From: Gerhard Sittig <redacted>
Date: Fri, 9 Feb 2018 17:48:29 +0000 (+0100)
Subject: fx2lafw: silence "NULL dereference" compiler warning
X-Git-Url: https://sigrok.org/gitweb/?p=libsigrok.git;a=commitdiff_plain;h=0d1c51f57f31baeb3a05f511728129351f9655fd

fx2lafw: silence "NULL dereference" compiler warning

Check pointers' validity before dereferencing them.

This was reported by clang's scan-build.
---

diff --git a/src/hardware/fx2lafw/api.c b/src/hardware/fx2lafw/api.c
index a2de010a..adae8045 100644
--- a/src/hardware/fx2lafw/api.c
+++ b/src/hardware/fx2lafw/api.c
@@ -540,6 +540,8 @@ static int config_list(uint32_t key, GVariant **data,
 	case SR_CONF_DEVICE_OPTIONS:
 		return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 	case SR_CONF_SAMPLERATE:
+		if (!devc)
+			return SR_ERR_NA;
 		*data = std_gvar_samplerates(devc->samplerates, devc->num_samplerates);
 		break;
 	case SR_CONF_TRIGGER_MATCH: