Re: [PATCH] staging: fwserial: replace 'a' with '(a)' to avoid precedence issues

From: kbuild test robot
Date: Tue Feb 14 2017 - 15:28:28 EST

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Hi Arushi,

[auto build test ERROR on staging/staging-testing]
[also build test ERROR on v4.10-rc8 next-20170214]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Arushi-Singhal/staging-fwserial-replace-a-with-a-to-avoid-precedence-issues/20170215-020955
config: i386-randconfig-s0-02131304 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

All error/warnings (new ones prefixed by >>):

>> drivers/staging/fwserial/fwserial.c:101:19: error: "(" may not appear in macro parameter list
#define to_device((a), b) (a->b)
^
In file included from drivers/staging/fwserial/fwserial.c:21:0:
drivers/staging/fwserial/fwserial.c: In function 'fwtty_log_tx_error':
>> drivers/staging/fwserial/fwserial.c:111:22: error: implicit declaration of function 'to_device' [-Werror=implicit-function-declaration]
dev_err_ratelimited(to_device(p, device), fmt, ##__VA_ARGS__)
^
include/linux/device.h:1364:13: note: in definition of macro 'dev_level_ratelimited'
dev_level(dev, fmt, ##__VA_ARGS__); \
^~~
>> drivers/staging/fwserial/fwserial.c:111:2: note: in expansion of macro 'dev_err_ratelimited'
dev_err_ratelimited(to_device(p, device), fmt, ##__VA_ARGS__)
^~~~~~~~~~~~~~~~~~~
>> drivers/staging/fwserial/fwserial.c:201:3: note: in expansion of macro 'fwtty_err_ratelimited'
fwtty_err_ratelimited(port, "card busy\n");
^~~~~~~~~~~~~~~~~~~~~
>> drivers/staging/fwserial/fwserial.c:111:35: error: 'device' undeclared (first use in this function)
dev_err_ratelimited(to_device(p, device), fmt, ##__VA_ARGS__)
^
include/linux/device.h:1364:13: note: in definition of macro 'dev_level_ratelimited'
dev_level(dev, fmt, ##__VA_ARGS__); \
^~~
>> drivers/staging/fwserial/fwserial.c:111:2: note: in expansion of macro 'dev_err_ratelimited'
dev_err_ratelimited(to_device(p, device), fmt, ##__VA_ARGS__)
^~~~~~~~~~~~~~~~~~~
>> drivers/staging/fwserial/fwserial.c:201:3: note: in expansion of macro 'fwtty_err_ratelimited'
fwtty_err_ratelimited(port, "card busy\n");
^~~~~~~~~~~~~~~~~~~~~
drivers/staging/fwserial/fwserial.c:111:35: note: each undeclared identifier is reported only once for each function it appears in
dev_err_ratelimited(to_device(p, device), fmt, ##__VA_ARGS__)
^
include/linux/device.h:1364:13: note: in definition of macro 'dev_level_ratelimited'
dev_level(dev, fmt, ##__VA_ARGS__); \
^~~
>> drivers/staging/fwserial/fwserial.c:111:2: note: in expansion of macro 'dev_err_ratelimited'
dev_err_ratelimited(to_device(p, device), fmt, ##__VA_ARGS__)
^~~~~~~~~~~~~~~~~~~
>> drivers/staging/fwserial/fwserial.c:201:3: note: in expansion of macro 'fwtty_err_ratelimited'
fwtty_err_ratelimited(port, "card busy\n");
^~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/printk.h:320:0,
from include/linux/kernel.h:13,
from include/linux/sched.h:17,
from drivers/staging/fwserial/fwserial.c:19:
drivers/staging/fwserial/fwserial.c: In function '__fwtty_restart_tx':
drivers/staging/fwserial/fwserial.c:109:23: error: 'device' undeclared (first use in this function)
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^
include/linux/dynamic_debug.h:134:34: note: in definition of macro 'dynamic_dev_dbg'
__dynamic_dev_dbg(&descriptor, dev, fmt, \
^~~
>> drivers/staging/fwserial/fwserial.c:109:2: note: in expansion of macro 'dev_dbg'
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^~~~~~~
>> drivers/staging/fwserial/fwserial.c:290:2: note: in expansion of macro 'fwtty_dbg'
fwtty_dbg(port, "fifo len: %d avail: %d\n", len, avail);
^~~~~~~~~
drivers/staging/fwserial/fwserial.c: In function 'fwtty_update_port_status':
