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Subject[PATCH v2 1/2] usb: serial: handle -EPROTO quietly in generic_read_bulk
Date
If a USB serial device driver, which is built using the generic serial
driver, is unplugged while there is an active program using the device,
it will spam the logs with -EPROTO (71) messages as it attempts to
retry.

Most serial usb drivers (metro-usb, pl2303, mos7840, ...) only output
these messages for debugging. The generic driver treats these as
errors.

Change the default output for the generic serial driver from error to
debug.

Signed-off-by: Jeremiah Mahler <jmmahler@gmail.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 1bd1922..2d7207b 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -373,7 +373,7 @@ void usb_serial_generic_read_bulk_callback(struct urb *urb)
__func__, urb->status);
return;
default:
- dev_err(&port->dev, "%s - nonzero urb status: %d\n",
+ dev_dbg(&port->dev, "%s - nonzero urb status: %d\n",
__func__, urb->status);
goto resubmit;
}
--
2.1.3


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