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SubjectRe: [PATCH] [PATCH] [v3] wireless: Initial driver submission for pureLiFi STA devices
Hi Srinivasan,

I love your patch! Perhaps something to improve:

[auto build test WARNING on wireless-drivers-next/master]
[also build test WARNING on wireless-drivers/master net-next/master net/master linus/master v5.9 next-20201013]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Srinivasan-Raju/wireless-Initial-driver-submission-for-pureLiFi-STA-devices/20201014-142216
base: https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next.git master
config: arc-allyesconfig (attached as .config)
compiler: arceb-elf-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/2f1cd7604f364eba9428b88e2ab38c2a42272fcd
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Srinivasan-Raju/wireless-Initial-driver-submission-for-pureLiFi-STA-devices/20201014-142216
git checkout 2f1cd7604f364eba9428b88e2ab38c2a42272fcd
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/net/wireless/purelifi/usb.c:74:6: warning: no previous prototype for 'send_packet_from_data_queue' [-Wmissing-prototypes]
74 | void send_packet_from_data_queue(struct purelifi_usb *usb)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/wireless/purelifi/usb.c: In function 'rx_urb_complete':
>> drivers/net/wireless/purelifi/usb.c:124:26: warning: variable 'rx' set but not used [-Wunused-but-set-variable]
124 | struct purelifi_usb_rx *rx;
| ^~
drivers/net/wireless/purelifi/usb.c: In function 'tx_urb_complete':
>> drivers/net/wireless/purelifi/usb.c:416:26: warning: variable 'tx' set but not used [-Wunused-but-set-variable]
416 | struct purelifi_usb_tx *tx;
| ^~
drivers/net/wireless/purelifi/usb.c: In function 'purelifi_store_frequency':
>> drivers/net/wireless/purelifi/usb.c:1101:9: warning: variable 'r' set but not used [-Wunused-but-set-variable]
1101 | int i, r, row, col, predivider, feedback_divider, output_div_0;
| ^
drivers/net/wireless/purelifi/usb.c: At top level:
>> drivers/net/wireless/purelifi/usb.c:1544:9: warning: no previous prototype for 'modulation_write' [-Wmissing-prototypes]
1544 | ssize_t modulation_write(struct file *file_p,
| ^~~~~~~~~~~~~~~~
--
drivers/net/wireless/purelifi/mac.c: In function 'purelifi_restore_settings':
>> drivers/net/wireless/purelifi/mac.c:137:26: warning: variable 'multicast_hash' set but not used [-Wunused-but-set-variable]
137 | struct purelifi_mc_hash multicast_hash;
| ^~~~~~~~~~~~~~
drivers/net/wireless/purelifi/mac.c: In function 'purelifi_mac_tx_status':
>> drivers/net/wireless/purelifi/mac.c:190:19: warning: variable 'retry' set but not used [-Wunused-but-set-variable]
190 | int success = 1, retry = 1;
| ^~~~~
drivers/net/wireless/purelifi/mac.c: In function 'purelifi_op_configure_filter':
>> drivers/net/wireless/purelifi/mac.c:656:6: warning: variable 'r' set but not used [-Wunused-but-set-variable]
656 | int r;
| ^

