From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3274C46467 for ; Tue, 3 Jan 2023 14:47:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237778AbjACOqs (ORCPT ); Tue, 3 Jan 2023 09:46:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55268 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237290AbjACOqq (ORCPT ); Tue, 3 Jan 2023 09:46:46 -0500 X-Greylist: delayed 508 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Tue, 03 Jan 2023 06:46:44 PST Received: from smtp97.iad3a.emailsrvr.com (smtp97.iad3a.emailsrvr.com [173.203.187.97]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B443011C23 for ; Tue, 3 Jan 2023 06:46:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mev.co.uk; s=20221208-6x11dpa4; t=1672756696; bh=raLLg04Q27BCx4M0eo9jN8NQ6JGjtQUYVf+RsKoKD7o=; h=From:To:Subject:Date:From; b=Iy0S4B41ZgnTSCYIxlKtm0cziIZPmMLpPGBYUztmodM3h38W+3t8tx+6bIHdLC2Vd pNmQS3NmKY7izEvj9sbchfddom3XX/OMqLCraz8Xgi3KmmIwtEgvbVYSHVVG7VG+tF D7utxVWuFwEJ8fuETVZOOCyWd5RA1zQwZUS5qUTU= X-Auth-ID: abbotti@mev.co.uk Received: by smtp29.relay.iad3a.emailsrvr.com (Authenticated sender: abbotti-AT-mev.co.uk) with ESMTPSA id 752FA22242; Tue, 3 Jan 2023 09:38:15 -0500 (EST) From: Ian Abbott To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , Ian Abbott , H Hartley Sweeten , stable@vger.kernel.org Subject: [PATCH] comedi: adv_pci1760: Fix PWM instruction handling Date: Tue, 3 Jan 2023 14:37:54 +0000 Message-Id: <20230103143754.17564-1-abbotti@mev.co.uk> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Classification-ID: c86974ef-dacd-49ee-8fd1-dc1fc4a19be1-1-1 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org (Actually, this is fixing the "Read the Current Status" command sent to the device's outgoing mailbox, but it is only currently used for the PWM instructions.) The PCI-1760 is operated mostly by sending commands to a set of Outgoing Mailbox registers, waiting for the command to complete, and reading the result from the Incoming Mailbox registers. One of these commands is the "Read the Current Status" command. The number of this command is 0x07 (see the User's Manual for the PCI-1760 at . The `PCI1760_CMD_GET_STATUS` macro defined in the driver should expand to this command number 0x07, but unfortunately it currently expands to 0x03. (Command number 0x03 is not defined in the User's Manual.) Correct the definition of the `PCI1760_CMD_GET_STATUS` macro to fix it. This is used by all the PWM subdevice related instructions handled by `pci1760_pwm_insn_config()` which are probably all broken. The effect of sending the undefined command number 0x03 is not known. Fixes: 14b93bb6bbf0 ("staging: comedi: adv_pci_dio: separate out PCI-1760 support") Cc: # v4.5+ Signed-off-by: Ian Abbott --- drivers/comedi/drivers/adv_pci1760.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/comedi/drivers/adv_pci1760.c b/drivers/comedi/drivers/adv_pci1760.c index fcfc2e299110..27f3890f471d 100644 --- a/drivers/comedi/drivers/adv_pci1760.c +++ b/drivers/comedi/drivers/adv_pci1760.c @@ -58,7 +58,7 @@ #define PCI1760_CMD_CLR_IMB2 0x00 /* Clears IMB2 */ #define PCI1760_CMD_SET_DO 0x01 /* Set output state */ #define PCI1760_CMD_GET_DO 0x02 /* Read output status */ -#define PCI1760_CMD_GET_STATUS 0x03 /* Read current status */ +#define PCI1760_CMD_GET_STATUS 0x07 /* Read current status */ #define PCI1760_CMD_GET_FW_VER 0x0e /* Read firmware version */ #define PCI1760_CMD_GET_HW_VER 0x0f /* Read hardware version */ #define PCI1760_CMD_SET_PWM_HI(x) (0x10 + (x) * 2) /* Set "hi" period */ -- 2.35.1