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authorPete Zaitcev <zaitcev@redhat.com>2007-04-11 16:47:26 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2007-04-27 16:28:39 -0400
commitecb658d387dc09f344b3d755e8674076072032c7 (patch)
treeb24067478554d5514db22ca6b107b8258e22b7e3 /drivers/usb/mon
parent35d07fd58f47284adecf219d3b73e4ea197cf29f (diff)
usbmon: bus zero
Add the "bus zero" feature to the usbmon. If a user process specifies bus with number zero, it receives events from all buses. This is useful when we wish to see initial enumeration when a bus is created, typically after a modprobe. Until now, an application had to loop until a new bus could be open, then start capturing on it. This procedure was cumbersome and could lose initial events. Also, often it's too bothersome to find exactly to which bus a specific device is attached. Paolo Albeni provided the original concept implementation. I added the handling of "bus->monitored" flag and generally fixed it up. Signed-off-by: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/mon')
-rw-r--r--drivers/usb/mon/mon_bin.c14
-rw-r--r--drivers/usb/mon/mon_main.c158
-rw-r--r--drivers/usb/mon/mon_text.c23
-rw-r--r--drivers/usb/mon/usb_mon.h5
4 files changed, 116 insertions, 84 deletions
diff --git a/drivers/usb/mon/mon_bin.c b/drivers/usb/mon/mon_bin.c
index b2bedd974ac3..0af11a66207c 100644
--- a/drivers/usb/mon/mon_bin.c
+++ b/drivers/usb/mon/mon_bin.c
@@ -356,8 +356,10 @@ static inline char mon_bin_get_setup(unsigned char *setupb,
356 if (!usb_pipecontrol(urb->pipe) || ev_type != 'S') 356 if (!usb_pipecontrol(urb->pipe) || ev_type != 'S')
357 return '-'; 357 return '-';
358 358
359 if (urb->transfer_flags & URB_NO_SETUP_DMA_MAP) 359 if (urb->dev->bus->uses_dma &&
360 (urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) {
360 return mon_dmapeek(setupb, urb->setup_dma, SETUP_LEN); 361 return mon_dmapeek(setupb, urb->setup_dma, SETUP_LEN);
362 }
361 if (urb->setup_packet == NULL) 363 if (urb->setup_packet == NULL)
362 return 'Z'; 364 return 'Z';
363 365
@@ -369,7 +371,8 @@ static char mon_bin_get_data(const struct mon_reader_bin *rp,
369 unsigned int offset, struct urb *urb, unsigned int length) 371 unsigned int offset, struct urb *urb, unsigned int length)
370{ 372{
371 373
372 if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP) { 374 if (urb->dev->bus->uses_dma &&
375 (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) {
373 mon_dmapeek_vec(rp, offset, urb->transfer_dma, length); 376 mon_dmapeek_vec(rp, offset, urb->transfer_dma, length);
374 return 0; 377 return 0;
375 } 378 }
@@ -440,7 +443,7 @@ static void mon_bin_event(struct mon_reader_bin *rp, struct urb *urb,
440 /* We use the fact that usb_pipein() returns 0x80 */ 443 /* We use the fact that usb_pipein() returns 0x80 */
441 ep->epnum = usb_pipeendpoint(urb->pipe) | usb_pipein(urb->pipe); 444 ep->epnum = usb_pipeendpoint(urb->pipe) | usb_pipein(urb->pipe);
442 ep->devnum = usb_pipedevice(urb->pipe); 445 ep->devnum = usb_pipedevice(urb->pipe);
443 ep->busnum = rp->r.m_bus->u_bus->busnum; 446 ep->busnum = urb->dev->bus->busnum;
444 ep->id = (unsigned long) urb; 447 ep->id = (unsigned long) urb;
445 ep->ts_sec = ts.tv_sec; 448 ep->ts_sec = ts.tv_sec;
