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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/crypto/bcm/spu.c
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@@ -1,17 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright 2016 Broadcom
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License, version 2, as
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- * published by the Free Software Foundation (the "GPL").
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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- * General Public License version 2 (GPLv2) for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * version 2 (GPLv2) along with this source code.
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  */
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 #include <linux/kernel.h>
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@@ -21,9 +10,6 @@
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 #include "spu.h"
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 #include "spum.h"
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 #include "cipher.h"
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-
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-/* This array is based on the hash algo type supported in spu.h */
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-char *tag_to_hash_idx[] = { "none", "md5", "sha1", "sha224", "sha256" };
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 char *hash_alg_name[] = { "None", "md5", "sha1", "sha224", "sha256", "aes",
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 	"sha384", "sha512", "sha3_224", "sha3_256", "sha3_384", "sha3_512" };
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@@ -235,10 +221,6 @@
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 			case CIPHER_ALG_3DES:
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 				cipher_key_len = 24;
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 				name = "3DES";
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-				break;
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-			case CIPHER_ALG_RC4:
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-				cipher_key_len = 260;
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-				name = "ARC4";
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 				break;
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 			case CIPHER_ALG_AES:
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 				switch (cipher_type) {
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@@ -933,21 +915,16 @@
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  * @spu_req_hdr_len: Length in bytes of the SPU request header
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  * @isInbound:       0 encrypt, 1 decrypt
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  * @cipher_parms:    Parameters describing cipher operation to be performed
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- * @update_key:      If true, rewrite the cipher key in SCTX
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  * @data_size:       Length of the data in the BD field
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  *
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  * Assumes much of the header was already filled in at setkey() time in
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  * spum_cipher_req_init().
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- * spum_cipher_req_init() fills in the encryption key. For RC4, when submitting
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- * a request for a non-first chunk, we use the 260-byte SUPDT field from the
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- * previous response as the key. update_key is true for this case. Unused in all
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- * other cases.
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+ * spum_cipher_req_init() fills in the encryption key.
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  */
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 void spum_cipher_req_finish(u8 *spu_hdr,
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 			    u16 spu_req_hdr_len,
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 			    unsigned int is_inbound,
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 			    struct spu_cipher_parms *cipher_parms,
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-			    bool update_key,
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 			    unsigned int data_size)
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 {
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 	struct SPUHEADER *spuh;
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@@ -962,11 +939,6 @@
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 	flow_log(" in: %u\n", is_inbound);
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 	flow_log(" cipher alg: %u, cipher_type: %u\n", cipher_parms->alg,
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 		 cipher_parms->type);
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-	if (update_key) {
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-		flow_log(" cipher key len: %u\n", cipher_parms->key_len);
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-		flow_dump("  key: ", cipher_parms->key_buf,
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-			  cipher_parms->key_len);
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-	}
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 	/*
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 	 * In XTS mode, API puts "i" parameter (block tweak) in IV.  For
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@@ -994,13 +966,6 @@
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 		cipher_bits |= CIPHER_INBOUND;
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 	else
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 		cipher_bits &= ~CIPHER_INBOUND;
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-
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-	/* update encryption key for RC4 on non-first chunk */
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-	if (update_key) {
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-		spuh->sa.cipher_flags |=
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-			cipher_parms->type << CIPHER_TYPE_SHIFT;
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-		memcpy(spuh + 1, cipher_parms->key_buf, cipher_parms->key_len);
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-	}
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 	if (cipher_parms->alg && cipher_parms->iv_buf && cipher_parms->iv_len)
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 		/* cipher iv provided so put it in here */