drivers/staging/fwserial/fwserial.c:109:23: error: 'device' undeclared (first use in this function)
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^
include/linux/dynamic_debug.h:134:34: note: in definition of macro 'dynamic_dev_dbg'
__dynamic_dev_dbg(&descriptor, dev, fmt, \
^~~
>> drivers/staging/fwserial/fwserial.c:109:2: note: in expansion of macro 'dev_dbg'
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^~~~~~~
drivers/staging/fwserial/fwserial.c:327:2: note: in expansion of macro 'fwtty_dbg'
fwtty_dbg(port, "status: %x delta: %x\n", status, delta);
^~~~~~~~~
drivers/staging/fwserial/fwserial.c: In function 'fwtty_emit_breaks':
drivers/staging/fwserial/fwserial.c:109:23: error: 'device' undeclared (first use in this function)
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^
include/linux/dynamic_debug.h:134:34: note: in definition of macro 'dynamic_dev_dbg'
__dynamic_dev_dbg(&descriptor, dev, fmt, \
^~~
>> drivers/staging/fwserial/fwserial.c:109:2: note: in expansion of macro 'dev_dbg'
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^~~~~~~
drivers/staging/fwserial/fwserial.c:523:2: note: in expansion of macro 'fwtty_dbg'
fwtty_dbg(port, "sending %d brks\n", n);
^~~~~~~~~
drivers/staging/fwserial/fwserial.c: In function 'fwtty_rx':
drivers/staging/fwserial/fwserial.c:109:23: error: 'device' undeclared (first use in this function)
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^
include/linux/dynamic_debug.h:134:34: note: in definition of macro 'dynamic_dev_dbg'
__dynamic_dev_dbg(&descriptor, dev, fmt, \
^~~
>> drivers/staging/fwserial/fwserial.c:109:2: note: in expansion of macro 'dev_dbg'
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^~~~~~~
drivers/staging/fwserial/fwserial.c:547:2: note: in expansion of macro 'fwtty_dbg'
fwtty_dbg(port, "%d\n", n);
^~~~~~~~~
In file included from drivers/staging/fwserial/fwserial.c:21:0:
drivers/staging/fwserial/fwserial.c: In function 'fwtty_port_handler':
>> drivers/staging/fwserial/fwserial.c:111:35: error: 'device' undeclared (first use in this function)
dev_err_ratelimited(to_device(p, device), fmt, ##__VA_ARGS__)
^
include/linux/device.h:1364:13: note: in definition of macro 'dev_level_ratelimited'
dev_level(dev, fmt, ##__VA_ARGS__); \
^~~
>> drivers/staging/fwserial/fwserial.c:111:2: note: in expansion of macro 'dev_err_ratelimited'
dev_err_ratelimited(to_device(p, device), fmt, ##__VA_ARGS__)
^~~~~~~~~~~~~~~~~~~
drivers/staging/fwserial/fwserial.c:630:3: note: in expansion of macro 'fwtty_err_ratelimited'
fwtty_err_ratelimited(port, "ignoring unauthenticated data\n");
^~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/printk.h:320:0,
from include/linux/kernel.h:13,
from include/linux/sched.h:17,
from drivers/staging/fwserial/fwserial.c:19:
drivers/staging/fwserial/fwserial.c: In function 'fwtty_tx_complete':
drivers/staging/fwserial/fwserial.c:109:23: error: 'device' undeclared (first use in this function)
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^
include/linux/dynamic_debug.h:134:34: note: in definition of macro 'dynamic_dev_dbg'
__dynamic_dev_dbg(&descriptor, dev, fmt, \
^~~
>> drivers/staging/fwserial/fwserial.c:109:2: note: in expansion of macro 'dev_dbg'
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^~~~~~~
drivers/staging/fwserial/fwserial.c:687:2: note: in expansion of macro 'fwtty_dbg'
fwtty_dbg(port, "rcode: %d\n", rcode);
^~~~~~~~~
drivers/staging/fwserial/fwserial.c: In function 'fwtty_tx':
drivers/staging/fwserial/fwserial.c:109:23: error: 'device' undeclared (first use in this function)
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^
include/linux/dynamic_debug.h:134:34: note: in definition of macro 'dynamic_dev_dbg'
__dynamic_dev_dbg(&descriptor, dev, fmt, \
^~~
