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authorJan Yenya Kasprzak <kas@fi.muni.cz>2007-04-23 14:41:02 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-04-24 08:23:07 -0700
commit67d2bc58afdd5168dce54ae06f5f30038c59f498 (patch)
tree0036ede42ee23a9c2092dcab2ffad10fff6a5014
parent3d124cbba316737af8f3a6959edb95bbd130a4d8 (diff)
Char: mxser_new, fix recursive locking
Signed-off-by: Jan "Yenya" Kasprzak <kas@fi.muni.cz> Acked-by: Jiri Slaby <jirislaby@gmail.com> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/char/mxser_new.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/char/mxser_new.c b/drivers/char/mxser_new.c
index 9af07e4999d..59e0aac19c2 100644
--- a/drivers/char/mxser_new.c
+++ b/drivers/char/mxser_new.c
@@ -2230,7 +2230,14 @@ end_intr:
port->mon_data.rxcnt += cnt;
port->mon_data.up_rxcnt += cnt;
+ /*
+ * We are called from an interrupt context with &port->slock
+ * being held. Drop it temporarily in order to prevent
+ * recursive locking.
+ */
+ spin_unlock(&port->slock);
tty_flip_buffer_push(tty);
+ spin_lock(&port->slock);
}
static void mxser_transmit_chars(struct mxser_port *port)