/*
 * uncompress.c
 *
 * (C) Copyright 1999 Linus Torvalds
 *
 * cramfs interfaces to the uncompression library. There's really just
 * three entrypoints:
 *
 *  - cramfs_uncompress_init() - called to initialize the thing.
 *  - cramfs_uncompress_exit() - tell me when you're done
 *  - cramfs_uncompress_block() - uncompress a block.
 *
 * NOTE NOTE NOTE! The uncompression is entirely single-threaded. We
 * only have one stream, and we'll initialize it only once even if it
 * then is used by multiple filesystems.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/vmalloc.h>
#include <linux/zlib.h>
#include "internal.h"

static z_stream stream;
static int initialized;

/* Returns length of decompressed data. */
int cramfs_uncompress_block(void *dst, int dstlen, void *src, int srclen)
{
	int err;

	stream.next_in = src;
	stream.avail_in = srclen;

	stream.next_out = dst;
	stream.avail_out = dstlen;

	err = zlib_inflateReset(&stream);
	if (err != Z_OK) {
		pr_err("zlib_inflateReset error %d\n", err);
		zlib_inflateEnd(&stream);
		zlib_inflateInit(&stream);
	}

	err = zlib_inflate(&stream, Z_FINISH);
	if (err != Z_STREAM_END)
		goto err;
	return stream.total_out;

err:
	pr_err("Error %d while decompressing!\n", err);
	pr_err("%p(%d)->%p(%d)\n", src, srclen, dst, dstlen);
	return -EIO;
}

int cramfs_uncompress_init(void)
{
	if (!initialized++) {
		stream.workspace = vmalloc(zlib_inflate_workspacesize());
		if (!stream.workspace) {
			initialized = 0;
			return -ENOMEM;
		}
		stream.next_in = NULL;
		stream.avail_in = 0;
		zlib_inflateInit(&stream);
	}
	return 0;
}

void cramfs_uncompress_exit(void)
{
	if (!--initialized) {
		zlib_inflateEnd(&stream);
		vfree(stream.workspace);
	}
}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>tools</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>perf</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/pmu-events?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>pmu-events</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/pmu-events/arch?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>arch</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/pmu-events/arch/x86?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>x86</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/pmu-events/arch/x86/broadwellx?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>broadwellx</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/pmu-events/arch/x86/broadwellx/virtual-memory.json?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>virtual-memory.json</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='c73e44269369e936165f0f9b61f1f09a11dae01c'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Vincent &lt;vincent.stehle@laposte.net&gt;</td><td class='right'>2017-01-30 15:06:43 +0100</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-31 13:07:40 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/pmu-events/arch/x86/broadwellx/virtual-memory.json?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>c73e44269369e936165f0f9b61f1f09a11dae01c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/perf/pmu-events/arch/x86/broadwellx/virtual-memory.json?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>patch</a>)</td></tr>
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<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/pmu-events/arch/x86/broadwellx/virtual-memory.json?id=040587af31228d82c52267f717c9fcdb65f36335'>040587af31228d82c52267f717c9fcdb65f36335</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/pmu-events/arch/x86/broadwellx/virtual-memory.json?id=c73e44269369e936165f0f9b61f1f09a11dae01c&amp;id2=040587af31228d82c52267f717c9fcdb65f36335'>diff</a>)</td></tr></table>
<div class='commit-subject'>net: thunderx: avoid dereferencing xcv when NULL</div><div class='commit-msg'>This fixes the following smatch and coccinelle warnings:

  drivers/net/ethernet/cavium/thunder/thunder_xcv.c:119 xcv_setup_link() error: we previously assumed 'xcv' could be null (see line 118) [smatch]
  drivers/net/ethernet/cavium/thunder/thunder_xcv.c:119:16-20: ERROR: xcv is NULL but dereferenced. [coccinelle]

Fixes: 6465859aba1e66a5 ("net: thunderx: Add RGMII interface type support")
Signed-off-by: Vincent Stehlé &lt;vincent.stehle@laposte.net&gt;
Cc: Sunil Goutham &lt;sgoutham@cavium.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>Diffstat</a> (limited to 'tools/perf/pmu-events/arch/x86/broadwellx/virtual-memory.json')</div><table summary='diffstat' class='diffstat'>