rpms/kernel/F-11 linux-2.6-serial-add-txen-test-param.patch, NONE, 1.1 kernel.spec, 1.1544, 1.1545

[Chuck Ebbert]

Author: cebbert

Update of /cvs/pkgs/rpms/kernel/F-11
In directory cvs1.fedora.phx.redhat.com:/tmp/cvs-serv24387

Modified Files:
	kernel.spec 
Added Files:
	linux-2.6-serial-add-txen-test-param.patch 
Log Message:
Add serial driver option to skip testing for the TXEN bug. (#495762)

linux-2.6-serial-add-txen-test-param.patch:

--- NEW FILE linux-2.6-serial-add-txen-test-param.patch ---
Allow users to force skipping the TXEN test at init time. Applies
to all serial ports. Intended for debugging only.

Signed-off-by: Chuck Ebbert <cebbert at redhat.com>

Index: linux-2.6.29.noarch/drivers/serial/8250.c
===================================================================
--- linux-2.6.29.noarch.orig/drivers/serial/8250.c
+++ linux-2.6.29.noarch/drivers/serial/8250.c
@@ -67,6 +67,8 @@ static int serial_index(struct uart_port
 	return (serial8250_reg.minor - 64) + port->line;
 }
 
+static unsigned int skip_txen_test; /* force skip of txen test at init time */
+
 /*
  * Debugging.
  */
@@ -2097,7 +2099,7 @@ static int serial8250_startup(struct uar
 	   is variable. So, let's just don't test if we receive
 	   TX irq. This way, we'll never enable UART_BUG_TXEN.
 	 */
-	if (up->port.flags & UPF_NO_TXEN_TEST)
+	if (skip_txen_test || up->port.flags & UPF_NO_TXEN_TEST)
 		goto dont_test_tx_en;
 
 	/*
@@ -3245,6 +3247,9 @@ MODULE_PARM_DESC(share_irqs, "Share IRQs
 module_param(nr_uarts, uint, 0644);
 MODULE_PARM_DESC(nr_uarts, "Maximum number of UARTs supported. (1-" __MODULE_STRING(CONFIG_SERIAL_8250_NR_UARTS) ")");
 
+module_param(skip_txen_test, uint, 0644);
+MODULE_PARM_DESC(skip_txen_test, "Skip checking for the TXEN bug at init time");
+
 #ifdef CONFIG_SERIAL_8250_RSA
 module_param_array(probe_rsa, ulong, &probe_rsa_count, 0444);
 MODULE_PARM_DESC(probe_rsa, "Probe I/O ports for RSA");


Index: kernel.spec
===================================================================
RCS file: /cvs/pkgs/rpms/kernel/F-11/kernel.spec,v
retrieving revision 1.1544
retrieving revision 1.1545
diff -u -r1.1544 -r1.1545
--- kernel.spec	15 Apr 2009 06:36:56 -0000	1.1544
+++ kernel.spec	15 Apr 2009 16:11:39 -0000	1.1545
@@ -636,6 +636,7 @@
 Patch453: linux-2.6-input-wacom-bluetooth.patch
 
 Patch460: linux-2.6-serial-460800.patch
+Patch461: linux-2.6-serial-add-txen-test-param.patch
 
 # 8192 too low
 Patch480: increase-MAX_LOCKDEP_ENTRIES.patch
@@ -1276,6 +1277,8 @@
 
 # Allow to use 480600 baud on 16C950 UARTs
 ApplyPatch linux-2.6-serial-460800.patch
+# let users skip the TXEN bug test
+ApplyPatch linux-2.6-serial-add-txen-test-param.patch
 
 ApplyPatch increase-MAX_LOCKDEP_ENTRIES.patch
 
@@ -1963,6 +1966,9 @@
 # and build.
 
 %changelog
+* Wed Apr 15 2009 Chuck Ebbert <cebbert at redhat.com>
+- Add serial driver option to skip testing for the TXEN bug. (#495762)
+
 * Wed Apr 15 2009 Dave Airlie <airlied at redhat.com>
 - drm-modesetting-radeon: fix rs690 video (#492685) + add bandwidth calcs