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tty: r3964: Use tty->read_wait waitqueue

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The tty core provides read_wait waitqueue specifically for line
disciplines to wait readers; otherwise, the line discipline may
miss wakeups generated by the tty core.

NB: The tty core already provides serialization for the line discipline's
close() method, and guarantees no readers or writers will be using the
closing instance of the line discipline. Completely remove that wakeup.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2015-10-10 16:00:55 -04:00 • committed by Greg Kroah-Hartman
parent cc2aaabfd6
commit 9b9ab1b3f0
2 changed files with 4 additions and 9 deletions
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3
include/linux/n_r3964.h
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@ -152,9 +152,6 @@ struct r3964_info {
unsigned char *rx_buf; /* ring buffer */
unsigned char *tx_buf;
wait_queue_head_t read_wait;
//struct wait_queue *read_wait;
struct r3964_block_header *rx_first;
struct r3964_block_header *rx_last;
struct r3964_block_header *tx_first;