>> drivers/staging/fwserial/fwserial.c:109:2: note: in expansion of macro 'dev_dbg'
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^~~~~~~
drivers/staging/fwserial/fwserial.c:750:3: note: in expansion of macro 'fwtty_dbg'
fwtty_dbg(port, "out: %u rem: %d\n", txn->dma_pended.len, n);
^~~~~~~~~
drivers/staging/fwserial/fwserial.c: In function 'fwtty_write_xchar':
drivers/staging/fwserial/fwserial.c:109:23: error: 'device' undeclared (first use in this function)
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^
include/linux/dynamic_debug.h:134:34: note: in definition of macro 'dynamic_dev_dbg'
__dynamic_dev_dbg(&descriptor, dev, fmt, \
^~~
>> drivers/staging/fwserial/fwserial.c:109:2: note: in expansion of macro 'dev_dbg'
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^~~~~~~
drivers/staging/fwserial/fwserial.c:820:2: note: in expansion of macro 'fwtty_dbg'
fwtty_dbg(port, "%02x\n", ch);
^~~~~~~~~
drivers/staging/fwserial/fwserial.c: In function 'fwtty_port_dtr_rts':
drivers/staging/fwserial/fwserial.c:109:23: error: 'device' undeclared (first use in this function)
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^
include/linux/dynamic_debug.h:134:34: note: in definition of macro 'dynamic_dev_dbg'
__dynamic_dev_dbg(&descriptor, dev, fmt, \
^~~
>> drivers/staging/fwserial/fwserial.c:109:2: note: in expansion of macro 'dev_dbg'
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^~~~~~~
drivers/staging/fwserial/fwserial.c:905:2: note: in expansion of macro 'fwtty_dbg'
fwtty_dbg(port, "on/off: %d\n", on);
^~~~~~~~~
drivers/staging/fwserial/fwserial.c: In function 'fwtty_port_carrier_raised':
drivers/staging/fwserial/fwserial.c:109:23: error: 'device' undeclared (first use in this function)
dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
^
include/linux/dynamic_debug.h:134:34: note: in definition of macro 'dynamic_dev_dbg'
__dynamic_dev_dbg(&descriptor, dev, fmt, \
^~~

vim +101 drivers/staging/fwserial/fwserial.c

13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
> 19 #include <linux/sched.h>
20 #include <linux/slab.h>
> 21 #include <linux/device.h>
22 #include <linux/mod_devicetable.h>
23 #include <linux/rculist.h>
24 #include <linux/workqueue.h>
25 #include <linux/ratelimit.h>
26 #include <linux/bug.h>
27 #include <linux/uaccess.h>
28
29 #include "fwserial.h"
30
31 #define be32_to_u64(hi, lo) ((u64)be32_to_cpu(hi) << 32 | be32_to_cpu(lo))
32
33 #define LINUX_VENDOR_ID 0xd00d1eU /* same id used in card root directory */
34 #define FWSERIAL_VERSION 0x00e81cU /* must be unique within LINUX_VENDOR_ID */
35
36 /* configurable options */
37 static int num_ttys = 4; /* # of std ttys to create per fw_card */
38 /* - doubles as loopback port index */
39 static bool auto_connect = true; /* try to VIRT_CABLE to every peer */
40 static bool create_loop_dev = true; /* create a loopback device for each card */
41
42 module_param_named(ttys, num_ttys, int, 0644);
43 module_param_named(auto, auto_connect, bool, 0644);
44 module_param_named(loop, create_loop_dev, bool, 0644);
45
46 /*
47 * Threshold below which the tty is woken for writing
48 * - should be equal to WAKEUP_CHARS in drivers/tty/n_tty.c because
49 * even if the writer is woken, n_tty_poll() won't set POLLOUT until
50 * our fifo is below this level
51 */
52 #define WAKEUP_CHARS 256
53
54 /**
55 * fwserial_list: list of every fw_serial created for each fw_card
56 * See discussion in fwserial_probe.
57 */
58 static LIST_HEAD(fwserial_list);
59 static DEFINE_MUTEX(fwserial_list_mutex);
60
61 /**
62 * port_table: array of tty ports allocated to each fw_card
63 *
64 * tty ports are allocated during probe when an fw_serial is first
65 * created for a given fw_card. Ports are allocated in a contiguous block,
66 * each block consisting of 'num_ports' ports.
