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| author | Tejun Heo <htejun@gmail.com> | 2006-09-12 20:35:49 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-13 07:32:14 -0700 |
| commit | a4f5749ba6e3f23ae4a137cee10324830db4d081 (patch) | |
| tree | 5f3908d5bf29f97b65c01a140bb62a9ef9e3003a /drivers | |
| parent | 95064a75ebf8744e1ff595e8cd7ff9b6c851523e (diff) | |
| download | blackbird-op-linux-a4f5749ba6e3f23ae4a137cee10324830db4d081.tar.gz blackbird-op-linux-a4f5749ba6e3f23ae4a137cee10324830db4d081.zip | |
[PATCH] libata: ignore CFA signature while sanity-checking an ATAPI device
0x848a in ID word 0 indicates CFA device iff the ID data is obtained from
IDENTIFY DEVICE. For ATAPI devices, 0x848a in ID work 0 indicates valid
ATAPI device. Fix sanity check in ata_dev_read_id() such that ATAPI
devices reporting 0x848a in ID word 0 is not handled as error.
The problem is identified by J.A. Magallon with HL-DT-ST DVDRAM GSA-4120B.
Signed-off-by: Tejun Helo <htejun@gmail.com>
Cc: J.A. Magallon <jamagallon@ono.com>
Acked-by: Jeff Garzik <jeff@garzik.org>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/libata-core.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 73dd6c8deede..427b73a3886a 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -1256,10 +1256,15 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, swap_buf_le16(id, ATA_ID_WORDS); /* sanity check */ - if ((class == ATA_DEV_ATA) != (ata_id_is_ata(id) | ata_id_is_cfa(id))) { - rc = -EINVAL; - reason = "device reports illegal type"; - goto err_out; + rc = -EINVAL; + reason = "device reports illegal type"; + + if (class == ATA_DEV_ATA) { + if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) + goto err_out; + } else { + if (ata_id_is_ata(id)) + goto err_out; } if (post_reset && class == ATA_DEV_ATA) { |
