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-rw-r--r--fs/pstore/inode.c1
-rw-r--r--fs/pstore/platform.c27
-rw-r--r--fs/pstore/ram.c19
-rw-r--r--fs/pstore/ram_core.c40
4 files changed, 46 insertions, 41 deletions
diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
index 12823845d32..192297b0090 100644
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -249,6 +249,7 @@ static void parse_options(char *options)
static int pstore_remount(struct super_block *sb, int *flags, char *data)
{
+ sync_filesystem(sb);
parse_options(data);
return 0;
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index b8e93a40a5d..0a9b72cdfec 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -18,6 +18,8 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#define pr_fmt(fmt) "pstore: " fmt
+
#include <linux/atomic.h>
#include <linux/types.h>
#include <linux/errno.h>
@@ -224,14 +226,12 @@ static void allocate_buf_for_compression(void)
zlib_inflate_workspacesize());
stream.workspace = kmalloc(size, GFP_KERNEL);
if (!stream.workspace) {
- pr_err("pstore: No memory for compression workspace; "
- "skipping compression\n");
+ pr_err("No memory for compression workspace; skipping compression\n");
kfree(big_oops_buf);
big_oops_buf = NULL;
}
} else {
- pr_err("No memory for uncompressed data; "
- "skipping compression\n");
+ pr_err("No memory for uncompressed data; skipping compression\n");
stream.workspace = NULL;
}
@@ -443,8 +443,11 @@ int pstore_register(struct pstore_info *psi)
pstore_get_records(0);
kmsg_dump_register(&pstore_dumper);
- pstore_register_console();
- pstore_register_ftrace();
+
+ if ((psi->flags & PSTORE_FLAGS_FRAGILE) == 0) {
+ pstore_register_console();
+ pstore_register_ftrace();
+ }
if (pstore_update_ms >= 0) {
pstore_timer.expires = jiffies +
@@ -452,8 +455,7 @@ int pstore_register(struct pstore_info *psi)
add_timer(&pstore_timer);
}
- pr_info("pstore: Registered %s as persistent store backend\n",
- psi->name);
+ pr_info("Registered %s as persistent store backend\n", psi->name);
return 0;
}
@@ -494,12 +496,13 @@ void pstore_get_records(int quiet)
big_oops_buf_sz);
if (unzipped_len > 0) {
+ kfree(buf);
buf = big_oops_buf;
size = unzipped_len;
compressed = false;
} else {
- pr_err("pstore: decompression failed;"
- "returned %d\n", unzipped_len);
+ pr_err("decompression failed;returned %d\n",
+ unzipped_len);
compressed = true;
}
}
@@ -520,8 +523,8 @@ out:
mutex_unlock(&psi->read_mutex);
if (failed)
- printk(KERN_WARNING "pstore: failed to load %d record(s) from '%s'\n",
- failed, psi->name);
+ pr_warn("failed to load %d record(s) from '%s'\n",
+ failed, psi->name);
}
static void pstore_dowork(struct work_struct *work)
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index fa8cef2cca3..3b5744306ed 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -86,6 +86,7 @@ struct ramoops_context {
struct persistent_ram_ecc_info ecc_info;
unsigned int max_dump_cnt;
unsigned int dump_write_cnt;
+ /* _read_cnt need clear on ramoops_pstore_open */
unsigned int dump_read_cnt;
unsigned int console_read_cnt;
unsigned int ftrace_read_cnt;
@@ -101,6 +102,7 @@ static int ramoops_pstore_open(struct pstore_info *psi)
cxt->dump_read_cnt = 0;
cxt->console_read_cnt = 0;
+ cxt->ftrace_read_cnt = 0;
return 0;
}
@@ -117,13 +119,15 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max,
return NULL;
prz = przs[i];
+ if (!prz)
+ return NULL;
- if (update) {
- /* Update old/shadowed buffer. */
+ /* Update old/shadowed buffer. */
+ if (update)
persistent_ram_save_old(prz);
- if (!persistent_ram_old_size(prz))
- return NULL;
- }
+
+ if (!persistent_ram_old_size(prz))
+ return NULL;
*typep = type;
*id = i;
@@ -316,6 +320,7 @@ static void ramoops_free_przs(struct ramoops_context *cxt)
{
int i;
+ cxt->max_dump_cnt = 0;
if (!cxt->przs)
return;
@@ -346,7 +351,7 @@ static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt,
GFP_KERNEL);
if (!cxt->przs) {
dev_err(dev, "failed to initialize a prz array for dumps\n");
- return -ENOMEM;
+ goto fail_prz;
}
for (i = 0; i < cxt->max_dump_cnt; i++) {
@@ -428,7 +433,6 @@ static int ramoops_probe(struct platform_device *pdev)
if (pdata->ftrace_size && !is_power_of_2(pdata->ftrace_size))
pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size);
- cxt->dump_read_cnt = 0;
cxt->size = pdata->mem_size;
cxt->phys_addr = pdata->mem_address;
cxt->record_size = pdata->record_size;