vim +/send_packet_from_data_queue +74 drivers/net/wireless/purelifi/usb.c

73
> 74 void send_packet_from_data_queue(struct purelifi_usb *usb)
75 {
76 struct sk_buff *skb = NULL;
77 unsigned long flags;
78 static u8 sidx;
79 u8 last_served_sidx;
80
81 spin_lock_irqsave(&usb->tx.lock, flags);
82 last_served_sidx = sidx;
83 do {
84 sidx = (sidx + 1) % MAX_STA_NUM;
85 if ((usb->tx.station[sidx].flag &
86 STATION_CONNECTED_FLAG)) {
87 if (!(usb->tx.station[sidx].flag &
88 STATION_FIFO_FULL_FLAG)) {
89 skb = skb_peek(&usb->tx.station
90 [sidx].data_list);
91 }
92 }
93 } while ((sidx != last_served_sidx) && (!skb));
94
95 if (skb) {
96 skb = skb_dequeue(&usb->tx.station[sidx].data_list);
97 usb_write_req_async(usb, skb->data, skb->len, USB_REQ_DATA_TX,
98 tx_urb_complete, skb);
99 if (skb_queue_len(&usb->tx.station[sidx].data_list)
100 <= 60) {
101 block_queue(usb, usb->tx.station[sidx].mac,
102 false);
103 }
104 }
105 spin_unlock_irqrestore(&usb->tx.lock, flags);
106 }
107
108 static void handle_rx_packet(struct purelifi_usb *usb, const u8 *buffer,
109 unsigned int length)
110 {
111 purelifi_mac_rx(purelifi_usb_to_hw(usb), buffer, length);
112 }
113
114 #define STATION_FIFO_ALMOST_FULL_MESSAGE 0
115 #define STATION_FIFO_ALMOST_FULL_NOT_MESSAGE 1
116 #define STATION_CONNECT_MESSAGE 2
117 #define STATION_DISCONNECT_MESSAGE 3
118
119 int rx_usb_enabled;
120 static void rx_urb_complete(struct urb *urb)
121 {
122 int r;
123 struct purelifi_usb *usb;
> 124 struct purelifi_usb_rx *rx;
125 struct purelifi_usb_tx *tx;
126 const u8 *buffer;
127 static u8 fpga_link_connection_f;
128 unsigned int length;
129 u16 status;
130 u8 sidx;
131
132 if (!urb) {
133 dev_err(purelifi_usb_dev(usb), "urb is NULL.\n");
134 return;
135 } else if (!urb->context) {
136 dev_err(purelifi_usb_dev(usb), "urb ctx is NULL.\n");
137 return;
138 }
139 usb = urb->context;
140
141 if (usb->initialized != 1)
142 return;
143
144 switch (urb->status) {
145 case 0:
146 break;
147 case -ESHUTDOWN:
148 case -EINVAL:
149 case -ENODEV:
150 case -ENOENT:
151 case -ECONNRESET:
152 case -EPIPE:
153 dev_dbg(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
154 return;
155 default:
156 dev_dbg(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
157 goto resubmit;
158 }
159
160 buffer = urb->transfer_buffer;
161 length = (*(u32 *)(buffer + sizeof(struct rx_status))) + sizeof(u32);
162
163 rx = &usb->rx;
164 tx = &usb->tx;
165
166 if (urb->actual_length != 8) {
167 if (usb->initialized && fpga_link_connection_f)
168 handle_rx_packet(usb, buffer, length);
169 goto resubmit;
170 }
171
172 status = buffer[7];
173
174 dev_info(&usb->intf->dev, "Recv status=%u\n", status);
175 dev_info(&usb->intf->dev, "Tx packet MAC=%x:%x:%x:%x:%x:%x\n",
176 buffer[0], buffer[1], buffer[2], buffer[3],
177 buffer[4], buffer[5]);
178
179 switch (status) {
180 case STATION_FIFO_ALMOST_FULL_NOT_MESSAGE:
181 dev_info(&usb->intf->dev,
182 "FIFO full not packet receipt.\n");
183 tx->mac_fifo_full = 1;
184 for (sidx = 0; sidx < MAX_STA_NUM; sidx++) {
185 usb->tx.station[sidx].flag |=
186 STATION_FIFO_FULL_FLAG;
187 }
188 break;
189 case STATION_FIFO_ALMOST_FULL_MESSAGE:
190 dev_info(&usb->intf->dev, "FIFO full packet receipt.\n");
191
192 for (sidx = 0; sidx < MAX_STA_NUM; sidx++)
193 usb->tx.station[sidx].flag &= 0xFD;
194
195 send_packet_from_data_queue(usb);
196 break;
197 case STATION_CONNECT_MESSAGE:
198 fpga_link_connection_f = 1;
199 dev_info(&usb->intf->dev, "ST_CONNECT_MSG packet receipt.\n");
200 break;
201 case STATION_DISCONNECT_MESSAGE:
202 fpga_link_connection_f = 0;
203 dev_info(&usb->intf->dev, "ST_DISCONN_MSG packet receipt.\n");
204 break;
205 default:
206 dev_info(&usb->intf->dev, "Unknown packet receipt.\n");
207 break;
208 }
209
210 resubmit:
211 r = usb_submit_urb(urb, GFP_ATOMIC);
212 if (r)
213 dev_dbg(urb_dev(urb), "urb %p resubmit error %d\n", urb, r);
214 }
215

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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