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| author |   Richard Genoud <richard.genoud@gmail.com> | 2017-03-20 11:52:41 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-31 17:26:19 +0200 |
| commit | 31ca2c63fdc0aee725cbd4f207c1256f5deaabde (patch) | |
| tree | 56d7a7b2697c1c90a988dffb36539f452006763c /tools | |
| parent | serial: mxs-auart: Fix baudrate calculation (diff) | |
| download | linux-dev-31ca2c63fdc0aee725cbd4f207c1256f5deaabde.tar.xz linux-dev-31ca2c63fdc0aee725cbd4f207c1256f5deaabde.zip | |
tty/serial: atmel: fix race condition (TX+DMA)
If uart_flush_buffer() is called between atmel_tx_dma() and
atmel_complete_tx_dma(), the circular buffer has been cleared, but not
atmel_port->tx_len.
That leads to a circular buffer overflow (dumping (UART_XMIT_SIZE -
atmel_port->tx_len) bytes).
Tested-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Cc: stable <stable@vger.kernel.org> # 3.12+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions