usb: cdc-wdm: Fix race between disconnect and debug messages

dev_dbg() and dev_err() cannot be used to report failures
that may have been caused by a device's removal

Signed-off-by: Oliver Neukum <neukum@b1-systems.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 940b17a..72e2eb0 100644 (file)
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -435,11 +435,8 @@ retry:
                spin_lock_irq(&desc->iuspin);
 
                if (desc->rerr) { /* read completed, error happened */
-                       int t = desc->rerr;
                        desc->rerr = 0;
                        spin_unlock_irq(&desc->iuspin);
-                       dev_err(&desc->intf->dev,
-                               "reading had resulted in %d\n", t);
                        rv = -EIO;
                        goto err;
                }
@@ -477,8 +474,6 @@ retry:
 
 err:
        mutex_unlock(&desc->lock);
-       if (rv < 0 && rv != -EAGAIN)
-               dev_err(&desc->intf->dev, "wdm_read: exit error\n");
        return rv;
 }