From 23fa18eaa71266feff7ba8d83022d9e1cc83c65a Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:42:03 +0000
Subject: [PATCH] disable pwm7
---
kernel/fs/squashfs/zstd_wrapper.c | 73 ++++++++++++++++--------------------
1 files changed, 33 insertions(+), 40 deletions(-)
diff --git a/kernel/fs/squashfs/zstd_wrapper.c b/kernel/fs/squashfs/zstd_wrapper.c
index eeaabf8..b7cb1fa 100644
--- a/kernel/fs/squashfs/zstd_wrapper.c
+++ b/kernel/fs/squashfs/zstd_wrapper.c
@@ -1,24 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Squashfs - a compressed read only filesystem for Linux
*
* Copyright (c) 2016-present, Facebook, Inc.
* All rights reserved.
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * 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.
- *
* zstd_wrapper.c
*/
#include <linux/mutex.h>
-#include <linux/buffer_head.h>
+#include <linux/bio.h>
#include <linux/slab.h>
#include <linux/zstd.h>
#include <linux/vmalloc.h>
@@ -68,33 +59,44 @@
static int zstd_uncompress(struct squashfs_sb_info *msblk, void *strm,
- struct buffer_head **bh, int b, int offset, int length,
+ struct bio *bio, int offset, int length,
struct squashfs_page_actor *output)
{
struct workspace *wksp = strm;
ZSTD_DStream *stream;
size_t total_out = 0;
- size_t zstd_err;
- int k = 0;
+ int error = 0;
ZSTD_inBuffer in_buf = { NULL, 0, 0 };
ZSTD_outBuffer out_buf = { NULL, 0, 0 };
+ struct bvec_iter_all iter_all = {};
+ struct bio_vec *bvec = bvec_init_iter_all(&iter_all);
stream = ZSTD_initDStream(wksp->window_size, wksp->mem, wksp->mem_size);
if (!stream) {
ERROR("Failed to initialize zstd decompressor\n");
- goto out;
+ return -EIO;
}
out_buf.size = PAGE_SIZE;
out_buf.dst = squashfs_first_page(output);
- do {
- if (in_buf.pos == in_buf.size && k < b) {
- int avail = min(length, msblk->devblksize - offset);
+ for (;;) {
+ size_t zstd_err;
+ if (in_buf.pos == in_buf.size) {
+ const void *data;
+ int avail;
+
+ if (!bio_next_segment(bio, &iter_all)) {
+ error = -EIO;
+ break;
+ }
+
+ avail = min(length, ((int)bvec->bv_len) - offset);
+ data = page_address(bvec->bv_page) + bvec->bv_offset;
length -= avail;
- in_buf.src = bh[k]->b_data + offset;
+ in_buf.src = data + offset;
in_buf.size = avail;
in_buf.pos = 0;
offset = 0;
@@ -106,8 +108,8 @@
/* Shouldn't run out of pages
* before stream is done.
*/
- squashfs_finish_page(output);
- goto out;
+ error = -EIO;
+ break;
}
out_buf.pos = 0;
out_buf.size = PAGE_SIZE;
@@ -116,29 +118,20 @@
total_out -= out_buf.pos;
zstd_err = ZSTD_decompressStream(stream, &out_buf, &in_buf);
total_out += out_buf.pos; /* add the additional data produced */
+ if (zstd_err == 0)
+ break;
- if (in_buf.pos == in_buf.size && k < b)
- put_bh(bh[k++]);
- } while (zstd_err != 0 && !ZSTD_isError(zstd_err));
+ if (ZSTD_isError(zstd_err)) {
+ ERROR("zstd decompression error: %d\n",
+ (int)ZSTD_getErrorCode(zstd_err));
+ error = -EIO;
+ break;
+ }
+ }
squashfs_finish_page(output);
- if (ZSTD_isError(zstd_err)) {
- ERROR("zstd decompression error: %d\n",
- (int)ZSTD_getErrorCode(zstd_err));
- goto out;
- }
-
- if (k < b)
- goto out;
-
- return (int)total_out;
-
-out:
- for (; k < b; k++)
- put_bh(bh[k]);
-
- return -EIO;
+ return error ? error : total_out;
}
const struct squashfs_decompressor squashfs_zstd_comp_ops = {
--
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