Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752320AbbEKCln (ORCPT ); Sun, 10 May 2015 22:41:43 -0400 Received: from mga14.intel.com ([192.55.52.115]:50364 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751561AbbEKCll (ORCPT ); Sun, 10 May 2015 22:41:41 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,403,1427785200"; d="scan'208";a="726988918" Message-ID: <555016DC.804@linux.intel.com> Date: Mon, 11 May 2015 10:41:32 +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 v3] 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: 1981 Lines: 56 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 informs ACPI not to manage WiFi chip's power state. Signed-off-by: Zhonghui Fu Acked-by: Arend van Spriel --- Changes in v3: - Have the assignment separate for the if statement. drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-) diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c index 9b508bd..c960a12 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c @@ -33,6 +33,7 @@ #include #include #include +#include #include #include @@ -1114,6 +1115,8 @@ 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; + struct acpi_device *adev; brcmf_dbg(SDIO, "Enter\n"); brcmf_dbg(SDIO, "Class=%x\n", func->class); @@ -1121,6 +1124,12 @@ 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; + adev = ACPI_COMPANION(dev); + if (adev) + adev->flags.power_manageable = 0; + /* 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/