From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 32C7E3195FD; Sun, 7 Jun 2026 10:40:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780828833; cv=none; b=dsI6Ow6gHpCsRyQ4Y3NRJZXOUZE7+wdeROd0PNvlLaTSEVF1uYekEf1bwoSwE5mawLCv0w5Mth5a7ZilappCiphznvGxrTlC+cFHplnYCdGeUBYQ2VV7NHNEmxHVMocq9SbZeqBckL+POLyDt8n2MMPV3sy6/K80jnCTzMzAyiQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780828833; c=relaxed/simple; bh=XOAbIzgVLcbhJKvrKaTRQahCmPKiwzog6Wlyoj5lzdM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MAhxpdOibgnNFblxmntI1g1JojP91C4tKgLklElNjm5Fy28ylw+Bwg93whrXpOqQ+GwdtbgE4h+OANQzXJ9Ni1GM/JYZRyZIONI0hKVvZJUeYF1Z0d0ig3w7CW7l2qiWqxQIpBbZO9OBPC4+O6Bct0SRh8XLofCjaUlhxUb+QHc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=JPc2b8DZ; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="JPc2b8DZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 624BE1F00893; Sun, 7 Jun 2026 10:40:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780828832; bh=fj10uKCpPrFS3leCU3UuAsOS1msa5jwhwkavcYLT95Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=JPc2b8DZDVB7J44A6mtGE9pcgNpwqJTZCv6ZkMlN/75Fi6jZbcMGnEgMTrOKTZ9yI v3VUsAVnvuXHo/nvqfZTkUaobu734xW+Vq5QnnG43KXmNRp4QtvwOmQlHdHVsERvQH dT1fcJrW/LqWzmh5C/utAgtg1nFE+uh1hk6ItmvA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Salah Triki , Stable@vger.kernel.org, Jonathan Cameron Subject: [PATCH 6.12 172/307] iio: temperature: tsys01: fix broken PROM checksum validation Date: Sun, 7 Jun 2026 11:59:29 +0200 Message-ID: <20260607095734.035705484@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260607095727.647295505@linuxfoundation.org> References: <20260607095727.647295505@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Salah Triki commit 4701e471c16866e7aa8f5e6a3a6b0d31e097e2c9 upstream. The current implementation of tsys01_crc_valid() incorrectly sums the first word (n_prom[0]) repeatedly instead of iterating over the 8 words retrieved from the PROM. This leads to a checksum mismatch and probe failure on hardware. According to the TSYS01 datasheet, the PROM consists of 8 words. A valid check must iterate through all 8 words to verify the integrity of the calibration data. The current driver only checks the first word 8 times. Note: This fix was identified during a code audit and is based on datasheet specifications. It has not been tested on real hardware. Fixes: 43e53407f680 ("Add tsys01 meas-spec driver support") Signed-off-by: Salah Triki Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/temperature/tsys01.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/iio/temperature/tsys01.c +++ b/drivers/iio/temperature/tsys01.c @@ -119,7 +119,7 @@ static bool tsys01_crc_valid(u16 *n_prom u8 sum = 0; for (cnt = 0; cnt < TSYS01_PROM_WORDS_NB; cnt++) - sum += ((n_prom[0] >> 8) + (n_prom[0] & 0xFF)); + sum += ((n_prom[cnt] >> 8) + (n_prom[cnt] & 0xFF)); return (sum == 0); }