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authorAlan Cox <alan@linux.intel.com>2009-11-30 13:22:43 +0000
committerJeff Garzik <jgarzik@redhat.com>2009-12-03 02:46:36 -0500
commit10734fc8d5fbf89e88519d72e58cce83be21941a (patch)
treefd0639939de17a57be11166d2673e6baf64d1fee /drivers/ata/pata_via.c
parent294264a94215f5a16a92e8e6b05252ed22fed249 (diff)
downloadop-kernel-dev-10734fc8d5fbf89e88519d72e58cce83be21941a.zip
op-kernel-dev-10734fc8d5fbf89e88519d72e58cce83be21941a.tar.gz
pata_via: Blacklist some combinations of Transcend Flash and via
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> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/pata_via.c')
-rw-r--r--drivers/ata/pata_via.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index 520d5a3..78eac27 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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