67 */
68 static struct fwtty_port *port_table[MAX_TOTAL_PORTS];
69 static DEFINE_MUTEX(port_table_lock);
70 static bool port_table_corrupt;
71 #define FWTTY_INVALID_INDEX MAX_TOTAL_PORTS
72
73 #define loop_idx(port) (((port)->index) / num_ports)
74 #define table_idx(loop) ((loop) * num_ports + num_ttys)
75
76 /* total # of tty ports created per fw_card */
77 static int num_ports;
78
79 /* slab used as pool for struct fwtty_transactions */
80 static struct kmem_cache *fwtty_txn_cache;
81
82 struct tty_driver *fwtty_driver;
83 static struct tty_driver *fwloop_driver;
84
85 static struct dentry *fwserial_debugfs;
86
87 struct fwtty_transaction;
88 typedef void (*fwtty_transaction_cb)(struct fw_card *card, int rcode,
89 void *data, size_t length,
90 struct fwtty_transaction *txn);
91
92 struct fwtty_transaction {
93 struct fw_transaction fw_txn;
94 fwtty_transaction_cb callback;
95 struct fwtty_port *port;
96 union {
97 struct dma_pending dma_pended;
98 };
99 };
100
> 101 #define to_device((a), b) (a->b)
102 #define fwtty_err(p, fmt, ...) \
103 dev_err(to_device(p, device), fmt, ##__VA_ARGS__)
104 #define fwtty_info(p, fmt, ...) \
105 dev_info(to_device(p, device), fmt, ##__VA_ARGS__)
106 #define fwtty_notice(p, fmt, ...) \
107 dev_notice(to_device(p, device), fmt, ##__VA_ARGS__)
108 #define fwtty_dbg(p, fmt, ...) \
> 109 dev_dbg(to_device(p, device), "%s: " fmt, __func__, ##__VA_ARGS__)
110 #define fwtty_err_ratelimited(p, fmt, ...) \
> 111 dev_err_ratelimited(to_device(p, device), fmt, ##__VA_ARGS__)
112
113 #ifdef DEBUG
114 static inline void debug_short_write(struct fwtty_port *port, int c, int n)
115 {
116 int avail;
117
118 if (n < c) {
119 spin_lock_bh(&port->lock);
120 avail = dma_fifo_avail(&port->tx_fifo);
121 spin_unlock_bh(&port->lock);
122 fwtty_dbg(port, "short write: avail:%d req:%d wrote:%d\n",
123 avail, c, n);
124 }
125 }
126 #else
127 #define debug_short_write(port, c, n)
128 #endif
129
130 static struct fwtty_peer *__fwserial_peer_by_node_id(struct fw_card *card,
131 int generation, int id);
132
133 #ifdef FWTTY_PROFILING
134
135 static void fwtty_profile_fifo(struct fwtty_port *port, unsigned int *stat)
136 {
137 spin_lock_bh(&port->lock);
138 fwtty_profile_data(stat, dma_fifo_avail(&port->tx_fifo));
139 spin_unlock_bh(&port->lock);
140 }
141
142 static void fwtty_dump_profile(struct seq_file *m, struct stats *stats)
143 {
144 /* for each stat, print sum of 0 to 2^k, then individually */
145 int k = 4;
146 unsigned int sum;
147 int j;
148 char t[10];
149
150 snprintf(t, 10, "< %d", 1 << k);
151 seq_printf(m, "\n%14s %6s", " ", t);
152 for (j = k + 1; j < DISTRIBUTION_MAX_INDEX; ++j)
153 seq_printf(m, "%6d", 1 << j);
154
155 ++k;
156 for (j = 0, sum = 0; j <= k; ++j)
157 sum += stats->reads[j];
158 seq_printf(m, "\n%14s: %6d", "reads", sum);
159 for (j = k + 1; j <= DISTRIBUTION_MAX_INDEX; ++j)
160 seq_printf(m, "%6d", stats->reads[j]);
161
162 for (j = 0, sum = 0; j <= k; ++j)
163 sum += stats->writes[j];
164 seq_printf(m, "\n%14s: %6d", "writes", sum);
165 for (j = k + 1; j <= DISTRIBUTION_MAX_INDEX; ++j)
166 seq_printf(m, "%6d", stats->writes[j]);
167
168 for (j = 0, sum = 0; j <= k; ++j)
169 sum += stats->txns[j];
170 seq_printf(m, "\n%14s: %6d", "txns", sum);
171 for (j = k + 1; j <= DISTRIBUTION_MAX_INDEX; ++j)
172 seq_printf(m, "%6d", stats->txns[j]);
173
174 for (j = 0, sum = 0; j <= k; ++j)
175 sum += stats->unthrottle[j];
176 seq_printf(m, "\n%14s: %6d", "avail @ unthr", sum);
177 for (j = k + 1; j <= DISTRIBUTION_MAX_INDEX; ++j)
178 seq_printf(m, "%6d", stats->unthrottle[j]);
179 }
180
181 #else
182 #define fwtty_profile_fifo(port, stat)
183 #define fwtty_dump_profile(m, stats)
184 #endif
185
186 /*
187 * Returns the max receive packet size for the given node
188 * Devices which are OHCI v1.0/ v1.1/ v1.2-draft or RFC 2734 compliant
189 * are required by specification to support max_rec of 8 (512 bytes) or more.