446 ep->ts_usec = ts.tv_usec; 449 ep->ts_usec = ts.tv_usec;
@@ -500,7 +503,7 @@ static void mon_bin_error(void *data, struct urb *urb, int error)
500 /* We use the fact that usb_pipein() returns 0x80 */ 503 /* We use the fact that usb_pipein() returns 0x80 */
501 ep->epnum = usb_pipeendpoint(urb->pipe) | usb_pipein(urb->pipe); 504 ep->epnum = usb_pipeendpoint(urb->pipe) | usb_pipein(urb->pipe);
502 ep->devnum = usb_pipedevice(urb->pipe); 505 ep->devnum = usb_pipedevice(urb->pipe);
503 ep->busnum = rp->r.m_bus->u_bus->busnum; 506 ep->busnum = urb->dev->bus->busnum;
504 ep->id = (unsigned long) urb; 507 ep->id = (unsigned long) urb;
505 ep->status = error; 508 ep->status = error;
506 509
@@ -515,7 +518,6 @@ static void mon_bin_error(void *data, struct urb *urb, int error)
515static int mon_bin_open(struct inode *inode, struct file *file) 518static int mon_bin_open(struct inode *inode, struct file *file)
516{ 519{
517 struct mon_bus *mbus; 520 struct mon_bus *mbus;
518 struct usb_bus *ubus;
519 struct mon_reader_bin *rp; 521 struct mon_reader_bin *rp;
520 size_t size; 522 size_t size;
521 int rc; 523 int rc;
@@ -525,7 +527,7 @@ static int mon_bin_open(struct inode *inode, struct file *file)
525 mutex_unlock(&mon_lock); 527 mutex_unlock(&mon_lock);
526 return -ENODEV; 528 return -ENODEV;
527 } 529 }
528 if ((ubus = mbus->u_bus) == NULL) { 530 if (mbus != &mon_bus0 && mbus->u_bus == NULL) {
529 printk(KERN_ERR TAG ": consistency error on open\n"); 531 printk(KERN_ERR TAG ": consistency error on open\n");
530 mutex_unlock(&mon_lock); 532 mutex_unlock(&mon_lock);
531 return -ENODEV; 533 return -ENODEV;
diff --git a/drivers/usb/mon/mon_main.c b/drivers/usb/mon/mon_main.c
index c9739e7b35e5..8a1df2c9c73e 100644
--- a/drivers/usb/mon/mon_main.c
+++ b/drivers/usb/mon/mon_main.c
@@ -16,8 +16,6 @@
16#include "usb_mon.h" 16#include "usb_mon.h"
17#include "../core/hcd.h" 17#include "../core/hcd.h"
18 18
19static void mon_submit(struct usb_bus *ubus, struct urb *urb);
20static void mon_complete(struct usb_bus *ubus, struct urb *urb);
21static void mon_stop(struct mon_bus *mbus); 19static void mon_stop(struct mon_bus *mbus);
22static void mon_dissolve(struct mon_bus *mbus, struct usb_bus *ubus); 20static void mon_dissolve(struct mon_bus *mbus, struct usb_bus *ubus);
23static void mon_bus_drop(struct kref *r); 21static void mon_bus_drop(struct kref *r);
@@ -25,6 +23,7 @@ static void mon_bus_init(struct usb_bus *ubus);
25 23
26DEFINE_MUTEX(mon_lock); 24DEFINE_MUTEX(mon_lock);
27 25
26struct mon_bus mon_bus0; /* Pseudo bus meaning "all buses" */
28static LIST_HEAD(mon_buses); /* All buses we know: struct mon_bus */ 27static LIST_HEAD(mon_buses); /* All buses we know: struct mon_bus */
29 28
30/* 29/*
@@ -35,22 +34,19 @@ static LIST_HEAD(mon_buses); /* All buses we know: struct mon_bus */
35void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r) 34void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r)
36{ 35{
37 unsigned long flags; 36 unsigned long flags;
38 struct usb_bus *ubus; 37 struct list_head *p;
39 38
40 spin_lock_irqsave(&mbus->lock, flags); 39 spin_lock_irqsave(&mbus->lock, flags);
41 if (mbus->nreaders == 0) { 40 if (mbus->nreaders == 0) {
42 ubus = mbus->u_bus; 41 if (mbus == &mon_bus0) {
43 if (ubus->monitored) { 42 list_for_each (p, &mon_buses) {
