[PATCH] powerpc: gamecube/wii: fix off-by-one error in ugecon/usbgecko_udbg

[Albert Herranz]

The retry logic in ug_putc() is broken.

If the TX fifo is not ready and the counter runs out it will have a
value of -1 and no transfer should be attempted. Also, a counter
with a value of 0 means that the TX fifo got ready in the last try
and the transfer should be attempted.

Reported-by: "Juha Leppanen" <juha_motorsportcom at luukku.com>
Signed-off-by: "Juha Leppanen" <juha_motorsportcom at luukku.com>
Signed-off-by: Albert Herranz <albert_herranz at yahoo.es>
---
 arch/powerpc/boot/ugecon.c                         |    2 +-
 arch/powerpc/platforms/embedded6xx/usbgecko_udbg.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/boot/ugecon.c b/arch/powerpc/boot/ugecon.c
index 50609ea..8f2a6b3 100644
--- a/arch/powerpc/boot/ugecon.c
+++ b/arch/powerpc/boot/ugecon.c
@@ -86,7 +86,7 @@ static void ug_putc(char ch)
 
 	while (!ug_is_txfifo_ready() && count--)
 		barrier();
-	if (count)
+	if (count >= 0)
 		ug_raw_putc(ch);
 }
 
diff --git a/arch/powerpc/platforms/embedded6xx/usbgecko_udbg.c b/arch/powerpc/platforms/embedded6xx/usbgecko_udbg.c
index edc956c..20a8ed9 100644
--- a/arch/powerpc/platforms/embedded6xx/usbgecko_udbg.c
+++ b/arch/powerpc/platforms/embedded6xx/usbgecko_udbg.c
@@ -120,7 +120,7 @@ static void ug_putc(char ch)
 
 	while (!ug_is_txfifo_ready() && count--)
 		barrier();
-	if (count)
+	if (count >= 0)
 		ug_raw_putc(ch);
 }
 
-- 
1.6.3.3