[ethtool,4/5] ethtool: Fix compilation warning when pretty dump is disabled

Commit Message

Ido Schimmel Sept. 14, 2021, 11:27 a.m. UTC

From: Ido Schimmel <[e-mail]>

When pretty dump is disabled (i.e., configure --disable-pretty-dump),
gcc 11.2.1 emits the following warning:

ethtool.c: In function ‘dump_regs’:
ethtool.c:1160:31: warning: comparison is always false due to limited range of data type [-Wtype-limits]
 1160 |                 for (i = 0; i < ARRAY_SIZE(driver_list); i++)
      |                               ^

Fix it by avoiding iterating over 'driver_list' when pretty dump is
disabled.

Signed-off-by: Ido Schimmel <[e-mail]>
---
 ethtool.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

Patch

diff --git a/ethtool.c b/ethtool.c
index a6826e9f9e3f..46887c7263e1 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -1089,12 +1089,12 @@  static int parse_hkey(char **rss_hkey, u32 key_size,
 	return 0;
 }
 
+#ifdef ETHTOOL_ENABLE_PRETTY_DUMP
 static const struct {
 	const char *name;
 	int (*func)(struct ethtool_drvinfo *info, struct ethtool_regs *regs);
 
 } driver_list[] = {
-#ifdef ETHTOOL_ENABLE_PRETTY_DUMP
 	{ "8139cp", realtek_dump_regs },
 	{ "8139too", realtek_dump_regs },
 	{ "r8169", realtek_dump_regs },
@@ -1129,8 +1129,8 @@  static const struct {
 	{ "fec", fec_dump_regs },
 	{ "igc", igc_dump_regs },
 	{ "bnxt_en", bnxt_dump_regs },
-#endif
 };
+#endif
 
 void dump_hex(FILE *file, const u8 *data, int len, int offset)
 {
@@ -1149,14 +1149,15 @@  void dump_hex(FILE *file, const u8 *data, int len, int offset)
 static int dump_regs(int gregs_dump_raw, int gregs_dump_hex,
 		     struct ethtool_drvinfo *info, struct ethtool_regs *regs)
 {
-	unsigned int i;
-
 	if (gregs_dump_raw) {
 		fwrite(regs->data, regs->len, 1, stdout);
 		goto nested;
 	}
 
-	if (!gregs_dump_hex)
+#ifdef ETHTOOL_ENABLE_PRETTY_DUMP
+	if (!gregs_dump_hex) {
+		unsigned int i;
+
 		for (i = 0; i < ARRAY_SIZE(driver_list); i++)
 			if (!strncmp(driver_list[i].name, info->driver,
 				     ETHTOOL_BUSINFO_LEN)) {
@@ -1168,6 +1169,8 @@  static int dump_regs(int gregs_dump_raw, int gregs_dump_hex,
 				 */
 				break;
 			}
+	}
+#endif
 
 	dump_hex(stdout, regs->data, regs->len, 0);