diff options
| author | Victor Ryabukhin <vryabukhin@nvidia.com> | 2011-03-07 18:23:03 +0900 |
|---|---|---|
| committer | Varun Colbert <vcolbert@nvidia.com> | 2011-03-08 21:06:36 -0800 |
| commit | ba46e4d1b1a9c29df06baaa1f30442be4c37f99e (patch) | |
| tree | 4475c258c92966bece6cf97664aea768b437aa85 | |
| parent | 12969307ec39ddaf913b84628d1c192eb2e59dc8 (diff) | |
tegra hsuart: Clean tx_bytes in tegra_flush_buffer
tx_bytes might contain amount of bytes which should
be transmitted after next "tx empty" interrupt.
If we clear xmit circular buffer, tx_bytes should
also be set to 0, otherwise it will lead to crash
in fill_tx_fifo.
Bug 794635
Change-Id: Ia34aba33dd09730c8f91d19e5c103cf1060a357e
Reviewed-on: http://git-master/r/21844
Reviewed-by: Varun Colbert <vcolbert@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>
| -rw-r--r-- | drivers/serial/tegra_hsuart.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/serial/tegra_hsuart.c b/drivers/serial/tegra_hsuart.c index 6c669cb613ec..f57ec8223492 100644 --- a/drivers/serial/tegra_hsuart.c +++ b/drivers/serial/tegra_hsuart.c @@ -1113,8 +1113,8 @@ static void tegra_set_termios(struct uart_port *u, struct ktermios *termios, } /* - * Flush any TX data submitted for DMA. Called when the TX circular - * buffer is reset. + * Flush any TX data submitted for DMA and PIO. Called when the + * TX circular buffer is reset. */ static void tegra_flush_buffer(struct uart_port *u) { @@ -1124,6 +1124,8 @@ static void tegra_flush_buffer(struct uart_port *u) t = container_of(u, struct tegra_uart_port, uport); + t->tx_bytes = 0; + if (t->use_tx_dma) { tegra_dma_dequeue_req(t->tx_dma, &t->tx_dma_req); t->tx_dma_req.size = 0; |