@@ -505,7 +509,6 @@ fail_buf:
kfree(cxt->pstore.buf);
fail_clear:
cxt->pstore.bufsize = 0;
- cxt->max_dump_cnt = 0;
fail_cnt:
kfree(cxt->fprz);
fail_init_fprz:
diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c
index de272d42676..34a1e5aa848 100644
--- a/fs/pstore/ram_core.c
+++ b/fs/pstore/ram_core.c
@@ -12,6 +12,8 @@
*
*/
+#define pr_fmt(fmt) "persistent_ram: " fmt
+
#include <linux/device.h>
#include <linux/err.h>
#include <linux/errno.h>
@@ -54,7 +56,7 @@ static size_t buffer_start_add_atomic(struct persistent_ram_zone *prz, size_t a)
do {
old = atomic_read(&prz->buffer->start);
new = old + a;
- while (unlikely(new > prz->buffer_size))
+ while (unlikely(new >= prz->buffer_size))
new -= prz->buffer_size;
} while (atomic_cmpxchg(&prz->buffer->start, old, new) != old);
@@ -91,7 +93,7 @@ static size_t buffer_start_add_locked(struct persistent_ram_zone *prz, size_t a)
old = atomic_read(&prz->buffer->start);
new = old + a;
- while (unlikely(new > prz->buffer_size))
+ while (unlikely(new >= prz->buffer_size))
new -= prz->buffer_size;
atomic_set(&prz->buffer->start, new);
@@ -205,12 +207,10 @@ static void persistent_ram_ecc_old(struct persistent_ram_zone *prz)
size = buffer->data + prz->buffer_size - block;
numerr = persistent_ram_decode_rs8(prz, block, size, par);
if (numerr > 0) {
- pr_devel("persistent_ram: error in block %p, %d\n",
- block, numerr);
+ pr_devel("error in block %p, %d\n", block, numerr);
prz->corrected_bytes += numerr;
} else if (numerr < 0) {
- pr_devel("persistent_ram: uncorrectable error in block %p\n",
- block);
+ pr_devel("uncorrectable error in block %p\n", block);
prz->bad_blocks++;
}
block += prz->ecc_info.block_size;
@@ -257,7 +257,7 @@ static int persistent_ram_init_ecc(struct persistent_ram_zone *prz,
prz->rs_decoder = init_rs(prz->ecc_info.symsize, prz->ecc_info.poly,
0, 1, prz->ecc_info.ecc_size);
if (prz->rs_decoder == NULL) {
- pr_info("persistent_ram: init_rs failed\n");
+ pr_info("init_rs failed\n");
return -EINVAL;
}
@@ -267,10 +267,10 @@ static int persistent_ram_init_ecc(struct persistent_ram_zone *prz,
numerr = persistent_ram_decode_rs8(prz, buffer, sizeof(*buffer),
prz->par_header);
if (numerr > 0) {
- pr_info("persistent_ram: error in header, %d\n", numerr);
+ pr_info("error in header, %d\n", numerr);
prz->corrected_bytes += numerr;
} else if (numerr < 0) {
- pr_info("persistent_ram: uncorrectable error in header\n");
+ pr_info("uncorrectable error in header\n");
prz->bad_blocks++;
}
@@ -317,7 +317,7 @@ void persistent_ram_save_old(struct persistent_ram_zone *prz)
prz->old_log = kmalloc(size, GFP_KERNEL);
}
if (!prz->old_log) {
- pr_err("persistent_ram: failed to allocate buffer\n");
+ pr_err("failed to allocate buffer\n");
return;
}
@@ -396,8 +396,8 @@ static void *persistent_ram_vmap(phys_addr_t start, size_t size)
pages = kmalloc(sizeof(struct page *) * page_count, GFP_KERNEL);
if (!pages) {
- pr_err("%s: Failed to allocate array for %u pages\n", __func__,
- page_count);
+ pr_err("%s: Failed to allocate array for %u pages\n",
+ __func__, page_count);
return NULL;
}
@@ -462,19 +462,17 @@ static int persistent_ram_post_init(struct persistent_ram_zone *prz, u32 sig,
if (prz->buffer->sig == sig) {
if (buffer_size(prz) > prz->buffer_size ||
buffer_start(prz) > buffer_size(prz))
- pr_info("persistent_ram: found existing invalid buffer,"
- " size %zu, start %zu\n",
- buffer_size(prz), buffer_start(prz));
+ pr_info("found existing invalid buffer, size %zu, start %zu\n",
+ buffer_size(prz), buffer_start(prz));
else {
- pr_debug("persistent_ram: found existing buffer,"
- " size %zu, start %zu\n",
- buffer_size(prz), buffer_start(prz));
+ pr_debug("found existing buffer, size %zu, start %zu\n",
+ buffer_size(prz), buffer_start(prz));
persistent_ram_save_old(prz);
return 0;
}
} else {
- pr_debug("persistent_ram: no valid data in buffer"
- " (sig = 0x%08x)\n", prz->buffer->sig);
+ pr_debug("no valid data in buffer (sig = 0x%08x)\n",
+ prz->buffer->sig);
}
prz->buffer->sig = sig;
@@ -509,7 +507,7 @@ struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
prz = kzalloc(sizeof(struct persistent_ram_zone), GFP_KERNEL);
if (!prz) {
- pr_err("persistent_ram: failed to allocate persistent ram zone\n");
+ pr_err("failed to allocate persistent ram zone\n");
goto err;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:37:23 +0000