From: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
Validate logical address assigned by remote, in failure cases this value
is all zeors.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
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;
--
2.9.3
