diff options
| -rw-r--r-- | drivers/ata/libata-core.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 6ac4f32ddcc..335ac8fb525 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1660,7 +1660,7 @@ 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 may_fallback = 1, tried_spinup = 0; int rc; if (ata_msg_ctl(ap)) @@ -1704,11 +1704,31 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, return -ENOENT; } + /* Device or controller might have reported the wrong + * device class. Give a shot at the other IDENTIFY if + * the current one is aborted by the device. + */ + if (may_fallback && + (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { + may_fallback = 0; + + if (class == ATA_DEV_ATA) + class = ATA_DEV_ATAPI; + else + class = ATA_DEV_ATA; + goto retry; + } + rc = -EIO; reason = "I/O error"; goto err_out; } + /* Falling back doesn't make sense if ID data was read + * successfully at least once. + */ + may_fallback = 0; + swap_buf_le16(id, ATA_ID_WORDS); /* sanity check */ |