[PATCH] SGI IOC4: Detect IO card variant
There are three different IO cards which an SGI IOC4 controller may find
itself on. One of these variants does not bring out the IDE and serial
signals, so we need to disable attaching the corresponding IOC4 subdrivers
to such cards.
Cleans up message clutter emitted during device probing.
Signed-off-by: Brent Casavant <bcasavan@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/serial/ioc4_serial.c b/drivers/serial/ioc4_serial.c
index c620209..717e47b 100644
--- a/drivers/serial/ioc4_serial.c
+++ b/drivers/serial/ioc4_serial.c
@@ -2646,7 +2646,10 @@
struct ioc4_port *port;
struct ioc4_soft *soft;
+ /* If serial driver did not attach, don't try to detach */
control = idd->idd_serial_data;
+ if (!control)
+ return 0;
for (port_num = 0; port_num < IOC4_NUM_SERIAL_PORTS; port_num++) {
for (port_type = UART_PORT_MIN;
@@ -2778,6 +2781,12 @@
DPRINT_CONFIG(("%s (0x%p, 0x%p)\n", __FUNCTION__, idd->idd_pdev,
idd->idd_pci_id));
+ /* PCI-RT does not bring out serial connections.
+ * Do not attach to this particular IOC4.
+ */
+ if (idd->idd_variant == IOC4_VARIANT_PCI_RT)
+ return 0;
+
/* request serial registers */
tmp_addr1 = idd->idd_bar0 + IOC4_SERIAL_OFFSET;