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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.c99
1 files changed, 41 insertions, 58 deletions
diff --git a/drivers/mtd/mtdoops.c b/drivers/mtd/mtdoops.c
index e3e40f44032..97bb8f6304d 100644
--- a/drivers/mtd/mtdoops.c
+++ b/drivers/mtd/mtdoops.c
@@ -112,7 +112,7 @@ static int mtdoops_erase_block(struct mtdoops_context *cxt, int offset)
set_current_state(TASK_INTERRUPTIBLE);
add_wait_queue(&wait_q, &wait);
- ret = mtd->erase(mtd, &erase);
+ ret = mtd_erase(mtd, &erase);
if (ret) {
set_current_state(TASK_RUNNING);
remove_wait_queue(&wait_q, &wait);
@@ -169,14 +169,7 @@ static void mtdoops_workfunc_erase(struct work_struct *work)
cxt->nextpage = 0;
}
- while (mtd->block_isbad) {
- ret = mtd->block_isbad(mtd, cxt->nextpage * record_size);
- if (!ret)
- break;
- if (ret < 0) {
- printk(KERN_ERR "mtdoops: block_isbad failed, aborting\n");
- return;
- }
+ while ((ret = mtd_block_isbad(mtd, cxt->nextpage * record_size)) > 0) {
badblock:
printk(KERN_WARNING "mtdoops: bad block at %08lx\n",
cxt->nextpage * record_size);
@@ -190,6 +183,11 @@ badblock:
}
}
+ if (ret < 0) {
+ printk(KERN_ERR "mtdoops: mtd_block_isbad failed, aborting\n");
+ return;
+ }
+
for (j = 0, ret = -1; (j < 3) && (ret < 0); j++)
ret = mtdoops_erase_block(cxt, cxt->nextpage * record_size);
@@ -199,9 +197,9 @@ badblock:
return;
}
- if (mtd->block_markbad && ret == -EIO) {
- ret = mtd->block_markbad(mtd, cxt->nextpage * record_size);
- if (ret < 0) {
+ if (ret == -EIO) {
+ ret = mtd_block_markbad(mtd, cxt->nextpage * record_size);
+ if (ret < 0 && ret != -EOPNOTSUPP) {
printk(KERN_ERR "mtdoops: block_markbad failed, aborting\n");
return;
}
@@ -221,12 +219,16 @@ static void mtdoops_write(struct mtdoops_context *cxt, int panic)
hdr[0] = cxt->nextcount;
hdr[1] = MTDOOPS_KERNMSG_MAGIC;
- if (panic)
- ret = mtd->panic_write(mtd, cxt->nextpage * record_size,
- record_size, &retlen, cxt->oops_buf);
- else
- ret = mtd->write(mtd, cxt->nextpage * record_size,
- record_size, &retlen, cxt->oops_buf);
+ if (panic) {
+ ret = mtd_panic_write(mtd, cxt->nextpage * record_size,
+ record_size, &retlen, cxt->oops_buf);
+ if (ret == -EOPNOTSUPP) {
+ printk(KERN_ERR "mtdoops: Cannot write from panic without panic_write\n");
+ return;
+ }
+ } else
+ ret = mtd_write(mtd, cxt->nextpage * record_size,
+ record_size, &retlen, cxt->oops_buf);
if (retlen != record_size || ret < 0)
printk(KERN_ERR "mtdoops: write failure at %ld (%td of %ld written), error %d\n",
@@ -253,12 +255,14 @@ static void find_next_position(struct mtdoops_context *cxt)
size_t retlen;
for (page = 0; page < cxt->oops_pages; page++) {
+ if (mtd_block_isbad(mtd, page * record_size))
+ continue;
/* Assume the page is used */
mark_page_used(cxt, page);
- ret = mtd->read(mtd, page * record_size, MTDOOPS_HEADER_SIZE,
- &retlen, (u_char *) &count[0]);
+ ret = mtd_read(mtd, page * record_size, MTDOOPS_HEADER_SIZE,
+ &retlen, (u_char *)&count[0]);
if (retlen != MTDOOPS_HEADER_SIZE ||
- (ret < 0 && ret != -EUCLEAN)) {
+ (ret < 0 && !mtd_is_bitflip(ret))) {
printk(KERN_ERR "mtdoops: read failure at %ld (%td of %d read), err %d\n",
page * record_size, retlen,
MTDOOPS_HEADER_SIZE, ret);
@@ -267,7 +271,7 @@ static void find_next_position(struct mtdoops_context *cxt)
if (count[0] == 0xffffffff && count[1] == 0xffffffff)
mark_page_unused(cxt, page);
- if (count[0] == 0xffffffff)
+ if (count[0] == 0xffffffff || count[1] != MTDOOPS_KERNMSG_MAGIC)
continue;
if (maxcount == 0xffffffff) {
maxcount = count[0];
@@ -285,55 +289,33 @@ static void find_next_position(struct mtdoops_context *cxt)
}
}
if (maxcount == 0xffffffff) {
- cxt->nextpage = 0;
- cxt->nextcount = 1;
- schedule_work(&cxt->work_erase);
- return;
+ cxt->nextpage = cxt->oops_pages - 1;
+ cxt->nextcount = 0;
+ }
+ else {
+ cxt->nextpage = maxpos;
+ cxt->nextcount = maxcount;
}
-
- cxt->nextpage = maxpos;
- cxt->nextcount = maxcount;
mtdoops_inc_counter(cxt);
}
static void mtdoops_do_dump(struct kmsg_dumper *dumper,
- enum kmsg_dump_reason reason, const char *s1, unsigned long l1,
- const char *s2, unsigned long l2)
+ enum kmsg_dump_reason reason)
{
struct mtdoops_context *cxt = container_of(dumper,
struct mtdoops_context, dump);
- unsigned long s1_start, s2_start;
- unsigned long l1_cpy, l2_cpy;
- char *dst;
-
- if (reason != KMSG_DUMP_OOPS &&
- reason != KMSG_DUMP_PANIC &&
- reason != KMSG_DUMP_KEXEC)
- return;
/* Only dump oopses if dump_oops is set */
if (reason == KMSG_DUMP_OOPS && !dump_oops)
return;
- dst = cxt->oops_buf + MTDOOPS_HEADER_SIZE; /* Skip the header */
- l2_cpy = min(l2, record_size - MTDOOPS_HEADER_SIZE);
- l1_cpy = min(l1, record_size - MTDOOPS_HEADER_SIZE - l2_cpy);
-
- s2_start = l2 - l2_cpy;
- s1_start = l1 - l1_cpy;
-
- memcpy(dst, s1 + s1_start, l1_cpy);
- memcpy(dst + l1_cpy, s2 + s2_start, l2_cpy);
+ kmsg_dump_get_buffer(dumper, true, cxt->oops_buf + MTDOOPS_HEADER_SIZE,
+ record_size - MTDOOPS_HEADER_SIZE, NULL);
/* Panics must be written immediately */
- if (reason != KMSG_DUMP_OOPS) {
- if (!cxt->mtd->panic_write)
- printk(KERN_ERR "mtdoops: Cannot write from panic without panic_write\n");
- else
- mtdoops_write(cxt, 1);
- return;
- }
+ if (reason != KMSG_DUMP_OOPS)
+ mtdoops_write(cxt, 1);
/* For other cases, schedule work to write it "nicely" */
schedule_work(&cxt->work_write);
@@ -369,12 +351,13 @@ static void mtdoops_notify_add(struct mtd_info *mtd)
/* oops_page_used is a bit field */
cxt->oops_page_used = vmalloc(DIV_ROUND_UP(mtdoops_pages,
- BITS_PER_LONG));
+ BITS_PER_LONG) * sizeof(unsigned long));
if (!cxt->oops_page_used) {
printk(KERN_ERR "mtdoops: could not allocate page array\n");
return;
}
+ cxt->dump.max_reason = KMSG_DUMP_OOPS;
cxt->dump.dump = mtdoops_do_dump;
err = kmsg_dump_register(&cxt->dump);
if (err) {
@@ -401,8 +384,8 @@ static void mtdoops_notify_remove(struct mtd_info *mtd)
printk(KERN_WARNING "mtdoops: could not unregister kmsg_dumper\n");
cxt->mtd = NULL;
- flush_work_sync(&cxt->work_erase);
- flush_work_sync(&cxt->work_write);
+ flush_work(&cxt->work_erase);
+ flush_work(&cxt->work_write);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 16:32:11 +0000