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 582B414F6E for ; Mon, 11 Sep 2023 15:29:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C6A95C433C7; Mon, 11 Sep 2023 15:29:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1694446173; bh=kN0ilVn/WfDYWcQIObvS7ZR6aACEk5c9TCgyL83El5I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zPp4XYB2VkIOBgcJGzhYmRf3ICegp/n+pXYVe8SJFpPoDh/mlzF8EJ/40fcY0D0uj t9lNY/tTYtgekzlvJbEa12UmnNsGwBwCG+a7cy+00wn967nqnivSeRpFwmOx19hMAS rVUK06D/X6sMldhW3NL8NZJZX53eDJoExloobuD0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Guenter Roeck , Tzung-Bi Shih Subject: [PATCH 6.1 571/600] platform/chrome: chromeos_acpi: print hex string for ACPI_TYPE_BUFFER Date: Mon, 11 Sep 2023 15:50:04 +0200 Message-ID: <20230911134650.467322535@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230911134633.619970489@linuxfoundation.org> References: <20230911134633.619970489@linuxfoundation.org> User-Agent: quilt/0.67 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 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tzung-Bi Shih commit 0820debb7d489e9eb1f68b7bb69e6ae210699b3f upstream. `element->buffer.pointer` should be binary blob. `%s` doesn't work perfect for them. Print hex string for ACPI_TYPE_BUFFER. Also update the documentation to reflect this. Fixes: 0a4cad9c11ad ("platform/chrome: Add ChromeOS ACPI device driver") Cc: stable@vger.kernel.org Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20230803011245.3773756-1-tzungbi@kernel.org Signed-off-by: Tzung-Bi Shih Signed-off-by: Greg Kroah-Hartman --- Documentation/ABI/testing/sysfs-driver-chromeos-acpi | 2 - drivers/platform/chrome/chromeos_acpi.c | 31 ++++++++++++++++++- 2 files changed, 31 insertions(+), 2 deletions(-) --- a/Documentation/ABI/testing/sysfs-driver-chromeos-acpi +++ b/Documentation/ABI/testing/sysfs-driver-chromeos-acpi @@ -134,4 +134,4 @@ KernelVersion: 5.19 Description: Returns the verified boot data block shared between the firmware verification step and the kernel verification step - (binary). + (hex dump). --- a/drivers/platform/chrome/chromeos_acpi.c +++ b/drivers/platform/chrome/chromeos_acpi.c @@ -90,7 +90,36 @@ static int chromeos_acpi_handle_package( case ACPI_TYPE_STRING: return sysfs_emit(buf, "%s\n", element->string.pointer); case ACPI_TYPE_BUFFER: - return sysfs_emit(buf, "%s\n", element->buffer.pointer); + { + int i, r, at, room_left; + const int byte_per_line = 16; + + at = 0; + room_left = PAGE_SIZE - 1; + for (i = 0; i < element->buffer.length && room_left; i += byte_per_line) { + r = hex_dump_to_buffer(element->buffer.pointer + i, + element->buffer.length - i, + byte_per_line, 1, buf + at, room_left, + false); + if (r > room_left) + goto truncating; + at += r; + room_left -= r; + + r = sysfs_emit_at(buf, at, "\n"); + if (!r) + goto truncating; + at += r; + room_left -= r; + } + + buf[at] = 0; + return at; +truncating: + dev_info_once(dev, "truncating sysfs content for %s\n", name); + sysfs_emit_at(buf, PAGE_SIZE - 4, "..\n"); + return PAGE_SIZE - 1; + } default: dev_err(dev, "element type %d not supported\n", element->type); return -EINVAL;