diff options
| -rw-r--r-- | 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 520d5a31f8a2..78eac276effb 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 = { |