diff options
| author | Aaron Lu <aaron.lu@intel.com> | 2012-10-09 15:37:48 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-26 12:14:05 -0800 |
| commit | fee02d04c682f3ef8d1d1ec46e22fb7f833c9330 (patch) | |
| tree | 37eea1cda5330afb187c42bd4582c3495b57bed6 /drivers | |
| parent | 9e9dbb97a010f748114404bd44ab2e02082d215c (diff) | |
libata-acpi: Fix NULL ptr derference in ata_acpi_dev_handle
commit 60817a680b1bd3341b6909fab7d8a1fcc3a78369 upstream.
commit 6b66d95895c149cbc04d4fac5a2f5477c543a8ae didn't handle SATA PMP
case in ata_acpi_bind_device and will cause a NULL ptr dereference when
user attached a SATA drive to the PMP port. Fix this by checking PMP
support.
This bug is reported by Dan van der Ster in the following bugzilla page:
https://bugzilla.kernel.org/show_bug.cgi?id=48211
Reported-by: Dan van der Ster <dan@vanderster.com>
Tested-by: Dan van der Ster <dan@vanderster.com>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Tested-by: Simon <tangouniform@sbcglobal.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ata/libata-acpi.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index fd9ecf74e631..5b0ba3f20edc 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -1105,10 +1105,15 @@ static int ata_acpi_bind_device(struct ata_port *ap, struct scsi_device *sdev, struct acpi_device *acpi_dev; struct acpi_device_power_state *states; - if (ap->flags & ATA_FLAG_ACPI_SATA) - ata_dev = &ap->link.device[sdev->channel]; - else + if (ap->flags & ATA_FLAG_ACPI_SATA) { + if (!sata_pmp_attached(ap)) + ata_dev = &ap->link.device[sdev->id]; + else + ata_dev = &ap->pmp_link[sdev->channel].device[sdev->id]; + } + else { ata_dev = &ap->link.device[sdev->id]; + } *handle = ata_dev_acpi_handle(ata_dev); |