From: Mike Walters <redacted>
Date: Sun, 14 Nov 2021 22:03:01 +0000 (+0000)
Subject: kingst-la2016: handle sdi==NULL in config_list
X-Git-Url: https://sigrok.org/gitweb/?p=libsigrok.git;a=commitdiff_plain;h=fb28e72dfdea0d985e03795f1f058aa4621e7e55

kingst-la2016: handle sdi==NULL in config_list

The hardware driver API specifies that the sdi argument to config_list
is optional and can be NULL. This change handles that case, instead of
dereferencing without a check.
---

diff --git a/src/hardware/kingst-la2016/api.c b/src/hardware/kingst-la2016/api.c
index 1b1b425a..216869ed 100644
--- a/src/hardware/kingst-la2016/api.c
+++ b/src/hardware/kingst-la2016/api.c
@@ -504,13 +504,14 @@ static int config_list(uint32_t key, GVariant **data,
 {
 	struct dev_context *devc;
 
-	devc = sdi->priv;
-
 	switch (key) {
 	case SR_CONF_SCAN_OPTIONS:
 	case SR_CONF_DEVICE_OPTIONS:
 		return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 	case SR_CONF_SAMPLERATE:
+		if (!sdi)
+			return SR_ERR_ARG;
+		devc = sdi->priv;
 		if (devc->max_samplerate == SR_MHZ(200)) {
 			*data = std_gvar_samplerates(ARRAY_AND_SIZE(samplerates_la2016));
 		}