USB: cxacru: ignore error trying to start ADSL in atm_start

The sysfs adsl_status attribute ignores (aside from returning -EIO to the
user) any error sending a START/STOP command to the device and there is at
least one firmware which never sends a response but appears to work
regardless.  Therefore atm_start should also continue if an error is received
so that such firmware is usable.

The official Conexant driver doesn't expect a reply either but this is for
another device (E2 router) and a commonly used firmware does respond.

Also, there is no point in changing -ECONNRESET to -ETIMEDOUT since nothing
ever checks for either of these values.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Cc: Duncan Sands <duncan.sands@math.u-psud.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 6 deletions

diff --git a/drivers/usb/atm/cxacru.c b/drivers/usb/atm/cxacru.c
index 68cf582fd4fa..8bcf7fe1dd80 100644
--- a/drivers/usb/atm/cxacru.c
+++ b/drivers/usb/atm/cxacru.c
@@ -476,8 +476,6 @@ static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
         add_timer(&timer);
         wait_for_completion(done);
         status = urb->status;
-        if (status == -ECONNRESET)
-                status = -ETIMEDOUT;
         del_timer_sync(&timer);
 
         if (actual_length)
@@ -671,11 +669,8 @@ static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
         /* start ADSL */
         mutex_lock(&instance->adsl_state_serialize);
         ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
-        if (ret < 0) {
+        if (ret < 0)
                 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
-                mutex_unlock(&instance->adsl_state_serialize);
-                return ret;
-        }
 
         /* Start status polling */
         mutex_lock(&instance->poll_state_serialize);