https://github.com/rockowitz/ddcutil/pull/502
From d6eeb92f0e537aba415b6abc28fe157626a7bef7 Mon Sep 17 00:00:00 2001
From: "Z. Liu" <zhixu.liu@gmail.com>
Date: Tue, 25 Feb 2025 22:24:23 +0800
Subject: [PATCH] fix error reported by clang 19
1. query_sysenv_i2c.c: error: variable 'busct' set but not used [-Werror,-Wunused-but-set-variable]
2. i2c_strategy_dispatcher.c: error: expression which evaluates to zero treated as a null pointer
Signed-off-by: Z. Liu <zhixu.liu@gmail.com>
---
src/app_sysenv/query_sysenv_i2c.c | 3 ---
src/i2c/i2c_strategy_dispatcher.c | 4 ++--
2 files changed, 2 insertions(+), 5 deletions(-)
diff --git a/src/app_sysenv/query_sysenv_i2c.c b/src/app_sysenv/query_sysenv_i2c.c
index 55f3424a..290b704b 100644
--- a/src/app_sysenv/query_sysenv_i2c.c
+++ b/src/app_sysenv/query_sysenv_i2c.c
@@ -275,11 +275,8 @@ void test_edid_read_variants(Env_Accumulator * accum) {
rpt_title("Testing EDID read alternatives...",depth);
sysenv_rpt_current_time(NULL, d1);
- int busct = 0;
-
for (int busno=0; busno < I2C_BUS_MAX; busno++) {
if (i2c_device_exists(busno)) {
- busct++;
rpt_nl();
rpt_vstring(d1, "Examining device /dev/i2c-%d...", busno);
diff --git a/src/i2c/i2c_strategy_dispatcher.c b/src/i2c/i2c_strategy_dispatcher.c
index ee435e6d..d6026526 100644
--- a/src/i2c/i2c_strategy_dispatcher.c
+++ b/src/i2c/i2c_strategy_dispatcher.c
@@ -188,7 +188,7 @@ Status_Errno_DDC invoke_i2c_writer(
hexstring_t(bytes_to_write, bytect));
// n. prior to gcc 11, declaration cannot immediately follow label
- I2C_IO_Strategy * strategy = I2C_IO_STRATEGY_NOT_SET;
+ I2C_IO_Strategy * strategy = NULL;
retry:
strategy = i2c_get_io_strategy();
DBGTRC_NOPREFIX(debug, TRACE_GROUP, "strategy = %s", strategy->strategy_name);
@@ -235,7 +235,7 @@ Status_Errno_DDC invoke_i2c_reader(
readbuf);
// n. prior to gcc 11, declaration cannot immediately follow label
- I2C_IO_Strategy * strategy = I2C_IO_STRATEGY_NOT_SET;
+ I2C_IO_Strategy * strategy = NULL;
retry:
strategy = i2c_get_io_strategy();
DBGTRC_NOPREFIX(debug, TRACE_GROUP, "strategy = %s", strategy->strategy_name);
--
2.45.2