44 /* 43 struct mon_bus *m1;
45 * Something is really broken, refuse to go on and 44 m1 = list_entry(p, struct mon_bus, bus_link);
46 * possibly corrupt ops pointers or worse. 45 m1->u_bus->monitored = 1;
47 */ 46 }
48 printk(KERN_ERR TAG ": bus %d is already monitored\n", 47 } else {
49 ubus->busnum); 48 mbus->u_bus->monitored = 1;
50 spin_unlock_irqrestore(&mbus->lock, flags);
51 return;
52 } 49 }
53 ubus->monitored = 1;
54 } 50 }
55 mbus->nreaders++; 51 mbus->nreaders++;
56 list_add_tail(&r->r_link, &mbus->r_list); 52 list_add_tail(&r->r_link, &mbus->r_list);
@@ -80,77 +76,79 @@ void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r)
80 76
81/* 77/*
82 */ 78 */
83static void mon_submit(struct usb_bus *ubus, struct urb *urb) 79static void mon_bus_submit(struct mon_bus *mbus, struct urb *urb)
84{ 80{
85 struct mon_bus *mbus;
86 unsigned long flags; 81 unsigned long flags;
87 struct list_head *pos; 82 struct list_head *pos;
88 struct mon_reader *r; 83 struct mon_reader *r;
89 84
90 mbus = ubus->mon_bus;
91 if (mbus == NULL)
92 goto out_unlocked;
93
94 spin_lock_irqsave(&mbus->lock, flags); 85 spin_lock_irqsave(&mbus->lock, flags);
95 if (mbus->nreaders == 0)
96 goto out_locked;
97
98 mbus->cnt_events++; 86 mbus->cnt_events++;
99 list_for_each (pos, &mbus->r_list) { 87 list_for_each (pos, &mbus->r_list) {
100 r = list_entry(pos, struct mon_reader, r_link); 88 r = list_entry(pos, struct mon_reader, r_link);
101 r->rnf_submit(r->r_data, urb); 89 r->rnf_submit(r->r_data, urb);
102 } 90 }
103
104 spin_unlock_irqrestore(&mbus->lock, flags); 91 spin_unlock_irqrestore(&mbus->lock, flags);
105 return; 92 return;
93}
106 94
107out_locked: 95static void mon_submit(struct usb_bus *ubus, struct urb *urb)
108 spin_unlock_irqrestore(&mbus->lock, flags); 96{
109out_unlocked: 97 struct mon_bus *mbus;
110 return; 98
99 if ((mbus = ubus->mon_bus) != NULL)
100 mon_bus_submit(mbus, urb);
101 mon_bus_submit(&mon_bus0, urb);
111} 102}
112 103
113/* 104/*
114 */ 105 */
115static void mon_submit_error(struct usb_bus *ubus, struct urb *urb, int error) 106static void mon_bus_submit_error(struct mon_bus *mbus, struct urb *urb, int error)
116{ 107{
117 struct mon_bus *mbus;
118 unsigned long flags; 108 unsigned long flags;
119 struct list_head *pos; 109 struct list_head *pos;
120 struct mon_reader *r; 110 struct mon_reader *r;
121 111
122 mbus = ubus->mon_bus;
123 if (mbus == NULL)
124 goto out_unlocked;
125
126 spin_lock_irqsave(&mbus->lock, flags); 112 spin_lock_irqsave(&mbus->lock, flags);
127 if (mbus->nreaders == 0)
128 goto out_locked;
129
130 mbus->cnt_events++; 113 mbus->cnt_events++;
131 list_for_each (pos, &mbus->r_list) { 114 list_for_each (pos, &mbus->r_list) {
132 r = list_entry(pos, struct mon_reader, r_link); 115 r = list_entry(pos, struct mon_reader, r_link);
133 r->rnf_error(r->r_data, urb, error); 116 r->rnf_error(r->r_data, urb, error);
134 } 117 }
135
136 spin_unlock_irqrestore(&mbus->lock, flags); 118 spin_unlock_irqrestore(&mbus->lock, flags);
137 return; 119 return;
120}
138 121
139out_locked: 122static void mon_submit_error(struct usb_bus *ubus, struct urb *urb, int error)
140 spin_unlock_irqrestore(&mbus->lock, flags); 123{
141out_unlocked: 124 struct mon_bus *mbus;
142 return; 125
