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authorJiri Slaby <jirislaby@gmail.com>2009-07-16 16:06:18 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2009-07-16 09:19:16 -0700
commit9237a81a1468d0aca1cc4e244bba2362d6f81b35 (patch)
treea7bb7bf9f834e25fe7b8189eca678c33dfb19130 /drivers/char/nozomi.c
parent5c9228f0cfb09a098a8a380116b42ae099e967b6 (diff)
downloadop-kernel-dev-9237a81a1468d0aca1cc4e244bba2362d6f81b35.zip
op-kernel-dev-9237a81a1468d0aca1cc4e244bba2362d6f81b35.tar.gz
tty: nozomi, fix tty refcounting bug
Don't forget to drop a tty refererence on fail paths in receive_data(). Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/nozomi.c')
-rw-r--r--drivers/char/nozomi.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c
index 574f1c7..280b41c 100644
--- a/drivers/char/nozomi.c
+++ b/drivers/char/nozomi.c
@@ -828,7 +828,7 @@ static int receive_data(enum port_type index, struct nozomi *dc)
struct port *port = &dc->port[index];
void __iomem *addr = port->dl_addr[port->toggle_dl];
struct tty_struct *tty = tty_port_tty_get(&port->port);
- int i;
+ int i, ret;
if (unlikely(!tty)) {
DBG1("tty not open for port: %d?", index);
@@ -844,12 +844,14 @@ static int receive_data(enum port_type index, struct nozomi *dc)
/* disable interrupt in downlink... */
disable_transmit_dl(index, dc);
- return 0;
+ ret = 0;
+ goto put;
}
if (unlikely(size == 0)) {
dev_err(&dc->pdev->dev, "size == 0?\n");
- return 1;
+ ret = 1;
+ goto put;
}
tty_buffer_request_room(tty, size);
@@ -871,8 +873,10 @@ static int receive_data(enum port_type index, struct nozomi *dc)
}
set_bit(index, &dc->flip);
+ ret = 1;
+put:
tty_kref_put(tty);
- return 1;
+ return ret;
}
/* Debug for interrupts */
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