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authorAlan Cox <alan@linux.intel.com>2009-11-30 13:16:41 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2009-12-11 15:18:06 -0800
commit44e4909e453eaa09c7de409fc9ee4ebefd986c1c (patch)
tree5bad1ed70f24c7cedd61a7664afe3706abab4e2f /include
parent1f100b323d19469b06a63ccd6130ed71760145cc (diff)
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tty: tty_port: Change the buffer allocator locking
We want to be able to do this without regard for the activate/own open method being used which causes a problem using port->mutex. Add another mutex for now. Once everything uses port_open to do buffer allocs we can kill it back off Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
-rw-r--r--include/linux/tty.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 6352ac257fc..e9269ca1542 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -212,6 +212,7 @@ struct tty_port {
wait_queue_head_t delta_msr_wait; /* Modem status change */
unsigned long flags; /* TTY flags ASY_*/
struct mutex mutex; /* Locking */
+ struct mutex buf_mutex; /* Buffer alloc lock */
unsigned char *xmit_buf; /* Optional buffer */
unsigned int close_delay; /* Close port delay */
unsigned int closing_wait; /* Delay for output */