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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> | 2017-04-08 09:53:31 +0200 |
| commit | 74b8fc017d7689d1a60c9e234b2cfe3550b7f414 (patch) | |
| tree | a8bdb94a910d3599e7208fb710a9a9ecc31b0e21 /scripts | |
| parent | 566a8711a7dd11960fa0bf3a4fd89c742eb359f3 (diff) | |
tty/serial: atmel: fix race condition (TX+DMA)
commit 31ca2c63fdc0aee725cbd4f207c1256f5deaabde upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions