diff options
| author | Victor Ryabukhin <vryabukhin@nvidia.com> | 2011-03-07 18:23:03 +0900 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-11-30 21:43:17 -0800 |
| commit | 3fad3d4755d8b65e5943e9ccb0ba8c29adf6b3e2 (patch) | |
| tree | 3b8a7660338b2678bca178e2edcfc505329e4894 /drivers/tty/serial | |
| parent | c7f42a8b491370aba3f0e4019fe16552f15c02c8 (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
Original-Change-Id: Ia34aba33dd09730c8f91d19e5c103cf1060a357e
Reviewed-on: http://git-master/r/21844
Reviewed-by: Varun Colbert <vcolbert@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>
Rebase-Id: R859c45ffc09b0558861536c6f2f64154cd56ea4e
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/tegra_hsuart.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/tty/serial/tegra_hsuart.c b/drivers/tty/serial/tegra_hsuart.c index 0cb818731d4b..f95bfff57d87 100644 --- a/drivers/tty/serial/tegra_hsuart.c +++ b/drivers/tty/serial/tegra_hsuart.c @@ -1110,8 +1110,8 @@ 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) { @@ -1121,6 +1121,8 @@ 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; |