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path: root/drivers/mtd/mtdoops.c
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Diffstat (limited to 'drivers/mtd/mtdoops.c')
-rw-r--r--drivers/mtd/mtdoops.c81
1 files changed, 40 insertions, 41 deletions
diff --git a/drivers/mtd/mtdoops.c b/drivers/mtd/mtdoops.c
index 1060337c06df..c383add060d8 100644
--- a/drivers/mtd/mtdoops.c
+++ b/drivers/mtd/mtdoops.c
@@ -81,9 +81,9 @@ static int mtdoops_erase_block(struct mtd_info *mtd, int offset)
81 if (ret) { 81 if (ret) {
82 set_current_state(TASK_RUNNING); 82 set_current_state(TASK_RUNNING);
83 remove_wait_queue(&wait_q, &wait); 83 remove_wait_queue(&wait_q, &wait);
84 printk (KERN_WARNING "mtdoops: erase of region [0x%llx, 0x%llx] " 84 printk(KERN_WARNING "mtdoops: erase of region [0x%llx, 0x%llx] on \"%s\" failed\n",
85 "on \"%s\" failed\n", 85 (unsigned long long)erase.addr,
86 (unsigned long long)erase.addr, (unsigned long long)erase.len, mtd->name); 86 (unsigned long long)erase.len, mtd->name);
87 return ret; 87 return ret;
88 } 88 }
89 89
@@ -109,10 +109,9 @@ static void mtdoops_inc_counter(struct mtdoops_context *cxt)
109 109
110 ret = mtd->read(mtd, cxt->nextpage * OOPS_PAGE_SIZE, 4, 110 ret = mtd->read(mtd, cxt->nextpage * OOPS_PAGE_SIZE, 4,
111 &retlen, (u_char *) &count); 111 &retlen, (u_char *) &count);
112 if ((retlen != 4) || ((ret < 0) && (ret != -EUCLEAN))) { 112 if (retlen != 4 || (ret < 0 && ret != -EUCLEAN)) {
113 printk(KERN_ERR "mtdoops: Read failure at %d (%td of 4 read)" 113 printk(KERN_ERR "mtdoops: read failure at %d (%td of 4 read), err %d\n",
114 ", err %d.\n", cxt->nextpage * OOPS_PAGE_SIZE, 114 cxt->nextpage * OOPS_PAGE_SIZE, retlen, ret);
115 retlen, ret);
116 schedule_work(&cxt->work_erase); 115 schedule_work(&cxt->work_erase);
117 return; 116 return;
118 } 117 }
@@ -123,8 +122,8 @@ static void mtdoops_inc_counter(struct mtdoops_context *cxt)
123 return; 122 return;
124 } 123 }
125 124
126 printk(KERN_DEBUG "mtdoops: Ready %d, %d (no erase)\n", 125 printk(KERN_DEBUG "mtdoops: ready %d, %d (no erase)\n",
127 cxt->nextpage, cxt->nextcount); 126 cxt->nextpage, cxt->nextcount);
128 cxt->ready = 1; 127 cxt->ready = 1;
129} 128}
130 129
@@ -152,18 +151,18 @@ static void mtdoops_workfunc_erase(struct work_struct *work)
152 if (!ret) 151 if (!ret)
153 break; 152 break;
154 if (ret < 0) { 153 if (ret < 0) {
155 printk(KERN_ERR "mtdoops: block_isbad failed, aborting.\n"); 154 printk(KERN_ERR "mtdoops: block_isbad failed, aborting\n");
156 return; 155 return;
157 } 156 }
158badblock: 157badblock:
159 printk(KERN_WARNING "mtdoops: Bad block at %08x\n", 158 printk(KERN_WARNING "mtdoops: bad block at %08x\n",
160 cxt->nextpage * OOPS_PAGE_SIZE); 159 cxt->nextpage * OOPS_PAGE_SIZE);
161 i++; 160 i++;
162 cxt->nextpage = cxt->nextpage + (mtd->erasesize / OOPS_PAGE_SIZE); 161 cxt->nextpage = cxt->nextpage + (mtd->erasesize / OOPS_PAGE_SIZE);
163 if (cxt->nextpage >= cxt->oops_pages) 162 if (cxt->nextpage >= cxt->oops_pages)
164 cxt->nextpage = 0; 163 cxt->nextpage = 0;
165 if (i == (cxt->oops_pages / (mtd->erasesize / OOPS_PAGE_SIZE))) { 164 if (i == cxt->oops_pages / (mtd->erasesize / OOPS_PAGE_SIZE)) {
166 printk(KERN_ERR "mtdoops: All blocks bad!\n"); 165 printk(KERN_ERR "mtdoops: all blocks bad!\n");
167 return; 166 return;
168 } 167 }
169 } 168 }
@@ -172,15 +171,16 @@ badblock:
172 ret = mtdoops_erase_block(mtd, cxt->nextpage * OOPS_PAGE_SIZE); 171 ret = mtdoops_erase_block(mtd, cxt->nextpage * OOPS_PAGE_SIZE);
