1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/ide/pci/serverworks.c b/drivers/ide/pci/serverworks.c
index 6234f806c6b5..1f80c6d58805 100644
--- a/drivers/ide/pci/serverworks.c
+++ b/drivers/ide/pci/serverworks.c
@@ -158,6 +158,12 @@ static int svwks_tune_chipset (ide_drive_t *drive, u8 xferspeed)
         pci_read_config_word(dev, 0x4A, &csb5_pio);
         pci_read_config_byte(dev, 0x54, &ultra_enable);
 
+        /* If we are in RAID mode (eg AMI MegaIDE) then we can't it
+           turns out trust the firmware configuration */
+
+        if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
+                goto oem_setup_failed;
+
         /* Per Specified Design by OEM, and ASIC Architect */
         if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
             (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {