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-rw-r--r--target/linux/rb532/patches/220-serial_fix.patch18
1 files changed, 18 insertions, 0 deletions
diff --git a/target/linux/rb532/patches/220-serial_fix.patch b/target/linux/rb532/patches/220-serial_fix.patch
new file mode 100644
index 0000000000..d36f263a33
--- /dev/null
+++ b/target/linux/rb532/patches/220-serial_fix.patch
@@ -0,0 +1,18 @@
+diff -urN linux.old/drivers/serial/8250.c linux.dev/drivers/serial/8250.c
+--- linux.old/drivers/serial/8250.c 2006-06-08 20:21:20.000000000 +0200
++++ linux.dev/drivers/serial/8250.c 2006-06-08 20:19:40.000000000 +0200
+@@ -351,6 +351,13 @@
+ default:
+ outb(value, up->port.iobase + offset);
+ }
++
++#if defined(CONFIG_IDT_EB434) || defined(CONFIG_MIKROTIK_RB500)
++ __SLOW_DOWN_IO;
++ __SLOW_DOWN_IO;
++ __SLOW_DOWN_IO;
++ __SLOW_DOWN_IO;
++#endif
+ }
+
+ /*
+