126 if ((mbus = ubus->mon_bus) != NULL)
127 mon_bus_submit_error(mbus, urb, error);
128 mon_bus_submit_error(&mon_bus0, urb, error);
143} 129}
144 130
145/* 131/*
146 */ 132 */
147static void mon_complete(struct usb_bus *ubus, struct urb *urb) 133static void mon_bus_complete(struct mon_bus *mbus, struct urb *urb)
148{ 134{
149 struct mon_bus *mbus;
150 unsigned long flags; 135 unsigned long flags;
151 struct list_head *pos; 136 struct list_head *pos;
152 struct mon_reader *r; 137 struct mon_reader *r;
153 138
139 spin_lock_irqsave(&mbus->lock, flags);
140 mbus->cnt_events++;
141 list_for_each (pos, &mbus->r_list) {
142 r = list_entry(pos, struct mon_reader, r_link);
143 r->rnf_complete(r->r_data, urb);
144 }
145 spin_unlock_irqrestore(&mbus->lock, flags);
146}
147
148static void mon_complete(struct usb_bus *ubus, struct urb *urb)
149{
150 struct mon_bus *mbus;
151
154 mbus = ubus->mon_bus; 152 mbus = ubus->mon_bus;
155 if (mbus == NULL) { 153 if (mbus == NULL) {
156 /* 154 /*
@@ -162,13 +160,8 @@ static void mon_complete(struct usb_bus *ubus, struct urb *urb)
162 return; 160 return;
163 } 161 }
164 162
165 spin_lock_irqsave(&mbus->lock, flags); 163 mon_bus_complete(mbus, urb);
166 mbus->cnt_events++; 164 mon_bus_complete(&mon_bus0, urb);
167 list_for_each (pos, &mbus->r_list) {
168 r = list_entry(pos, struct mon_reader, r_link);
169 r->rnf_complete(r->r_data, urb);
170 }
171 spin_unlock_irqrestore(&mbus->lock, flags);
172} 165}
173 166
174/* int (*unlink_urb) (struct urb *urb, int status); */ 167/* int (*unlink_urb) (struct urb *urb, int status); */
@@ -179,14 +172,26 @@ static void mon_complete(struct usb_bus *ubus, struct urb *urb)
179static void mon_stop(struct mon_bus *mbus) 172static void mon_stop(struct mon_bus *mbus)
180{ 173{
181 struct usb_bus *ubus = mbus->u_bus; 174 struct usb_bus *ubus = mbus->u_bus;
175 struct list_head *p;
182 176
183 /* 177 if (mbus == &mon_bus0) {
184 * A stop can be called for a dissolved mon_bus in case of 178 list_for_each (p, &mon_buses) {
185 * a reader staying across an rmmod foo_hcd. 179 mbus = list_entry(p, struct mon_bus, bus_link);
186 */ 180 /*
187 if (ubus != NULL) { 181 * We do not change nreaders here, so rely on mon_lock.
188 ubus->monitored = 0; 182 */
189 mb(); 183 if (mbus->nreaders == 0 && (ubus = mbus->u_bus) != NULL)
184 ubus->monitored = 0;
185 }
186 } else {
187 /*
188 * A stop can be called for a dissolved mon_bus in case of
189 * a reader staying across an rmmod foo_hcd, so test ->u_bus.
190 */
191 if (mon_bus0.nreaders == 0 && (ubus = mbus->u_bus) != NULL) {
192 ubus->monitored = 0;
193 mb();
194 }
190 } 195 }
191} 196}
192 197
@@ -199,6 +204,10 @@ static void mon_stop(struct mon_bus *mbus)
199static void mon_bus_add(struct usb_bus *ubus) 204static void mon_bus_add(struct usb_bus *ubus)
200{ 205{
201 mon_bus_init(ubus); 206 mon_bus_init(ubus);
207 mutex_lock(&mon_lock);
208 if (mon_bus0.nreaders != 0)
209 ubus->monitored = 1;
210 mutex_unlock(&mon_lock);
202} 211}
203 212
204/* 213/*
@@ -250,12 +259,7 @@ static struct usb_mon_operations mon_ops_0 = {
250static void mon_dissolve(struct mon_bus *mbus, struct usb_bus *ubus) 259static void mon_dissolve(struct mon_bus *mbus, struct usb_bus *ubus)
251{ 260{
252 261
253 /*
254 * Never happens, but...
