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brcmfmac: prohibit ACPI power management for brcmfmac driver

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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>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Fu, Zhonghui 2015-05-11 10:41:32 +08:00 committed by Kalle Valo
parent bfe3d2bf6c
commit f0992ace68
1 changed files with 9 additions and 0 deletions
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9
drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
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@ -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>
@ -1122,6 +1123,8 @@ 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);
@ -1129,6 +1132,12 @@ 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;