[PATCH] ahci: let users know that Promise PDC42819 support is limited to SATA devices

[PATCH] ahci: let users know that Promise PDC42819 support is limited to SATA devices

[Mark Nelson]

ahci can drive the Promise PDC42819, but obviously it can only use SATA
disks connected to this controller. The controller can actually support
SAS disks as well, but we only know how to use it in it's AHCI mode.

Add a message to let users know that because ahci is driving their chip
they can only use the SATA disks connected to this controller.

Signed-off-by: Mark Nelson <mdnelson8@gmail.com>
---
 drivers/ata/ahci.c |    8 ++++++++
 1 file changed, 8 insertions(+)

Index: linux-2.6/drivers/ata/ahci.c
===================================================================
--- linux-2.6.orig/drivers/ata/ahci.c
+++ linux-2.6/drivers/ata/ahci.c
@@ -2988,6 +2988,14 @@ static int ahci_init_one(struct pci_dev
 	if (pdev->vendor == PCI_VENDOR_ID_MARVELL && !marvell_enable)
 		return -ENODEV;

+	/* Promise's PDC42819 is a SAS/SATA controller that has an AHCI mode.
+	 * At the moment, we can only use the AHCI mode. Let the users know
+	 * that for SAS drives they're out of luck.
+	 */
+	if (pdev->vendor == PCI_VENDOR_ID_PROMISE)
+		dev_printk(KERN_INFO, &pdev->dev, "PDC42819 "
+			   "can only drive SATA devices with this driver\n");
+
 	/* acquire resources */
 	rc = pcim_enable_device(pdev);
 	if (rc)

Re: [PATCH] ahci: let users know that Promise PDC42819 support is limited to SATA devices

[Jeff Garzik]

On 11/21/2009 08:07 PM, Mark Nelson wrote:
> ahci can drive the Promise PDC42819, but obviously it can only use SATA
> disks connected to this controller. The controller can actually support
> SAS disks as well, but we only know how to use it in it's AHCI mode.
>
> Add a message to let users know that because ahci is driving their chip
> they can only use the SATA disks connected to this controller.
>
> Signed-off-by: Mark Nelson<mdnelson8@gmail.com>
> ---
>   drivers/ata/ahci.c |    8 ++++++++
>   1 file changed, 8 insertions(+)

applied