Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754909AbaF3ItR (ORCPT ); Mon, 30 Jun 2014 04:49:17 -0400 Received: from lnfm1.sai.msu.ru ([93.180.26.255]:56890 "EHLO lnfm1.sai.msu.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751231AbaF3ItQ (ORCPT ); Mon, 30 Jun 2014 04:49:16 -0400 Date: Mon, 30 Jun 2014 12:48:45 +0400 (MSK) From: "Matwey V. Kornilov" To: gregkh@linuxfoundation.org cc: linux-kernel@vger.kernel.org, linux-parport@lists.infradead.org, hsommer@eso.org, matwey.kornilov@gmail.com Subject: [PATCH 2/2] parport: parport_pc: Add force_epp module option for parport_pc. Message-ID: User-Agent: Alpine 2.00 (LRH 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >From f5384f47688c116ac765b18bfb01e28b4233b97f Mon Sep 17 00:00:00 2001 From: "Matwey V. Kornilov" Date: Wed, 25 Jun 2014 01:08:45 +0400 Subject: [PATCH 2/2] parport: parport_pc: Add force_epp module option for parport_pc. The detection of Intel EPP bug is known to produce much false positives. The new option is introduced to force enable EPP in spite of the test result. Tested-by: Heiko Andreas Sommer Signed-off-by: Matwey V. Kornilov --- drivers/parport/parport_pc.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c index 4b851bb..1a15b9c 100644 --- a/drivers/parport/parport_pc.c +++ b/drivers/parport/parport_pc.c @@ -105,6 +105,9 @@ static int user_specified; (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO)) static int verbose_probing; #endif +#ifdef CONFIG_PARPORT_1284 +static int force_epp; +#endif static int pci_registered_parport; static int pnp_registered_parport; @@ -1765,7 +1768,7 @@ static int parport_EPP_supported(struct parport *pb) return 0; /* No way to clear timeout */ /* Check for Intel bug. */ - if (intel_bug_present(pb)) + if (!force_epp && intel_bug_present(pb)) return 0; pb->modes |= PARPORT_MODE_EPP; @@ -3148,6 +3151,10 @@ module_param_array(dma, charp, NULL, 0); MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation"); module_param(verbose_probing, int, 0644); #endif +#ifdef CONFIG_PARPORT_1284 +MODULE_PARM_DESC(force_epp, "Do not disable EPP when it is detected to be broken (default is false)"); +module_param(force_epp, int, 0); +#endif #ifdef CONFIG_PCI static char *init_mode; MODULE_PARM_DESC(init_mode, -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/