data;
    + unsigned char model_num[ATA_ID_PROD_LEN + 1];
    +
    + if (config->id == PCI_DEVICE_ID_VIA_82C586_0) {
    + ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
    + if (strcmp(model_num, "TS64GSSD25-M") == 0) {
    + ata_dev_printk(dev, KERN_WARNING,
    + "disabling UDMA mode due to reported lockups with this device.\n");
    + mask &= ~ ATA_MASK_UDMA;
    + }
    + }
    + return ata_bmdma_mode_filter(dev, mask);
    +}
    +
    +/**
    * via_tf_load - send taskfile registers to host controller
    * @ap: Port to which output is sent
    * @tf: ATA taskfile register set
    @@ -427,6 +453,7 @@ static struct ata_port_operations via_port_ops = {
    .prereset = via_pre_reset,
    .sff_tf_load = via_tf_load,
    .port_start = via_port_start,
    + .mode_filter = via_mode_filter,
    };

    static struct ata_port_operations via_port_ops_noirq = {


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      Last update: 2009-11-17 16:11    [W:0.022 / U:1.488 seconds]
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