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-rw-r--r--fs/pstore/ram.c52
1 files changed, 24 insertions, 28 deletions
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index c5c685589e36..5b7709894415 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* RAM Oops/Panic logger
*
* Copyright (C) 2010 Marco Stornelli <marco.stornelli@gmail.com>
* Copyright (C) 2011 Kees Cook <keescook@chromium.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -800,26 +786,36 @@ static int ramoops_probe(struct platform_device *pdev)
cxt->pstore.data = cxt;
/*
- * Since bufsize is only used for dmesg crash dumps, it
- * must match the size of the dprz record (after PRZ header
- * and ECC bytes have been accounted for).
+ * Prepare frontend flags based on which areas are initialized.
+ * For ramoops_init_przs() cases, the "max count" variable tells
+ * if there are regions present. For ramoops_init_prz() cases,
+ * the single region size is how to check.
*/
- cxt->pstore.bufsize = cxt->dprzs[0]->buffer_size;
- cxt->pstore.buf = kzalloc(cxt->pstore.bufsize, GFP_KERNEL);
- if (!cxt->pstore.buf) {
- pr_err("cannot allocate pstore crash dump buffer\n");
- err = -ENOMEM;
- goto fail_clear;
- }
-
- cxt->pstore.flags = PSTORE_FLAGS_DMESG;
+ cxt->pstore.flags = 0;
+ if (cxt->max_dump_cnt)
+ cxt->pstore.flags |= PSTORE_FLAGS_DMESG;
if (cxt->console_size)
cxt->pstore.flags |= PSTORE_FLAGS_CONSOLE;
- if (cxt->ftrace_size)
+ if (cxt->max_ftrace_cnt)
cxt->pstore.flags |= PSTORE_FLAGS_FTRACE;
if (cxt->pmsg_size)
cxt->pstore.flags |= PSTORE_FLAGS_PMSG;
+ /*
+ * Since bufsize is only used for dmesg crash dumps, it
+ * must match the size of the dprz record (after PRZ header
+ * and ECC bytes have been accounted for).
+ */
+ if (cxt->pstore.flags & PSTORE_FLAGS_DMESG) {
+ cxt->pstore.bufsize = cxt->dprzs[0]->buffer_size;
+ cxt->pstore.buf = kzalloc(cxt->pstore.bufsize, GFP_KERNEL);
+ if (!cxt->pstore.buf) {
+ pr_err("cannot allocate pstore crash dump buffer\n");
+ err = -ENOMEM;
+ goto fail_clear;
+ }
+ }
+
err = pstore_register(&cxt->pstore);
if (err) {
pr_err("registering with pstore failed\n");