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From ce297bec23dd0054600678b4297f6e73ecdc540d Mon Sep 17 00:00:00 2001
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From: Michal Kubecek <mkubecek@suse.cz>
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Date: Sun, 23 Aug 2020 21:40:21 +0200
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Subject: [PATCH 04/17] ioctl: check presence of eeprom length argument
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properly
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In do_geeprom(), do_seprom() and do_getmodule(), check if user used
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"length" command line argument is done by setting the value to -1 before
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parsing and checking if it changed. This is quite ugly and also causes
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compiler warnings as the variable is u32.
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Use proper "seen" flag to let parser tell us if the argument was used.
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Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
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Reviewed-by: Andrew Lunn <andrew@lunn.ch>
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(cherry picked from commit 923c3f51c4442a5f25afb529bd49ec2ef4f185a3)
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---
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ethtool.c | 24 +++++++++++++++---------
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1 file changed, 15 insertions(+), 9 deletions(-)
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diff --git a/ethtool.c b/ethtool.c
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index c4ad186cd390..4fa7a2c1716f 100644
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--- a/ethtool.c
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+++ b/ethtool.c
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@@ -3184,10 +3184,12 @@ static int do_geeprom(struct cmd_context *ctx)
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int geeprom_changed = 0;
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int geeprom_dump_raw = 0;
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u32 geeprom_offset = 0;
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- u32 geeprom_length = -1;
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+ u32 geeprom_length = 0;
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+ int geeprom_length_seen = 0;
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struct cmdline_info cmdline_geeprom[] = {
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{ "offset", CMDL_U32, &geeprom_offset, NULL },
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- { "length", CMDL_U32, &geeprom_length, NULL },
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+ { "length", CMDL_U32, &geeprom_length, NULL,
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+ 0, &geeprom_length_seen },
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{ "raw", CMDL_BOOL, &geeprom_dump_raw, NULL },
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};
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int err;
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@@ -3204,7 +3206,7 @@ static int do_geeprom(struct cmd_context *ctx)
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return 74;
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}
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- if (geeprom_length == -1)
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+ if (!geeprom_length_seen)
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geeprom_length = drvinfo.eedump_len;
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if (drvinfo.eedump_len < geeprom_offset + geeprom_length)
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@@ -3234,14 +3236,16 @@ static int do_seeprom(struct cmd_context *ctx)
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{
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int seeprom_changed = 0;
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u32 seeprom_magic = 0;
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- u32 seeprom_length = -1;
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+ u32 seeprom_length = 0;
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u32 seeprom_offset = 0;
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u8 seeprom_value = 0;
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+ int seeprom_length_seen = 0;
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int seeprom_value_seen = 0;
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struct cmdline_info cmdline_seeprom[] = {
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{ "magic", CMDL_U32, &seeprom_magic, NULL },
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{ "offset", CMDL_U32, &seeprom_offset, NULL },
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- { "length", CMDL_U32, &seeprom_length, NULL },
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+ { "length", CMDL_U32, &seeprom_length, NULL,
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+ 0, &seeprom_length_seen },
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{ "value", CMDL_U8, &seeprom_value, NULL,
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0, &seeprom_value_seen },
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};
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@@ -3262,7 +3266,7 @@ static int do_seeprom(struct cmd_context *ctx)
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if (seeprom_value_seen)
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seeprom_length = 1;
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- if (seeprom_length == -1)
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+ if (!seeprom_length_seen)
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seeprom_length = drvinfo.eedump_len;
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if (drvinfo.eedump_len < seeprom_offset + seeprom_length) {
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@@ -4538,15 +4542,17 @@ static int do_getmodule(struct cmd_context *ctx)
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struct ethtool_modinfo modinfo;
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struct ethtool_eeprom *eeprom;
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u32 geeprom_offset = 0;
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- u32 geeprom_length = -1;
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+ u32 geeprom_length = 0;
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int geeprom_changed = 0;
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int geeprom_dump_raw = 0;
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int geeprom_dump_hex = 0;
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+ int geeprom_length_seen = 0;
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int err;
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struct cmdline_info cmdline_geeprom[] = {
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{ "offset", CMDL_U32, &geeprom_offset, NULL },
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- { "length", CMDL_U32, &geeprom_length, NULL },
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+ { "length", CMDL_U32, &geeprom_length, NULL,
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+ 0, &geeprom_length_seen },
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{ "raw", CMDL_BOOL, &geeprom_dump_raw, NULL },
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{ "hex", CMDL_BOOL, &geeprom_dump_hex, NULL },
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};
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@@ -4566,7 +4572,7 @@ static int do_getmodule(struct cmd_context *ctx)
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return 1;
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}
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- if (geeprom_length == -1)
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+ if (!geeprom_length_seen)
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geeprom_length = modinfo.eeprom_len;
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if (modinfo.eeprom_len < geeprom_offset + geeprom_length)
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--
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2.26.2
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