From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Fu, Zhonghui" Subject: [PATCH v2] brcmfmac: prohibit ACPI power management for brcmfmac driver Date: Sun, 03 May 2015 23:26:17 +0800 Message-ID: <55463E19.7070709@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit To: "brudley-dY08KVG/lbpWk0Htik3J/w@public.gmane.org" , Arend van Spriel , Franky Lin , "meuleman-dY08KVG/lbpWk0Htik3J/w@public.gmane.org" , Kalle Valo , "pieterpg-dY08KVG/lbpWk0Htik3J/w@public.gmane.org" , "hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org" , "linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "brcm80211-dev-list-dY08KVG/lbpWk0Htik3J/w@public.gmane.org" , "netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" Return-path: Sender: linux-wireless-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org 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 --- Changes in v2: - Another implementation. drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c index 9b508bd..6c519e3 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 +1124,11 @@ 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; + if (adev = ACPI_COMPANION(dev)) + 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-wireless" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html