On Fri, Apr 28, 2017 at 04:41:33PM +0300, Dan Carpenter wrote: Adding Tobin to CC, he is way more into the driver than I am these days...
> Hello Wolfram Sang,
>
> The patch 13a9930d15b4: "staging: ks7010: add driver from Nanonote
> extra-repository" from May 31, 2016, leads to the following static
> checker warning:
>
> drivers/staging/ks7010/ks_wlan_net.c:1141 ks_wlan_get_range()
> warn: dead code because of 'i > 2' and 'i < 13'
>
> drivers/staging/ks7010/ks_wlan_net.c
> 1062 static int ks_wlan_get_range(struct net_device *dev,
> 1063 struct iw_request_info *info,
> 1064 struct iw_point *dwrq, char *extra)
> 1065 {
> 1066 struct ks_wlan_private *priv =
> 1067 (struct ks_wlan_private *)netdev_priv(dev);
> 1068 struct iw_range *range = (struct iw_range *)extra;
> 1069 int i, k;
> 1070
> 1071 DPRINTK(2, "\n");
> 1072
> 1073 if (priv->sleep_mode == SLP_SLEEP)
> 1074 return -EPERM;
> 1075
> 1076 /* for SLEEP MODE */
> 1077 dwrq->length = sizeof(struct iw_range);
> 1078 memset(range, 0, sizeof(*range));
> 1079 range->min_nwid = 0x0000;
> 1080 range->max_nwid = 0x0000;
> 1081 range->num_channels = 14;
> 1082 /* Should be based on cap_rid.country to give only
> 1083 * what the current card support
> 1084 */
> 1085 k = 0;
> 1086 for (i = 0; i < 13; i++) { /* channel 1 -- 13 */
> ^^^^^^
> 1087 range->freq[k].i = i + 1; /* List index */
> 1088 range->freq[k].m = frequency_list[i] * 100000;
> 1089 range->freq[k++].e = 1; /* Values in table in MHz ->
> * 10^5 * 10 */
> 1090 }
>
> i is always 13 after the loop.
>
> 1091 range->num_frequency = k;
> 1092 if (priv->reg.phy_type == D_11B_ONLY_MODE ||
> priv->reg.phy_type == D_11BG_COMPATIBLE_MODE) { /* channel 14 */
> 1093 range->freq[13].i = 14; /* List index */
> 1094 range->freq[13].m = frequency_list[13] * 100000;
> 1095 range->freq[13].e = 1; /* Values in table in MHz ->
> * 10^5 * 10 */
> 1096 range->num_frequency = 14;
> 1097 }
> 1098
> 1099 /* Hum... Should put the right values there */
> 1100 range->max_qual.qual = 100;
> 1101 range->max_qual.level = 256 - 128; /* 0 dBm? */
> 1102 range->max_qual.noise = 256 - 128;
> 1103 range->sensitivity = 1;
> 1104
> 1105 if (priv->reg.phy_type == D_11B_ONLY_MODE) {
> 1106 range->bitrate[0] = 1e6;
> 1107 range->bitrate[1] = 2e6;
> 1108 range->bitrate[2] = 5.5e6;
> 1109 range->bitrate[3] = 11e6;
> 1110 range->num_bitrates = 4;
> 1111 } else { /* D_11G_ONLY_MODE or D_11BG_COMPATIBLE_MODE
> */
> 1112 range->bitrate[0] = 1e6;
> 1113 range->bitrate[1] = 2e6;
> 1114 range->bitrate[2] = 5.5e6;
> 1115 range->bitrate[3] = 11e6;
> 1116
> 1117 range->bitrate[4] = 6e6;
> 1118 range->bitrate[5] = 9e6;
> 1119 range->bitrate[6] = 12e6;
> 1120 if (IW_MAX_BITRATES < 9) {
> 1121 range->bitrate[7] = 54e6;
> 1122 range->num_bitrates = 8;
> 1123 } else {
> 1124 range->bitrate[7] = 18e6;
> 1125 range->bitrate[8] = 24e6;
> 1126 range->bitrate[9] = 36e6;
> 1127 range->bitrate[10] = 48e6;
> 1128 range->bitrate[11] = 54e6;
> 1129
> 1130 range->num_bitrates = 12;
> 1131 }
> 1132 }
> 1133
> 1134 /* Set an indication of the max TCP throughput
> 1135 * in bit/s that we can expect using this interface.
> 1136 * May be use for QoS stuff... Jean II
> 1137 */
> 1138 if (i > 2)
> ^^^^^
> So this condition is always true. I'm not sure what was intended,
> though.
>
> 1139 range->throughput = 5000 * 1000;
> 1140 else
> 1141 range->throughput = 1500 * 1000;
> 1142
>
> regards,
> dan carpenter
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