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Diffstat (limited to 'packages/linux/linux-2.6.18/fix-usart3-rx-BUG.patch')
-rw-r--r--packages/linux/linux-2.6.18/fix-usart3-rx-BUG.patch25
1 files changed, 25 insertions, 0 deletions
diff --git a/packages/linux/linux-2.6.18/fix-usart3-rx-BUG.patch b/packages/linux/linux-2.6.18/fix-usart3-rx-BUG.patch
new file mode 100644
index 0000000000..1035f9f010
--- /dev/null
+++ b/packages/linux/linux-2.6.18/fix-usart3-rx-BUG.patch
@@ -0,0 +1,25 @@
+---
+ drivers/serial/atmel_usart.c | 10 ++++++++--
+ 1 file changed, 8 insertions(+), 2 deletions(-)
+
+Index: linux-2.6.18-avr32/drivers/serial/atmel_usart.c
+===================================================================
+--- linux-2.6.18-avr32.orig/drivers/serial/atmel_usart.c 2006-11-24 15:59:38.000000000 +0100
++++ linux-2.6.18-avr32/drivers/serial/atmel_usart.c 2006-11-24 15:59:46.000000000 +0100
+@@ -194,8 +194,14 @@ static inline int rx_dma_update_tail(str
+ usart3_writel(up, RNCR, RX_BUFFER_SIZE);
+
+ again = 1;
+- } else
+- BUG_ON(usart3_readl(up, CSR) & USART3_BIT(ENDRX));
++ } else if(usart3_readl(up, CSR) & USART3_BIT(ENDRX)) {
++ /*
++ * The USART hit the end of the buffer after head was
++ * updated. Let's do another pass so that we can
++ * avoid taking another interrupt immediately.
++ */
++ again = 1;
++ }
+
+ up->rx_tail = tail;
+