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Subject[PATCH 7/7] pch_uart: Fix duplicate memory release issue
Date
Add initialize variable to prevent duplicate free memory.

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
---
drivers/tty/serial/pch_uart.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 6e7f0ac..803847b 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -660,10 +660,13 @@ static void pch_free_dma(struct uart_port *port)
dma_release_channel(priv->chan_rx);
priv->chan_rx = NULL;
}
- if (sg_dma_address(&priv->sg_rx))
- dma_free_coherent(port->dev, port->fifosize,
- sg_virt(&priv->sg_rx),
- sg_dma_address(&priv->sg_rx));
+
+ if (priv->rx_buf_dma) {
+ dma_free_coherent(port->dev, port->fifosize, priv->rx_buf_virt,
+ priv->rx_buf_dma);
+ priv->rx_buf_virt = NULL;
+ priv->rx_buf_dma = 0;
+ }

return;
}
--
1.7.7.6


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