Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...

[safe/jmp/linux-2.6] / drivers / ata / libata-core.c

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 87b47bd..0abd72d 100644 (file)
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1784,6 +1784,13 @@ int ata_dev_configure(struct ata_device *dev)
                dev->max_sectors = ATA_MAX_SECTORS;
        }
 
+       if (ata_device_blacklisted(dev) & ATA_HORKAGE_MAX_SEC_128)
+               dev->max_sectors = min(ATA_MAX_SECTORS_128, dev->max_sectors);
+
+       /* limit ATAPI DMA to R/W commands only */
+       if (ata_device_blacklisted(dev) & ATA_HORKAGE_DMA_RW_ONLY)
+               dev->horkage |= ATA_HORKAGE_DMA_RW_ONLY;
+
        if (ap->ops->dev_config)
                ap->ops->dev_config(ap, dev);
 
@@ -3352,6 +3359,10 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
        { "_NEC DV5800A",       NULL,           ATA_HORKAGE_NODMA },
        { "SAMSUNG CD-ROM SN-124","N001",       ATA_HORKAGE_NODMA },
 
+       /* Weird ATAPI devices */
+       { "TORiSAN DVD-ROM DRD-N216", NULL,     ATA_HORKAGE_MAX_SEC_128 |
+                                               ATA_HORKAGE_DMA_RW_ONLY },
+
        /* Devices we expect to fail diagnostics */
 
        /* Devices where NCQ should be avoided */
@@ -3679,6 +3690,26 @@ int ata_check_atapi_dma(struct ata_queued_cmd *qc)
        struct ata_port *ap = qc->ap;
        int rc = 0; /* Assume ATAPI DMA is OK by default */
 
+       /* some drives can only do ATAPI DMA on read/write */
+       if (unlikely(qc->dev->horkage & ATA_HORKAGE_DMA_RW_ONLY)) {
+               struct scsi_cmnd *cmd = qc->scsicmd;
+               u8 *scsicmd = cmd->cmnd;
+
+               switch (scsicmd[0]) {
+               case READ_10:
+               case WRITE_10:
+               case READ_12:
+               case WRITE_12:
+               case READ_6:
+               case WRITE_6:
+                       /* atapi dma maybe ok */
+                       break;
+               default:
+                       /* turn off atapi dma */
+                       return 1;
+               }
+       }
+
        if (ap->ops->check_atapi_dma)
                rc = ap->ops->check_atapi_dma(qc);
 
@@ -4722,8 +4753,8 @@ static void fill_result_tf(struct ata_queued_cmd *qc)
 {
        struct ata_port *ap = qc->ap;
 
-       ap->ops->tf_read(ap, &qc->result_tf);
        qc->result_tf.flags = qc->tf.flags;
+       ap->ops->tf_read(ap, &qc->result_tf);
 }
 
 /**