From: Uwe Hermann <redacted>
Date: Wed, 8 Mar 2017 18:45:23 +0000 (+0100)
Subject: sr_scpi_hw_info_free(): Allow NULL as argument.
X-Git-Tag: libsigrok-0.5.0~91
X-Git-Url: http://sigrok.org/gitweb/?a=commitdiff_plain;h=7b365c47198890da8541a6daf04697c7c7ac88d4;p=libsigrok.git

sr_scpi_hw_info_free(): Allow NULL as argument.
---

diff --git a/src/hardware/hameg-hmo/api.c b/src/hardware/hameg-hmo/api.c
index 7bd0b8b4..89042da7 100644
--- a/src/hardware/hameg-hmo/api.c
+++ b/src/hardware/hameg-hmo/api.c
@@ -98,8 +98,7 @@ static struct sr_dev_inst *hmo_probe_serial_device(struct sr_scpi_dev_inst *scpi
 	return sdi;
 
 fail:
-	if (hw_info)
-		sr_scpi_hw_info_free(hw_info);
+	sr_scpi_hw_info_free(hw_info);
 	sr_dev_inst_free(sdi);
 	g_free(devc);
 
diff --git a/src/hardware/rohde-schwarz-sme-0x/api.c b/src/hardware/rohde-schwarz-sme-0x/api.c
index 9d8548ed..7b971b2b 100644
--- a/src/hardware/rohde-schwarz-sme-0x/api.c
+++ b/src/hardware/rohde-schwarz-sme-0x/api.c
@@ -144,8 +144,7 @@ static struct sr_dev_inst *rs_probe_serial_device(struct sr_scpi_dev_inst *scpi)
 	return sdi;
 
 fail:
-	if (hw_info)
-		sr_scpi_hw_info_free(hw_info);
+	sr_scpi_hw_info_free(hw_info);
 	sr_dev_inst_free(sdi);
 	g_free(devc);
 	return NULL;
diff --git a/src/hardware/yokogawa-dlm/api.c b/src/hardware/yokogawa-dlm/api.c
index e14e847d..bcc24898 100644
--- a/src/hardware/yokogawa-dlm/api.c
+++ b/src/hardware/yokogawa-dlm/api.c
@@ -109,8 +109,7 @@ static struct sr_dev_inst *probe_usbtmc_device(struct sr_scpi_dev_inst *scpi)
 	return sdi;
 
 fail:
-	if (hw_info)
-		sr_scpi_hw_info_free(hw_info);
+	sr_scpi_hw_info_free(hw_info);
 	sr_dev_inst_free(sdi);
 	g_free(devc);
 
diff --git a/src/scpi/scpi.c b/src/scpi/scpi.c
index a3a16ebd..9ea68b57 100644
--- a/src/scpi/scpi.c
+++ b/src/scpi/scpi.c
@@ -934,17 +934,17 @@ SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi,
 /**
  * Free a sr_scpi_hw_info struct.
  *
- * @param hw_info Pointer to the struct to free.
- *
- * This function is safe to call with a NULL pointer.
+ * @param hw_info Pointer to the struct to free. If NULL, this
+ *                function does nothing.
  */
 SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info)
 {
-	if (hw_info) {
-		g_free(hw_info->manufacturer);
-		g_free(hw_info->model);
-		g_free(hw_info->serial_number);
-		g_free(hw_info->firmware_version);
-		g_free(hw_info);
-	}
+	if (!hw_info)
+		return;
+
+	g_free(hw_info->manufacturer);
+	g_free(hw_info->model);
+	g_free(hw_info->serial_number);
+	g_free(hw_info->firmware_version);
+	g_free(hw_info);
 }