From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 623DB372ED8; Mon, 16 Mar 2026 21:17:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773695843; cv=none; b=I5o10eHRbng/E8x0KEHSRVY0RFaFVr8TiHKq7xJk/hETUeOxoREXIAvWuHCDVZiA7+Fa3/rbOmhJ8GAS0rHrwBiFCk9dt16szOncDwLT0INSV1r6MtW2QphsufsNvw9xn7gx4pjwZkC0oVPMTWbYF9cISq+7Qu69qefXLxTJ0qA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773695843; c=relaxed/simple; bh=stK4sYe/AduQ6uXwjj3mRomo/JyzTjLstba5Bk6cJA8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=bb44b4dxa9qSivdJQFjF7qJ0KOt0dwuD7GSDRAgao0dGw7sk6upW6i6zHdkoxkJZCldiILAZ3juMCsSnTgxjSv3lrQu+pxT4QaL1vAQffHGvqkOasTIhsBQ29e9X700xOtC1j0UIGTWuT7wSeLO9/iLbZtjEpQZgBChIx/5gy/8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cnnjw4fg; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="cnnjw4fg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6FC15C19421; Mon, 16 Mar 2026 21:17:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773695842; bh=stK4sYe/AduQ6uXwjj3mRomo/JyzTjLstba5Bk6cJA8=; h=From:To:Cc:Subject:Date:From; b=cnnjw4fgqa6bIzxFQQ2o2aj4iFeLLt9w6G0Rpar99nsO4AtzYik+Mk8/fasPMMGOA C14ypWbjzNkkFx8vNKxfRCTA5p9qlr4as+jcC7dD+erNleVN6wYVZhO9CfgkHF/bmC yND+TTNyhhMeX5bzTv7JLrToq6O6DpdM95vv33l39sJu8DP3SynGNm+dF26Z2kHBDL BZetGocGrvaT0EamXyLqtrCV8TzFnl962yhM5sRckZ+3stTGBgiRkDqmIlhpBeRsmy 5V59Bnt4/h4+6Iojsu/u4NjOrSyC12EiNTPQ4jxGKLjVIRn1gIn+67EjnYhUzVePVJ V0k93mhwMNdEg== From: Eric Biggers To: "Daniel W . S . Almeida" , Mauro Carvalho Chehab , linux-media@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Ard Biesheuvel , Eric Biggers Subject: [PATCH] media: vidtv: Use crc32_be() instead of open coding Date: Mon, 16 Mar 2026 14:15:42 -0700 Message-ID: <20260316211542.50912-1-ebiggers@kernel.org> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit dvb_crc32() does exactly the same computation as the crc32_be() library function. Just call crc32_be() instead. Signed-off-by: Eric Biggers --- drivers/media/test-drivers/vidtv/Kconfig | 1 + drivers/media/test-drivers/vidtv/vidtv_psi.c | 57 +------------------- 2 files changed, 2 insertions(+), 56 deletions(-) diff --git a/drivers/media/test-drivers/vidtv/Kconfig b/drivers/media/test-drivers/vidtv/Kconfig index e511e51c0b5b..8cb10b75603b 100644 --- a/drivers/media/test-drivers/vidtv/Kconfig +++ b/drivers/media/test-drivers/vidtv/Kconfig @@ -1,9 +1,10 @@ # SPDX-License-Identifier: GPL-2.0-only config DVB_VIDTV tristate "Virtual DVB Driver (vidtv)" depends on DVB_CORE && MEDIA_SUPPORT && I2C + select CRC32 help The virtual DVB test driver serves as a reference DVB driver and helps validate the existing APIs in the media subsystem. It can also aid developers working on userspace applications. diff --git a/drivers/media/test-drivers/vidtv/vidtv_psi.c b/drivers/media/test-drivers/vidtv/vidtv_psi.c index 685a1f7b2fb1..1b6225d65ef3 100644 --- a/drivers/media/test-drivers/vidtv/vidtv_psi.c +++ b/drivers/media/test-drivers/vidtv/vidtv_psi.c @@ -29,65 +29,10 @@ #define CRC_SIZE_IN_BYTES 4 #define MAX_VERSION_NUM 32 #define INITIAL_CRC 0xffffffff #define ISO_LANGUAGE_CODE_LEN 3 -static const u32 CRC_LUT[256] = { - /* from libdvbv5 */ - 0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b, - 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61, - 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7, - 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75, - 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, - 0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039, - 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef, - 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d, - 0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, - 0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, - 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0, - 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072, - 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4, - 0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, - 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08, - 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba, - 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc, - 0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6, - 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050, - 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2, - 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34, - 0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637, - 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1, - 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53, - 0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, - 0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff, - 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9, - 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b, - 0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, - 0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, - 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71, - 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3, - 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, - 0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, - 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e, - 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec, - 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a, - 0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, - 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676, - 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4, - 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662, - 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668, - 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4 -}; - -static u32 dvb_crc32(u32 crc, u8 *data, u32 len) -{ - /* from libdvbv5 */ - while (len--) - crc = (crc << 8) ^ CRC_LUT[((crc >> 24) ^ *data++) & 0xff]; - return crc; -} - static void vidtv_psi_update_version_num(struct vidtv_psi_table_header *h) { h->version++; } @@ -173,11 +118,11 @@ static u32 vidtv_psi_ts_psi_write_into(struct psi_write_args *args) if (!args->crc && !args->is_crc) pr_warn_ratelimited("Missing CRC for chunk\n"); if (args->crc) - *args->crc = dvb_crc32(*args->crc, args->from, args->len); + *args->crc = crc32_be(*args->crc, args->from, args->len); if (args->new_psi_section && !aligned) { pr_warn_ratelimited("Cannot write a new PSI section in a misaligned buffer\n"); /* forcibly align and hope for the best */ base-commit: 2d1373e4246da3b58e1df058374ed6b101804e07 -- 2.53.0