173 172
174 if (ret >= 0) { 173 if (ret >= 0) {
175 printk(KERN_DEBUG "mtdoops: Ready %d, %d \n", cxt->nextpage, cxt->nextcount); 174 printk(KERN_DEBUG "mtdoops: ready %d, %d\n",
175 cxt->nextpage, cxt->nextcount);
176 cxt->ready = 1; 176 cxt->ready = 1;
177 return; 177 return;
178 } 178 }
179 179
180 if (mtd->block_markbad && (ret == -EIO)) { 180 if (mtd->block_markbad && ret == -EIO) {
181 ret = mtd->block_markbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE); 181 ret = mtd->block_markbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE);
182 if (ret < 0) { 182 if (ret < 0) {
183 printk(KERN_ERR "mtdoops: block_markbad failed, aborting.\n"); 183 printk(KERN_ERR "mtdoops: block_markbad failed, aborting\n");
184 return; 184 return;
185 } 185 }
186 } 186 }
@@ -206,9 +206,9 @@ static void mtdoops_write(struct mtdoops_context *cxt, int panic)
206 206
207 cxt->writecount = 0; 207 cxt->writecount = 0;
208 208
209 if ((retlen != OOPS_PAGE_SIZE) || (ret < 0)) 209 if (retlen != OOPS_PAGE_SIZE || ret < 0)
210 printk(KERN_ERR "mtdoops: Write failure at %d (%td of %d written), err %d.\n", 210 printk(KERN_ERR "mtdoops: write failure at %d (%td of %d written), error %d\n",
211 cxt->nextpage * OOPS_PAGE_SIZE, retlen, OOPS_PAGE_SIZE, ret); 211 cxt->nextpage * OOPS_PAGE_SIZE, retlen, OOPS_PAGE_SIZE, ret);
212 212
213 mtdoops_inc_counter(cxt); 213 mtdoops_inc_counter(cxt);
214} 214}
@@ -220,7 +220,7 @@ static void mtdoops_workfunc_write(struct work_struct *work)
220 container_of(work, struct mtdoops_context, work_write); 220 container_of(work, struct mtdoops_context, work_write);
221 221
222 mtdoops_write(cxt, 0); 222 mtdoops_write(cxt, 0);
223} 223}
224 224
225static void find_next_position(struct mtdoops_context *cxt) 225static void find_next_position(struct mtdoops_context *cxt)
226{ 226{
@@ -231,9 +231,9 @@ static void find_next_position(struct mtdoops_context *cxt)
231 231
232 for (page = 0; page < cxt->oops_pages; page++) { 232 for (page = 0; page < cxt->oops_pages; page++) {
233 ret = mtd->read(mtd, page * OOPS_PAGE_SIZE, 8, &retlen, (u_char *) &count[0]); 233 ret = mtd->read(mtd, page * OOPS_PAGE_SIZE, 8, &retlen, (u_char *) &count[0]);
234 if ((retlen != 8) || ((ret < 0) && (ret != -EUCLEAN))) { 234 if (retlen != 8 || (ret < 0 && ret != -EUCLEAN)) {
235 printk(KERN_ERR "mtdoops: Read failure at %d (%td of 8 read)" 235 printk(KERN_ERR "mtdoops: read failure at %d (%td of 8 read), err %d\n",
236 ", err %d.\n", page * OOPS_PAGE_SIZE, retlen, ret); 236 page * OOPS_PAGE_SIZE, retlen, ret);
237 continue; 237 continue;
238 } 238 }
239 239
@@ -244,14 +244,14 @@ static void find_next_position(struct mtdoops_context *cxt)
244 if (maxcount == 0xffffffff) { 244 if (maxcount == 0xffffffff) {
245 maxcount = count[0]; 245 maxcount = count[0];
246 maxpos = page; 246 maxpos = page;
247 } else if ((count[0] < 0x40000000) && (maxcount > 0xc0000000)) { 247 } else if (count[0] < 0x40000000 && maxcount > 0xc0000000) {
248 maxcount = count[0]; 248 maxcount = count[0];
249 maxpos = page; 249 maxpos = page;
250 } else if ((count[0] > maxcount) && (count[0] < 0xc0000000)) { 250 } else if (count[0] > maxcount && count[0] < 0xc0000000) {
251 maxcount = count[0]; 251 maxcount = count[0];
252 maxpos = page; 252 maxpos = page;
253 } else if ((count[0] > maxcount) && (count[0] > 0xc0000000) 253 } else if (count[0] > maxcount && count[0] > 0xc0000000
