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| author | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> | 2018-09-16 16:45:43 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-25 20:21:02 +0200 |
| commit | 0e321f19be94448ca0375e2e0cc28a5f3950e9bb (patch) | |
| tree | 00abdb3b59247c7b538f78f50ce58adecdf344f4 | |
| parent | 94fe5f2b45c4108885e4b71f6b181068632ec904 (diff) | |
| download | lwn-0e321f19be94448ca0375e2e0cc28a5f3950e9bb.tar.gz lwn-0e321f19be94448ca0375e2e0cc28a5f3950e9bb.zip | |
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 <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/slimbus/qcom-ngd-ctrl.c | 4 |
1 files changed, 4 insertions, 0 deletions
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; |