From: "Fu, Zhonghui" <zhonghui.fu@linux.intel.com>
To: "brudley@broadcom.com" <brudley@broadcom.com>,
Arend van Spriel <arend@broadcom.com>,
Franky Lin <frankyl@broadcom.com>,
"meuleman@broadcom.com" <meuleman@broadcom.com>,
Kalle Valo <kvalo@codeaurora.org>,
"pieterpg@broadcom.com" <pieterpg@broadcom.com>,
"hdegoede@redhat.com" <hdegoede@redhat.com>,
"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>,
"brcm80211-dev-list@broadcom.com"
<brcm80211-dev-list@broadcom.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: [PATCH v3] brcmfmac: prohibit ACPI power management for brcmfmac driver
Date: Mon, 11 May 2015 10:41:32 +0800 [thread overview]
Message-ID: <555016DC.804@linux.intel.com> (raw)
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 <zhonghui.fu@linux.intel.com>
Acked-by: Arend van Spriel <arend@broadcom.com>
---
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 <linux/suspend.h>
#include <linux/errno.h>
#include <linux/module.h>
+#include <linux/acpi.h>
#include <net/cfg80211.h>
#include <defs.h>
@@ -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
next reply other threads:[~2015-05-11 2:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-11 2:41 Fu, Zhonghui [this message]
[not found] ` <555016DC.804-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2015-05-18 6:26 ` [PATCH v3] brcmfmac: prohibit ACPI power management for brcmfmac driver Fu, Zhonghui
2015-05-20 9:02 ` Arend van Spriel
2015-05-26 3:52 ` Fu, Zhonghui
2015-05-26 10:46 ` Kalle Valo
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