255 */
256 if (ubus->monitored) { 262 if (ubus->monitored) {
257 printk(KERN_ERR TAG ": bus %d is dissolved while monitored\n",
258 ubus->busnum);
259 ubus->monitored = 0; 263 ubus->monitored = 0;
260 mb(); 264 mb();
261 } 265 }
@@ -263,6 +267,8 @@ static void mon_dissolve(struct mon_bus *mbus, struct usb_bus *ubus)
263 ubus->mon_bus = NULL; 267 ubus->mon_bus = NULL;
264 mbus->u_bus = NULL; 268 mbus->u_bus = NULL;
265 mb(); 269 mb();
270
271 /* We want synchronize_irq() here, but that needs an argument. */
266} 272}
267 273
268/* 274/*
@@ -295,9 +301,8 @@ static void mon_bus_init(struct usb_bus *ubus)
295 */ 301 */
296 mbus->u_bus = ubus; 302 mbus->u_bus = ubus;
297 ubus->mon_bus = mbus; 303 ubus->mon_bus = mbus;
298 mbus->uses_dma = ubus->uses_dma;
299 304
300 mbus->text_inited = mon_text_add(mbus, ubus); 305 mbus->text_inited = mon_text_add(mbus, ubus->busnum);
301 // mon_bin_add(...) 306 // mon_bin_add(...)
302 307
303 mutex_lock(&mon_lock); 308 mutex_lock(&mon_lock);
@@ -309,6 +314,18 @@ err_alloc:
309 return; 314 return;
310} 315}
311 316
317static void mon_bus0_init(void)
318{
319 struct mon_bus *mbus = &mon_bus0;
320
321 kref_init(&mbus->ref);
322 spin_lock_init(&mbus->lock);
323 INIT_LIST_HEAD(&mbus->r_list);
324
325 mbus->text_inited = mon_text_add(mbus, 0);
326 // mbus->bin_inited = mon_bin_add(mbus, 0);
327}
328
312/* 329/*
313 * Search a USB bus by number. Notice that USB bus numbers start from one, 330 * Search a USB bus by number. Notice that USB bus numbers start from one,
314 * which we may later use to identify "all" with zero. 331 * which we may later use to identify "all" with zero.
@@ -322,6 +339,9 @@ struct mon_bus *mon_bus_lookup(unsigned int num)
322 struct list_head *p; 339 struct list_head *p;
323 struct mon_bus *mbus; 340 struct mon_bus *mbus;
324 341
342 if (num == 0) {
343 return &mon_bus0;
344 }
325 list_for_each (p, &mon_buses) { 345 list_for_each (p, &mon_buses) {
326 mbus = list_entry(p, struct mon_bus, bus_link); 346 mbus = list_entry(p, struct mon_bus, bus_link);
327 if (mbus->u_bus->busnum == num) { 347 if (mbus->u_bus->busnum == num) {
@@ -341,6 +361,8 @@ static int __init mon_init(void)
341 if ((rc = mon_bin_init()) != 0) 361 if ((rc = mon_bin_init()) != 0)
342 goto err_bin; 362 goto err_bin;
343 363
364 mon_bus0_init();
365
344 if (usb_mon_register(&mon_ops_0) != 0) { 366 if (usb_mon_register(&mon_ops_0) != 0) {
345 printk(KERN_NOTICE TAG ": unable to register with the core\n"); 367 printk(KERN_NOTICE TAG ": unable to register with the core\n");
346 rc = -ENODEV; 368 rc = -ENODEV;
@@ -374,6 +396,7 @@ static void __exit mon_exit(void)
374 usb_mon_deregister(); 396 usb_mon_deregister();
375 397
376 mutex_lock(&mon_lock); 398 mutex_lock(&mon_lock);
399
377 while (!list_empty(&mon_buses)) { 400 while (!list_empty(&mon_buses)) {
378 p = mon_buses.next; 401 p = mon_buses.next;
379 mbus = list_entry(p, struct mon_bus, bus_link); 402 mbus = list_entry(p, struct mon_bus, bus_link);
@@ -397,6 +420,11 @@ static void __exit mon_exit(void)
397 mon_dissolve(mbus, mbus->u_bus); 420 mon_dissolve(mbus, mbus->u_bus);
398 kref_put(&mbus->ref, mon_bus_drop); 421 kref_put(&mbus->ref, mon_bus_drop);
399 } 422 }
423
424 mbus = &mon_bus0;
425 if (mbus->text_inited)
426 mon_text_del(mbus);
427
400 mutex_unlock(&mon_lock); 428 mutex_unlock(&mon_lock);
401 429
402 mon_text_exit(); 430 mon_text_exit();
diff --git a/drivers/usb/mon/mon_text.c b/drivers/usb/mon/mon_text.c
