From: Johan Hovold <jhov...@gmail.com>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit e4c36076c2a6195ec62c35b03c3fde84d0087dc8 upstream.
Make sure to kill any already submitted read urbs on read-urb submission
failures in open in order to prevent doing I/O for a closed port.
Fixes: 088c64f81284 ("USB: cdc-acm: re-write read processing")
Signed-off-by: Johan Hovold <jhov...@gmail.com>
Signed-off-by: Jiri Slaby <jsl...@suse.cz>
---
drivers/usb/class/cdc-acm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 6774bf165083..ebbe89f60f7b 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -494,6 +494,7 @@ static int acm_port_activate(struct tty_port *port, struct
tty_struct *tty)
{
struct acm *acm = container_of(port, struct acm, port);
int retval = -ENODEV;
+ int i;
dev_dbg(&acm->control->dev, "%s\n", __func__);
@@ -542,6 +543,8 @@ static int acm_port_activate(struct tty_port *port, struct
tty_struct *tty)
return 0;
error_submit_read_urbs:
+ for (i = 0; i < acm->rx_buflimit; i++)
+ usb_kill_urb(acm->read_urbs[i]);
acm->ctrlout = 0;
acm_set_control(acm, acm->ctrlout);
error_set_control:
--
2.0.0
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