[PATCH] fix console fifo (and loadb/loady commands)

[Alexey Galakhov]

This patch fixes loadb and loady commands. tstc() should return true if
console_input_buffer is not empty.

diff -udp ./common/console.c.orig ./common/console.c
--- ./common/console.c.orig    2011-05-06 13:30:20.000000000 +0600
+++ ./common/console.c    2011-05-13 19:42:12.000000000 +0600
@@ -195,6 +195,20 @@ static int getc_raw(void)
     }
 }
 
+static int tstc_raw(void)
+{
+    struct console_device *cdev;
+
+    for_each_console(cdev) {
+        if (!(cdev->f_active & CONSOLE_STDIN))
+            continue;
+        if (cdev->tstc(cdev))
+            return 1;
+    }
+
+    return 0;
+}
+
 int getc(void)
 {
     unsigned char ch;
@@ -209,7 +223,7 @@ int getc(void)
     while (1) {
         poller_call();
 
-        if (tstc()) {
+        if (tstc_raw()) {
             kfifo_putc(console_input_buffer, getc_raw());
 
             start = get_time_ns();
@@ -236,16 +250,7 @@ EXPORT_SYMBOL(fgetc);
 
 int tstc(void)
 {
-    struct console_device *cdev;
-
-    for_each_console(cdev) {
-        if (!(cdev->f_active & CONSOLE_STDIN))
-            continue;
-        if (cdev->tstc(cdev))
-            return 1;
-    }
-
-    return 0;
+    return kfifo_len(console_input_buffer) || tstc_raw();
 }
 EXPORT_SYMBOL(tstc);