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Diffstat (limited to 'fs/squashfs/zlib_wrapper.c')
-rw-r--r--fs/squashfs/zlib_wrapper.c50
1 files changed, 15 insertions, 35 deletions
diff --git a/fs/squashfs/zlib_wrapper.c b/fs/squashfs/zlib_wrapper.c
index 55d918fd2d86..bb049027d15c 100644
--- a/fs/squashfs/zlib_wrapper.c
+++ b/fs/squashfs/zlib_wrapper.c
@@ -33,7 +33,7 @@
#include "squashfs.h"
#include "decompressor.h"
-static void *zlib_init(struct squashfs_sb_info *dummy, void *buff, int len)
+static void *zlib_init(struct squashfs_sb_info *dummy, void *buff)
{
z_stream *stream = kmalloc(sizeof(z_stream), GFP_KERNEL);
if (stream == NULL)
@@ -61,15 +61,13 @@ static void zlib_free(void *strm)
}
-static int zlib_uncompress(struct squashfs_sb_info *msblk, void **buffer,
- struct buffer_head **bh, int b, int offset, int length, int srclength,
- int pages)
+static int zlib_uncompress(struct squashfs_sb_info *msblk, void *strm,
+ void **buffer, struct buffer_head **bh, int b, int offset, int length,
+ int srclength, int pages)
{
int zlib_err, zlib_init = 0;
int k = 0, page = 0;
- z_stream *stream = msblk->stream;
-
- mutex_lock(&msblk->read_data_mutex);
+ z_stream *stream = strm;
stream->avail_out = 0;
stream->avail_in = 0;
@@ -78,10 +76,6 @@ static int zlib_uncompress(struct squashfs_sb_info *msblk, void **buffer,
if (stream->avail_in == 0 && k < b) {
int avail = min(length, msblk->devblksize - offset);
length -= avail;
- wait_on_buffer(bh[k]);
- if (!buffer_uptodate(bh[k]))
- goto release_mutex;
-
stream->next_in = bh[k]->b_data + offset;
stream->avail_in = avail;
offset = 0;
@@ -94,12 +88,8 @@ static int zlib_uncompress(struct squashfs_sb_info *msblk, void **buffer,
if (!zlib_init) {
zlib_err = zlib_inflateInit(stream);
- if (zlib_err != Z_OK) {
- ERROR("zlib_inflateInit returned unexpected "
- "result 0x%x, srclength %d\n",
- zlib_err, srclength);
- goto release_mutex;
- }
+ if (zlib_err != Z_OK)
+ goto out;
zlib_init = 1;
}
@@ -109,29 +99,19 @@ static int zlib_uncompress(struct squashfs_sb_info *msblk, void **buffer,
put_bh(bh[k++]);
} while (zlib_err == Z_OK);
- if (zlib_err != Z_STREAM_END) {
- ERROR("zlib_inflate error, data probably corrupt\n");
- goto release_mutex;
- }
+ if (zlib_err != Z_STREAM_END)
+ goto out;
zlib_err = zlib_inflateEnd(stream);
- if (zlib_err != Z_OK) {
- ERROR("zlib_inflate error, data probably corrupt\n");
- goto release_mutex;
- }
-
- if (k < b) {
- ERROR("zlib_uncompress error, data remaining\n");
- goto release_mutex;
- }
+ if (zlib_err != Z_OK)
+ goto out;
- length = stream->total_out;
- mutex_unlock(&msblk->read_data_mutex);
- return length;
+ if (k < b)
+ goto out;
-release_mutex:
- mutex_unlock(&msblk->read_data_mutex);
+ return stream->total_out;
+out:
for (; k < b; k++)
put_bh(bh[k]);