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| /openbmc/linux/drivers/tty/serial/8250/ |
| H A D | 8250_dma.c | diff f8fd1b0350d3a4581125f5eda6528f5a2c5f9183 Thu Apr 24 04:34:48 CDT 2014 Loic Poulain <loic.poulain@intel.com> serial: 8250: Fix thread unsafe __dma_tx_complete function
__dma_tx_complete is not protected against concurrent
call of serial8250_tx_dma. it can lead to circular tail
index corruption or parallel call of serial_tx_dma on the
same data portion.
This patch fixes this issue by holding the port lock.
Signed-off-by: Loic Poulain <loic.poulain@intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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