190 */
191 static inline int device_max_receive(struct fw_device *fw_device)
192 {
193 /* see IEEE 1394-2008 table 8-8 */
194 return min(2 << fw_device->max_rec, 4096);
195 }
196
197 static void fwtty_log_tx_error(struct fwtty_port *port, int rcode)
198 {
199 switch (rcode) {
200 case RCODE_SEND_ERROR:
> 201 fwtty_err_ratelimited(port, "card busy\n");
202 break;
203 case RCODE_ADDRESS_ERROR:
204 fwtty_err_ratelimited(port, "bad unit addr or write length\n");
205 break;
206 case RCODE_DATA_ERROR:
207 fwtty_err_ratelimited(port, "failed rx\n");
208 break;
209 case RCODE_NO_ACK:
210 fwtty_err_ratelimited(port, "missing ack\n");
211 break;
212 case RCODE_BUSY:
213 fwtty_err_ratelimited(port, "remote busy\n");
214 break;
215 default:
216 fwtty_err_ratelimited(port, "failed tx: %d\n", rcode);
217 }
218 }
219
220 static void fwtty_txn_constructor(void *this)
221 {
222 struct fwtty_transaction *txn = this;
223
224 init_timer(&txn->fw_txn.split_timeout_timer);
225 }
226
227 static void fwtty_common_callback(struct fw_card *card, int rcode,
228 void *payload, size_t len, void *cb_data)
229 {
230 struct fwtty_transaction *txn = cb_data;
231 struct fwtty_port *port = txn->port;
232
233 if (port && rcode != RCODE_COMPLETE)
234 fwtty_log_tx_error(port, rcode);
235 if (txn->callback)
236 txn->callback(card, rcode, payload, len, txn);
237 kmem_cache_free(fwtty_txn_cache, txn);
238 }
239
240 static int fwtty_send_data_async(struct fwtty_peer *peer, int tcode,
241 unsigned long long addr, void *payload,
242 size_t len, fwtty_transaction_cb callback,
243 struct fwtty_port *port)
244 {
245 struct fwtty_transaction *txn;
246 int generation;
247
248 txn = kmem_cache_alloc(fwtty_txn_cache, GFP_ATOMIC);
249 if (!txn)
250 return -ENOMEM;
251
252 txn->callback = callback;
253 txn->port = port;
254
255 generation = peer->generation;
256 smp_rmb();
257 fw_send_request(peer->serial->card, &txn->fw_txn, tcode,
258 peer->node_id, generation, peer->speed, addr, payload,
259 len, fwtty_common_callback, txn);
260 return 0;
261 }
262
263 static void fwtty_send_txn_async(struct fwtty_peer *peer,
264 struct fwtty_transaction *txn, int tcode,
265 unsigned long long addr, void *payload,
266 size_t len, fwtty_transaction_cb callback,
267 struct fwtty_port *port)
268 {
269 int generation;
270
271 txn->callback = callback;
272 txn->port = port;
273
274 generation = peer->generation;
275 smp_rmb();
276 fw_send_request(peer->serial->card, &txn->fw_txn, tcode,
277 peer->node_id, generation, peer->speed, addr, payload,
278 len, fwtty_common_callback, txn);
279 }
280
281 static void __fwtty_restart_tx(struct fwtty_port *port)
282 {
283 int len, avail;
284
285 len = dma_fifo_out_level(&port->tx_fifo);
286 if (len)
287 schedule_delayed_work(&port->drain, 0);
288 avail = dma_fifo_avail(&port->tx_fifo);
289
> 290 fwtty_dbg(port, "fifo len: %d avail: %d\n", len, avail);
291 }
292
293 static void fwtty_restart_tx(struct fwtty_port *port)

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