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 60386435532; Tue, 21 Jul 2026 22:10:07 +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=1784671808; cv=none; b=Aq9rQkxylFJM5VbVzS1zNz/muSEUcG0p57jUtBJU4rxejtAezKDonxyoaYDGJmqM9vCPzKX7Wcq6jGg06ccdGzUFPXNtFDdpiNyLZ+CcG+pRf4pDcV4RmeyaZZZD0vVaIHsuHhhIgYLYMzweSxZh6kxLTly2T8SrNGG2uzxLhxM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784671808; c=relaxed/simple; bh=OrvbZeBW4CZ/CtWHjekAAJr6UImrS3crwqO8RyzO7hw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gab/CU048eJ4GcmnSRDmHhf1TWr8U7wZkrxGsw6SQ+tpmlTyziS1Ql/nCCGokSRYpyuv9/px2SFTJZOU9QC7+gEG6KT8OBtD6LkMvn7TcScPC65jmd4P5LSi4BGzlBeDzTMev7XcOZDXrccoQwBGFtQfnTPZrjr87S9lDmC12zk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=hMtSP1h8; 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="hMtSP1h8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7516C1F000E9; Tue, 21 Jul 2026 22:10:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784671807; bh=2Z+skCLmerUGb746NHDlj2VcWhsUEO7OAala7TOsaiM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=hMtSP1h8sMYNlJAQUj0BQziQtJXy8sGtmE1+DE0PKyxpBnR6ccHSRgaD0dK3RWfyU hIe9oz5vm98dYOqW+n7nVgEMzpGZV6d7SVLfgjM4y9CoRPcpWqNZBD0+c6dqIM8i3w Ofzs9O6xWFrvVtEbdIjRebVlptZWdB9v2zJWYHmg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, sashiko-bot , Joshua Crofts , Jonathan Cameron , Sasha Levin Subject: [PATCH 5.15 385/843] iio: light: si1133: reset counter to prevent race condition Date: Tue, 21 Jul 2026 17:20:20 +0200 Message-ID: <20260721152414.698142630@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152405.946368001@linuxfoundation.org> References: <20260721152405.946368001@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Joshua Crofts [ Upstream commit 0a5f45ed2342aabae1e32c72558d15be28940a95 ] Sashiko reported a potential race condition happening when the driver returns an errno after a timeout in the si1133_command() function. The premature exit causes the hardware and software counters to become out of sync by not updating data->rsp_seq, therefore the internal hardware counter keeps incrementing. Fix this by adding a call to si1133_cmd_reset_counter() before returning from timeout. Fixes: e01e7eaf37d8 ("iio: light: introduce si1133") Reported-by: sashiko-bot Closes: https://sashiko.dev/#/message/20260428-si1133-checkup-v2-5-70ad14bfefe2%40gmail.com Assisted-by: gemini:gemini-3.1-pro-preview Signed-off-by: Joshua Crofts Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/iio/light/si1133.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/iio/light/si1133.c b/drivers/iio/light/si1133.c index f8c9b2cc322e8d..17ee203d16a274 100644 --- a/drivers/iio/light/si1133.c +++ b/drivers/iio/light/si1133.c @@ -427,6 +427,11 @@ static int si1133_command(struct si1133_data *data, u8 cmd) dev_warn(dev, "Failed to read command 0x%02x, ret=%d\n", cmd, err); + /* + * Reset counter on err to prevent software and hardware + * counters being out of sync. + */ + si1133_cmd_reset_counter(data); goto out; } } -- 2.53.0