48 lines
1.5 KiB
Diff
48 lines
1.5 KiB
Diff
From: "Fu, Zhonghui" <zhonghui.fu@linux.intel.com>
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Date: Mon, 11 May 2015 10:41:32 +0800
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Subject: [PATCH] brcmfmac: prohibit ACPI power management for brcmfmac driver
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ACPI will manage WiFi chip's power state during suspend/resume
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process on some tablet platforms(such as ASUS T100TA). This is
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not supported by brcmfmac driver now, and the context of WiFi
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chip will be damaged after resume. This patch informs ACPI not
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to manage WiFi chip's power state.
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Signed-off-by: Zhonghui Fu <zhonghui.fu@linux.intel.com>
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Acked-by: Arend van Spriel <arend@broadcom.com>
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Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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---
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--- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
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+++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
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@@ -33,6 +33,7 @@
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#include <linux/suspend.h>
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#include <linux/errno.h>
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#include <linux/module.h>
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+#include <linux/acpi.h>
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#include <net/cfg80211.h>
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#include <defs.h>
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@@ -1122,6 +1123,8 @@ static int brcmf_ops_sdio_probe(struct s
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int err;
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struct brcmf_sdio_dev *sdiodev;
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struct brcmf_bus *bus_if;
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+ struct device *dev;
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+ struct acpi_device *adev;
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brcmf_dbg(SDIO, "Enter\n");
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brcmf_dbg(SDIO, "Class=%x\n", func->class);
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@@ -1129,6 +1132,12 @@ static int brcmf_ops_sdio_probe(struct s
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brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
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brcmf_dbg(SDIO, "Function#: %d\n", func->num);
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+ /* prohibit ACPI power management for this device */
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+ dev = &func->dev;
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+ adev = ACPI_COMPANION(dev);
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+ if (adev)
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+ adev->flags.power_manageable = 0;
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+
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/* Consume func num 1 but dont do anything with it. */
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if (func->num == 1)
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return 0;
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