254 && (maxcount > 0x80000000)) { 254 && maxcount > 0x80000000) {
255 maxcount = count[0]; 255 maxcount = count[0];
256 maxpos = page; 256 maxpos = page;
257 } 257 }
@@ -277,18 +277,18 @@ static void mtdoops_notify_add(struct mtd_info *mtd)
277 if (cxt->name && !strcmp(mtd->name, cxt->name)) 277 if (cxt->name && !strcmp(mtd->name, cxt->name))
278 cxt->mtd_index = mtd->index; 278 cxt->mtd_index = mtd->index;
279 279
280 if ((mtd->index != cxt->mtd_index) || cxt->mtd_index < 0) 280 if (mtd->index != cxt->mtd_index || cxt->mtd_index < 0)
281 return; 281 return;
282 282
283 if (mtd->size < (mtd->erasesize * 2)) { 283 if (mtd->size < mtd->erasesize * 2) {
284 printk(KERN_ERR "MTD partition %d not big enough for mtdoops\n", 284 printk(KERN_ERR "mtdoops: MTD partition %d not big enough for mtdoops\n",
285 mtd->index); 285 mtd->index);
286 return; 286 return;
287 } 287 }
288 288
289 if (mtd->erasesize < OOPS_PAGE_SIZE) { 289 if (mtd->erasesize < OOPS_PAGE_SIZE) {
290 printk(KERN_ERR "Eraseblock size of MTD partition %d too small\n", 290 printk(KERN_ERR "mtdoops: eraseblock size of MTD partition %d too small\n",
291 mtd->index); 291 mtd->index);
292 return; 292 return;
293 } 293 }
294 294
@@ -307,7 +307,7 @@ static void mtdoops_notify_remove(struct mtd_info *mtd)
307{ 307{
308 struct mtdoops_context *cxt = &oops_cxt; 308 struct mtdoops_context *cxt = &oops_cxt;
309 309
310 if ((mtd->index != cxt->mtd_index) || cxt->mtd_index < 0) 310 if (mtd->index != cxt->mtd_index || cxt->mtd_index < 0)
311 return; 311 return;
312 312
313 cxt->mtd = NULL; 313 cxt->mtd = NULL;
@@ -323,8 +323,8 @@ static void mtdoops_console_sync(void)
323 if (!cxt->ready || !mtd || cxt->writecount == 0) 323 if (!cxt->ready || !mtd || cxt->writecount == 0)
324 return; 324 return;
325 325
326 /* 326 /*
327 * Once ready is 0 and we've held the lock no further writes to the 327 * Once ready is 0 and we've held the lock no further writes to the
328 * buffer will happen 328 * buffer will happen
329 */ 329 */
330 spin_lock_irqsave(&cxt->writecount_lock, flags); 330 spin_lock_irqsave(&cxt->writecount_lock, flags);
@@ -373,7 +373,7 @@ mtdoops_console_write(struct console *co, const char *s, unsigned int count)
373 cxt->writecount = 8; 373 cxt->writecount = 8;
374 } 374 }
375 375
376 if ((count + cxt->writecount) > OOPS_PAGE_SIZE) 376 if (count + cxt->writecount > OOPS_PAGE_SIZE)
377 count = OOPS_PAGE_SIZE - cxt->writecount; 377 count = OOPS_PAGE_SIZE - cxt->writecount;
378 378
379 memcpy(cxt->oops_buf + cxt->writecount, s, count); 379 memcpy(cxt->oops_buf + cxt->writecount, s, count);
@@ -422,13 +422,12 @@ static int __init mtdoops_console_init(void)
422 422
423 cxt->mtd_index = -1; 423 cxt->mtd_index = -1;
424 cxt->oops_buf = vmalloc(OOPS_PAGE_SIZE); 424 cxt->oops_buf = vmalloc(OOPS_PAGE_SIZE);
425 spin_lock_init(&cxt->writecount_lock);
426
427 if (!cxt->oops_buf) { 425 if (!cxt->oops_buf) {
428 printk(KERN_ERR "Failed to allocate mtdoops buffer workspace\n"); 426 printk(KERN_ERR "mtdoops: failed to allocate buffer workspace\n");
429 return -ENOMEM; 427 return -ENOMEM;
430 } 428 }
431 429
430 spin_lock_init(&cxt->writecount_lock);
432 INIT_WORK(&cxt->work_erase, mtdoops_workfunc_erase); 431 INIT_WORK(&cxt->work_erase, mtdoops_workfunc_erase);
433 INIT_WORK(&cxt->work_write, mtdoops_workfunc_write); 432 INIT_WORK(&cxt->work_write, mtdoops_workfunc_write);
434 433
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-20 03:22:49 -0500