1 files changed, 33 insertions, 0 deletions
diff --git a/patches/memtest86+-4.20/0002-Use-serial-port-addresses-provided-by-BIOS.patch b/patches/memtest86+-4.20/0002-Use-serial-port-addresses-provided-by-BIOS.patch
new file mode 100644
index 000000000..9747df736
--- /dev/null
+++ b/patches/memtest86+-4.20/0002-Use-serial-port-addresses-provided-by-BIOS.patch
@@ -0,0 +1,33 @@
+From: Alexander Stein <alexander.stein@systec-electronic.com>
+Date: Wed, 23 Nov 2011 16:30:13 +0100
+Subject: [PATCH] Use serial port addresses provided by BIOS
+
+Using this patch memtest86+ uses the serial port addresses provided by BIOS rather hardcoded defaults.
+
+Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
+---
+ lib.c |    4 +++-
+ 1 files changed, 3 insertions(+), 1 deletions(-)
+
+diff --git a/lib.c b/lib.c
+index d107039..91ea950 100644
+--- a/lib.c
++++ b/lib.c
+@@ -24,7 +24,7 @@ short serial_cons = SERIAL_CONSOLE_DEFAULT;
+ #error Bad SERIAL_TTY. Only ttyS0 and ttyS1 are supported.
+ #endif
+ short serial_tty = SERIAL_TTY;
+-const short serial_base_ports[] = {0x3f8, 0x2f8, 0x3e8, 0x2e8};
++unsigned short serial_base_ports[] = {0x3f8, 0x2f8, 0x3e8, 0x2e8};
+ 
+ #if ((115200%SERIAL_BAUD_RATE) != 0)
+ #error Bad default baud rate
+@@ -1112,6 +1112,8 @@ void serial_console_setup(char *param)
+ 	serial_baud_rate = (int) baud_rate;
+  save_tty:
+ 	serial_tty = (short) tty;
++	/* fetch I/O port address from BIOS data area */
++	serial_base_ports[serial_tty] = ((const unsigned short *) 0x0400)[serial_tty];
+ 	serial_cons = 1;
+ }
+