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Axel Haslam 8d6fbe9bf9 greybus: uart: Use a fifo to send data to the modules The firmware now buffers data instead of blocking while the transfer is sent, and the write operation cannot sleep. Instead of using gb_transfer_sync (which sleeps) in the write callback, buffer data in a fifo and send it from from a work queue. The write_room callback will will report 1 byte less that what is really available in the fifo, to leave space for extra characters that may be added by the tty layer. Signed-off-by: Axel Haslam <ahaslam@baylibre.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>	History 2016-05-31 17:18:18 -07:00
drivers/staging/greybus	greybus: uart: Use a fifo to send data to the modules	2016-05-31 17:18:18 -07:00

Axel Haslam 8d6fbe9bf9 greybus: uart: Use a fifo to send data to the modules

The firmware now buffers data instead of blocking while the transfer
is sent, and the write operation cannot sleep.

Instead of using gb_transfer_sync (which sleeps) in the write callback,
buffer data in a fifo and send it from from a work queue.

The write_room callback will will report 1 byte less that what is really
available in the fifo, to leave space for extra characters that may
be added by the tty layer.

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

History

2016-05-31 17:18:18 -07:00

drivers/staging/greybus

greybus: uart: Use a fifo to send data to the modules

2016-05-31 17:18:18 -07:00