Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751564AbbD0FAy (ORCPT ); Mon, 27 Apr 2015 01:00:54 -0400 Received: from mga09.intel.com ([134.134.136.24]:3280 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751257AbbD0FAw (ORCPT ); Mon, 27 Apr 2015 01:00:52 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,655,1422950400"; d="scan'208";a="562181525" Message-ID: <553DC280.6080503@linux.intel.com> Date: Mon, 27 Apr 2015 13:00:48 +0800 From: "Fu, Zhonghui" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 MIME-Version: 1.0 To: "brudley@broadcom.com" , Arend van Spriel , Franky Lin , "meuleman@broadcom.com" , Kalle Valo , "pieterpg@broadcom.com" , "hdegoede@redhat.com" , "linux-wireless@vger.kernel.org" , "brcm80211-dev-list@broadcom.com" , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: [PATCH 1/2] brcmfmac: prohibit ACPI power management for brcmfmac driver Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1652 Lines: 42 ACPI will manage WiFi chip's power state during suspend/resume process on some tablet platforms(such as ASUS T100TA). This is not supported by brcmfmac driver now, and the context of WiFi chip will be damaged after resume. This patch disconnects the relationship between WiFi chip and it's ACPI companion, and prohibit ACPI PM for it. Signed-off-by: Zhonghui Fu --- drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c index 9b508bd..fdf8feb 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c @@ -1114,6 +1114,7 @@ static int brcmf_ops_sdio_probe(struct sdio_func *func, int err; struct brcmf_sdio_dev *sdiodev; struct brcmf_bus *bus_if; + struct device *dev; brcmf_dbg(SDIO, "Enter\n"); brcmf_dbg(SDIO, "Class=%x\n", func->class); @@ -1121,6 +1122,10 @@ static int brcmf_ops_sdio_probe(struct sdio_func *func, brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device); brcmf_dbg(SDIO, "Function#: %d\n", func->num); + /* prohibit ACPI power management for this device */ + dev = &func->dev; + dev->fwnode = NULL; + /* Consume func num 1 but dont do anything with it. */ if (func->num == 1) return 0; -- 1.7.1 -- 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/