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Message-Id: <1420937073-20835-3-git-send-email-jmmahler@gmail.com>
Date: Sat, 10 Jan 2015 16:44:33 -0800
From: Jeremiah Mahler <jmmahler@...il.com>
To: Johan Hovold <johan@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
Jeremiah Mahler <jmmahler@...il.com>
Subject: [RESEND PATCH v2 2/2] usb: serial: handle -ENODEV quietly in generic_submit_read_urb
If a USB serial device (e.g. /dev/ttyUSB0) with an active program is
unplugged, an -ENODEV (19) error will be produced after it gives up
trying to resubmit a read.
usb_serial_generic_submit_read_urb - usb_submit_urb failed: -19
Add -ENODEV as one of the permanent errors along with -EPERM that
usb_serial_generic_submit_read_urb() handles quietly without an error.
Signed-off-by: Jeremiah Mahler <jmmahler@...il.com>
---
drivers/usb/serial/generic.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index 2d7207b..ccf1df7 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -286,7 +286,7 @@ static int usb_serial_generic_submit_read_urb(struct usb_serial_port *port,
res = usb_submit_urb(port->read_urbs[index], mem_flags);
if (res) {
- if (res != -EPERM) {
+ if (res != -EPERM && res != -ENODEV) {
dev_err(&port->dev,
"%s - usb_submit_urb failed: %d\n",
__func__, res);
--
2.1.4
--
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