diff options
| author | Tejun Heo <htejun@gmail.com> | 2007-09-02 23:24:48 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-10-12 14:55:39 -0400 |
| commit | d7fbee050753e153622b5d41bc8bd1cb19cda9b9 (patch) | |
| tree | 962b543b95bdea7e2b6f9393b64250396640a616 /drivers | |
| parent | 3f19859ee95a38c066a0420eb8a30c76ecd67a42 (diff) | |
libata: assume ATA_DEV_ATA on diagnostic failure
Certain device which reports diagnostic failure also reports invalid
device signature. Assume ATA_DEV_ATA on diagnostic failure if reset
indicates device presence.
This is fix for bugzilla bug 8784.
http://bugzilla.kernel.org/show_bug.cgi?id=8784
Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Edward Amsden <amsden_linux@earthlink.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ata/libata-core.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index ea8c07b04f2..2116f279458 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -751,10 +751,20 @@ unsigned int ata_dev_try_classify(struct ata_device *dev, int present, /* determine if device is ATA or ATAPI */ class = ata_dev_classify(&tf); - if (class == ATA_DEV_UNKNOWN) - return ATA_DEV_NONE; - if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) - return ATA_DEV_NONE; + if (class == ATA_DEV_UNKNOWN) { + /* If the device failed diagnostic, it's likely to + * have reported incorrect device signature too. + * Assume ATA device if the device seems present but + * device signature is invalid with diagnostic + * failure. + */ + if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC)) + class = ATA_DEV_ATA; + else + class = ATA_DEV_NONE; + } else if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) + class = ATA_DEV_NONE; + return class; } |