staging: nvec: Add battery quirk to ignore incomplete responses

The nvec_power system polls nvec for battery information. In some
cases, that part seems to be overloaded and unable to respond
fast in which case it sends an incomplete response. We need to
mark the transfer as completed, though, in order to prevent
endless retries which can kill nvec.

Signed-off-by: Julian Andres Klode <jak@jak-linux.org>
Acked-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/staging/nvec/nvec.c b/drivers/staging/nvec/nvec.c
index 8c01723d681..a80f9935a3e 100644
--- a/drivers/staging/nvec/nvec.c
+++ b/drivers/staging/nvec/nvec.c
@@ -446,6 +446,11 @@ static void nvec_rx_completed(struct nvec_chip *nvec)
 
                 nvec_msg_free(nvec, nvec->rx);
                 nvec->state = 0;
+
+                /* Battery quirk - Often incomplete, and likes to crash */
+                if (nvec->rx->data[0] == NVEC_BAT)
+                        complete(&nvec->ec_transfer);
+
                 return;
         }