From: [email protected]
There was an ASIC bug in the SB600 SATA controller of low revision (<=13) and CD burning may hang (only SATA ODD has this issue, and SATA HDD works well). The patch provides a workaround for this issue.
Signed-off-by: Luugi Marsan <[email protected]>
--- linux-2.6.19-rc4-git5/drivers/ata/ahci.c.orig 2006-11-04 03:56:22.000000000 +0800
+++ linux-2.6.19-rc4-git5/drivers/ata/ahci.c 2006-11-04 04:20:36.000000000 +0800
@@ -189,6 +189,7 @@ struct ahci_host_priv {
unsigned long flags;
u32 cap; /* cache of HOST_CAP register */
u32 port_map; /* cache of HOST_PORTS_IMPL reg */
+ u8 rev; /* PCI Revision ID */
};
struct ahci_port_priv {
@@ -220,6 +221,7 @@ static int ahci_port_resume(struct ata_p
static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
static int ahci_pci_device_resume(struct pci_dev *pdev);
static void ahci_remove_one (struct pci_dev *pdev);
+static int ahci_check_atapi_dma(struct ata_queued_cmd *qc);
static struct scsi_host_template ahci_sht = {
.module = THIS_MODULE,
@@ -251,6 +253,8 @@ static const struct ata_port_operations
.tf_read = ahci_tf_read,
+ .check_atapi_dma = ahci_check_atapi_dma,
+
.qc_prep = ahci_qc_prep,
.qc_issue = ahci_qc_issue,
@@ -906,6 +910,28 @@ static unsigned int ahci_fill_sg(struct
return n_sg;
}
+static int ahci_check_atapi_dma(struct ata_queued_cmd *qc)
+{
+ struct pci_dev *pdev = to_pci_dev(qc->ap->host->dev);
+
+ /* walkaround for SB600 SATA ODD isuue */
+ if (0x1002 == pdev->vendor && 0x4380 == pdev->device)
+ {
+ struct ahci_host_priv *priv = qc->ap->host->private_data;
+ u32 rq_len, low_8k;
+
+ if ( 13 < priv->rev )
+ return 0;
+
+ rq_len = qc->scsicmd->request_bufflen;
+ low_8k = rq_len & 0x1fff;
+
+ if ( (rq_len & 0xffffe000) && low_8k && (512 > low_8k) )
+ return 1;
+ }
+ return 0;
+}
+
static void ahci_qc_prep(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
@@ -1366,6 +1392,7 @@ static int ahci_host_init(struct ata_pro
hpriv->cap = readl(mmio + HOST_CAP);
hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
+ pci_read_config_byte(pdev, PCI_REVISION_ID, &hpriv->rev);
probe_ent->n_ports = (hpriv->cap & 0x1f) + 1;
VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
