From 0e321f19be94448ca0375e2e0cc28a5f3950e9bb Mon Sep 17 00:00:00 2001 From: Srinivas Kandagatla Date: Sun, 16 Sep 2018 16:45:43 -0700 Subject: slimbus: ngd: validate logical address assigned by remote Validate logical address assigned by remote, in failure cases this value is all zeors. Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman --- drivers/slimbus/qcom-ngd-ctrl.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/slimbus') diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c index 986e8de4146a..7218fb963d0a 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; -- cgit