tree bac31cc9c3c857d21b1b084260f443ebc8d25e6c
parent b9abaa3fb7328851bdeaad19e694048f0ff71d9a
author Russell King <rmk@dyn-67.arm.linux.org.uk> 1136675483 +0000
committer Russell King <rmk+kernel@arm.linux.org.uk> 1136675483 +0000

[SERIAL] Fix clocal wakeup problem

Jim Alexander reported a problem where "if one calls open() in
blocking mode with CLOCAL off, the 8250.c driver under the 2.6
kernel (or at least 2.6.8 and 2.6.10) does not wake up the
blocked process when DCD is asserted."

Fix this by enabling modem status interrupts immediately before
we read the carrier detect status.

Thanks to Jim for reporting the problem and testing the fix.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>