index bbf54396e5f2..ec0cc51e39ac 100644
--- a/drivers/usb/mon/mon_text.c
+++ b/drivers/usb/mon/mon_text.c
@@ -124,8 +124,10 @@ static inline char mon_text_get_setup(struct mon_event_text *ep,
124 if (!usb_pipecontrol(urb->pipe) || ev_type != 'S') 124 if (!usb_pipecontrol(urb->pipe) || ev_type != 'S')
125 return '-'; 125 return '-';
126 126
127 if (mbus->uses_dma && (urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 127 if (urb->dev->bus->uses_dma &&
128 (urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) {
128 return mon_dmapeek(ep->setup, urb->setup_dma, SETUP_MAX); 129 return mon_dmapeek(ep->setup, urb->setup_dma, SETUP_MAX);
130 }
129 if (urb->setup_packet == NULL) 131 if (urb->setup_packet == NULL)
130 return 'Z'; /* '0' would be not as pretty. */ 132 return 'Z'; /* '0' would be not as pretty. */
131 133
@@ -160,8 +162,10 @@ static inline char mon_text_get_data(struct mon_event_text *ep, struct urb *urb,
160 * contain non-NULL garbage in case the upper level promised to 162 * contain non-NULL garbage in case the upper level promised to
161 * set DMA for the HCD. 163 * set DMA for the HCD.
162 */ 164 */
163 if (mbus->uses_dma && (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) 165 if (urb->dev->bus->uses_dma &&
166 (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) {
164 return mon_dmapeek(ep->data, urb->transfer_dma, len); 167 return mon_dmapeek(ep->data, urb->transfer_dma, len);
168 }
165 169
166 if (urb->transfer_buffer == NULL) 170 if (urb->transfer_buffer == NULL)
167 return 'Z'; /* '0' would be not as pretty. */ 171 return 'Z'; /* '0' would be not as pretty. */
@@ -201,7 +205,7 @@ static void mon_text_event(struct mon_reader_text *rp, struct urb *urb,
201 ep->type = ev_type; 205 ep->type = ev_type;
202 ep->pipe = urb->pipe; 206 ep->pipe = urb->pipe;
203 ep->id = (unsigned long) urb; 207 ep->id = (unsigned long) urb;
204 ep->busnum = rp->r.m_bus->u_bus->busnum; 208 ep->busnum = urb->dev->bus->busnum;
205 ep->tstamp = stamp; 209 ep->tstamp = stamp;
206 ep->length = (ev_type == 'S') ? 210 ep->length = (ev_type == 'S') ?
207 urb->transfer_buffer_length : urb->actual_length; 211 urb->transfer_buffer_length : urb->actual_length;
@@ -305,13 +309,11 @@ static struct mon_event_text *mon_text_fetch(struct mon_reader_text *rp,
305static int mon_text_open(struct inode *inode, struct file *file) 309static int mon_text_open(struct inode *inode, struct file *file)
306{ 310{
307 struct mon_bus *mbus; 311 struct mon_bus *mbus;
308 struct usb_bus *ubus;
309 struct mon_reader_text *rp; 312 struct mon_reader_text *rp;
310 int rc; 313 int rc;
311 314
312 mutex_lock(&mon_lock); 315 mutex_lock(&mon_lock);
313 mbus = inode->i_private; 316 mbus = inode->i_private;
314 ubus = mbus->u_bus;
315 317
316 rp = kzalloc(sizeof(struct mon_reader_text), GFP_KERNEL); 318 rp = kzalloc(sizeof(struct mon_reader_text), GFP_KERNEL);
317 if (rp == NULL) { 319 if (rp == NULL) {
@@ -335,8 +337,7 @@ static int mon_text_open(struct inode *inode, struct file *file)
335 rp->r.rnf_error = mon_text_error; 337 rp->r.rnf_error = mon_text_error;
336 rp->r.rnf_complete = mon_text_complete; 338 rp->r.rnf_complete = mon_text_complete;
337 339
338 snprintf(rp->slab_name, SLAB_NAME_SZ, "mon%dt_%lx", ubus->busnum, 340 snprintf(rp->slab_name, SLAB_NAME_SZ, "mon_text_%p", rp);
339 (long)rp);
340 rp->e_slab = kmem_cache_create(rp->slab_name, 341 rp->e_slab = kmem_cache_create(rp->slab_name,
