brcmfmac: prohibit ACPI power management for brcmfmac driver
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>
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
index 8a69544..b0d0ff5 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>
@@ -1122,6 +1123,8 @@
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 @@
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;