diff options
Diffstat (limited to 'drivers/ata/libata-core.c')
| -rw-r--r-- | drivers/ata/libata-core.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 6d0a946afe8..227399e4847 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1649,13 +1649,13 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, struct ata_taskfile tf; unsigned int err_mask = 0; const char *reason; + int tried_spinup = 0; int rc; if (ata_msg_ctl(ap)) ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ - retry: ata_tf_init(dev, &tf); @@ -1712,6 +1712,32 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, goto err_out; } + if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { + tried_spinup = 1; + /* + * Drive powered-up in standby mode, and requires a specific + * SET_FEATURES spin-up subcommand before it will accept + * anything other than the original IDENTIFY command. + */ + ata_tf_init(dev, &tf); + tf.command = ATA_CMD_SET_FEATURES; + tf.feature = SETFEATURES_SPINUP; + tf.protocol = ATA_PROT_NODATA; + tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; + err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); + if (err_mask) { + rc = -EIO; + reason = "SPINUP failed"; + goto err_out; + } + /* + * If the drive initially returned incomplete IDENTIFY info, + * we now must reissue the IDENTIFY command. + */ + if (id[2] == 0x37c8) + goto retry; + } + if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { /* * The exact sequence expected by certain pre-ATA4 drives is: |