341 sizeof(struct mon_event_text), sizeof(long), 0, 342 sizeof(struct mon_event_text), sizeof(long), 0,
342 mon_text_ctor, NULL); 343 mon_text_ctor, NULL);
@@ -654,14 +655,14 @@ static const struct file_operations mon_fops_text_u = {
654 .release = mon_text_release, 655 .release = mon_text_release,
655}; 656};
656 657
657int mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus) 658int mon_text_add(struct mon_bus *mbus, int busnum)
658{ 659{
659 struct dentry *d; 660 struct dentry *d;
660 enum { NAMESZ = 10 }; 661 enum { NAMESZ = 10 };
661 char name[NAMESZ]; 662 char name[NAMESZ];
662 int rc; 663 int rc;
663 664
664 rc = snprintf(name, NAMESZ, "%dt", ubus->busnum); 665 rc = snprintf(name, NAMESZ, "%dt", busnum);
665 if (rc <= 0 || rc >= NAMESZ) 666 if (rc <= 0 || rc >= NAMESZ)
666 goto err_print_t; 667 goto err_print_t;
667 d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_text_t); 668 d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_text_t);
@@ -669,7 +670,7 @@ int mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus)
669 goto err_create_t; 670 goto err_create_t;
670 mbus->dent_t = d; 671 mbus->dent_t = d;
671 672
672 rc = snprintf(name, NAMESZ, "%du", ubus->busnum); 673 rc = snprintf(name, NAMESZ, "%du", busnum);
673 if (rc <= 0 || rc >= NAMESZ) 674 if (rc <= 0 || rc >= NAMESZ)
674 goto err_print_u; 675 goto err_print_u;
675 d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_text_u); 676 d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_text_u);
@@ -677,7 +678,7 @@ int mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus)
677 goto err_create_u; 678 goto err_create_u;
678 mbus->dent_u = d; 679 mbus->dent_u = d;
679 680
680 rc = snprintf(name, NAMESZ, "%ds", ubus->busnum); 681 rc = snprintf(name, NAMESZ, "%ds", busnum);
681 if (rc <= 0 || rc >= NAMESZ) 682 if (rc <= 0 || rc >= NAMESZ)
682 goto err_print_s; 683 goto err_print_s;
683 d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_stat); 684 d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_stat);
diff --git a/drivers/usb/mon/usb_mon.h b/drivers/usb/mon/usb_mon.h
index a1e2b8e9d777..13d63255283e 100644
--- a/drivers/usb/mon/usb_mon.h
+++ b/drivers/usb/mon/usb_mon.h
@@ -23,7 +23,6 @@ struct mon_bus {
23 struct dentry *dent_s; /* Debugging file */ 23 struct dentry *dent_s; /* Debugging file */
24 struct dentry *dent_t; /* Text interface file */ 24 struct dentry *dent_t; /* Text interface file */
25 struct dentry *dent_u; /* Second text interface file */ 25 struct dentry *dent_u; /* Second text interface file */
26 int uses_dma;
27 26
28 /* Ref */ 27 /* Ref */
29 int nreaders; /* Under mon_lock AND mbus->lock */ 28 int nreaders; /* Under mon_lock AND mbus->lock */
@@ -53,7 +52,7 @@ void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r);
53 52
54struct mon_bus *mon_bus_lookup(unsigned int num); 53struct mon_bus *mon_bus_lookup(unsigned int num);
55 54
56int /*bool*/ mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus); 55int /*bool*/ mon_text_add(struct mon_bus *mbus, int busnum);
57void mon_text_del(struct mon_bus *mbus); 56void mon_text_del(struct mon_bus *mbus);
58// void mon_bin_add(struct mon_bus *); 57// void mon_bin_add(struct mon_bus *);
59 58
@@ -82,4 +81,6 @@ extern struct mutex mon_lock;
82 81
83extern const struct file_operations mon_fops_stat; 82extern const struct file_operations mon_fops_stat;
84 83
84extern struct mon_bus mon_bus0; /* Only for redundant checks */
85
85#endif /* __USB_MON_H */ 86#endif /* __USB_MON_H */