From: Srinivas Kandagatla srinivas.kandagatla@linaro.org
Validate logical address assigned by remote, in failure cases this value is all zeors.
Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org --- drivers/slimbus/qcom-ngd-ctrl.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c index 8be4d67..b9f2e3f 100644 --- a/drivers/slimbus/qcom-ngd-ctrl.c +++ b/drivers/slimbus/qcom-ngd-ctrl.c @@ -1004,6 +1004,7 @@ static int qcom_slim_ngd_get_laddr(struct slim_controller *ctrl, struct slim_eaddr *ea, u8 *laddr) { struct slim_val_inf msg = {0}; + u8 failed_ea[6] = {0, 0, 0, 0, 0, 0}; struct slim_msg_txn txn; u8 wbuf[10] = {0}; u8 rbuf[10] = {0}; @@ -1034,6 +1035,9 @@ static int qcom_slim_ngd_get_laddr(struct slim_controller *ctrl, return ret; }
+ if (!memcmp(rbuf, failed_ea, 6)) + return -ENXIO; + *laddr = rbuf[6];
return ret;