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Revision cfacfefd382af3b42905108b54f02820dca225c4 authored by Peter Ujfalusi on 17 September 2021, 08:51:08 UTC, committed by Mark Brown on 17 September 2021, 12:16:36 UTC 
ASoC: SOF: trace: Omit error print when waking up trace sleepers
 
Do not print error message from snd_sof_trace_notify_for_error() when
possible sleeping trace work is woken up to flush the remaining debug
information.

This action by itself is not an error, it is just an action we take when
an error occurs to make sure that all information have been fed to the
userspace (if we have trace in use).

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210917085108.25532-1-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
1 parent 3abe2ee
Raw File
blowfish_generic.c 
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Cryptographic API.
 *
 * Blowfish Cipher Algorithm, by Bruce Schneier.
 * http://www.counterpane.com/blowfish.html
 *
 * Adapted from Kerneli implementation.
 *
 * Copyright (c) Herbert Valerio Riedel <hvr@hvrlab.org>
 * Copyright (c) Kyle McMartin <kyle@debian.org>
 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
 */
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <asm/unaligned.h>
#include <linux/crypto.h>
#include <linux/types.h>
#include <crypto/blowfish.h>

/*
 * Round loop unrolling macros, S is a pointer to a S-Box array
 * organized in 4 unsigned longs at a row.
 */
#define GET32_3(x) (((x) & 0xff))
#define GET32_2(x) (((x) >> (8)) & (0xff))
#define GET32_1(x) (((x) >> (16)) & (0xff))
#define GET32_0(x) (((x) >> (24)) & (0xff))

#define bf_F(x) (((S[GET32_0(x)] + S[256 + GET32_1(x)]) ^ \
		S[512 + GET32_2(x)]) + S[768 + GET32_3(x)])

#define ROUND(a, b, n) ({ b ^= P[n]; a ^= bf_F(b); })

static void bf_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	struct bf_ctx *ctx = crypto_tfm_ctx(tfm);
	const u32 *P = ctx->p;
	const u32 *S = ctx->s;
	u32 yl = get_unaligned_be32(src);
	u32 yr = get_unaligned_be32(src + 4);

	ROUND(yr, yl, 0);
	ROUND(yl, yr, 1);
	ROUND(yr, yl, 2);
	ROUND(yl, yr, 3);
	ROUND(yr, yl, 4);
	ROUND(yl, yr, 5);
	ROUND(yr, yl, 6);
	ROUND(yl, yr, 7);
	ROUND(yr, yl, 8);
	ROUND(yl, yr, 9);
	ROUND(yr, yl, 10);
	ROUND(yl, yr, 11);
	ROUND(yr, yl, 12);
	ROUND(yl, yr, 13);
	ROUND(yr, yl, 14);
	ROUND(yl, yr, 15);

	yl ^= P[16];
	yr ^= P[17];

	put_unaligned_be32(yr, dst);
	put_unaligned_be32(yl, dst + 4);
}

static void bf_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	struct bf_ctx *ctx = crypto_tfm_ctx(tfm);
	const u32 *P = ctx->p;
	const u32 *S = ctx->s;
	u32 yl = get_unaligned_be32(src);
	u32 yr = get_unaligned_be32(src + 4);

	ROUND(yr, yl, 17);
	ROUND(yl, yr, 16);
	ROUND(yr, yl, 15);
	ROUND(yl, yr, 14);
	ROUND(yr, yl, 13);
	ROUND(yl, yr, 12);
	ROUND(yr, yl, 11);
	ROUND(yl, yr, 10);
	ROUND(yr, yl, 9);
	ROUND(yl, yr, 8);
	ROUND(yr, yl, 7);
	ROUND(yl, yr, 6);
	ROUND(yr, yl, 5);
	ROUND(yl, yr, 4);
	ROUND(yr, yl, 3);
	ROUND(yl, yr, 2);

	yl ^= P[1];
	yr ^= P[0];

	put_unaligned_be32(yr, dst);
	put_unaligned_be32(yl, dst + 4);
}

static struct crypto_alg alg = {
	.cra_name		=	"blowfish",
	.cra_driver_name	=	"blowfish-generic",
	.cra_priority		=	100,
	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize		=	BF_BLOCK_SIZE,
	.cra_ctxsize		=	sizeof(struct bf_ctx),
	.cra_module		=	THIS_MODULE,
	.cra_u			=	{ .cipher = {
	.cia_min_keysize	=	BF_MIN_KEY_SIZE,
	.cia_max_keysize	=	BF_MAX_KEY_SIZE,
	.cia_setkey		=	blowfish_setkey,
	.cia_encrypt		=	bf_encrypt,
	.cia_decrypt		=	bf_decrypt } }
};

static int __init blowfish_mod_init(void)
{
	return crypto_register_alg(&alg);
}

static void __exit blowfish_mod_fini(void)
{
	crypto_unregister_alg(&alg);
}

subsys_initcall(blowfish_mod_init);
module_exit(blowfish_mod_fini);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Blowfish Cipher Algorithm");
MODULE_ALIAS_CRYPTO("blowfish");
MODULE_ALIAS_CRYPTO("blowfish-generic");
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