mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 10:08:59 +00:00
55 lines
2.2 KiB
Diff
55 lines
2.2 KiB
Diff
From: Hui Wang <hui.wang@canonical.com>
|
|
Date: Wed, 9 Mar 2016 15:25:26 +0800
|
|
Subject: [PATCH] brcmfmac: Remove waitqueue_active check
|
|
|
|
We met a problem of pm_suspend when repeated closing/opening the lid
|
|
on a Lenovo laptop (1/20 reproduce rate), below is the log:
|
|
|
|
[ 199.735876] PM: Entering mem sleep
|
|
[ 199.750516] e1000e: EEE TX LPI TIMER: 00000011
|
|
[ 199.856638] Trying to free nonexistent resource <000000000000d000-000000000000d0ff>
|
|
[ 201.753566] brcmfmac: brcmf_pcie_suspend: Timeout on response for entering D3 substate
|
|
[ 201.753581] pci_legacy_suspend(): brcmf_pcie_suspend+0x0/0x1f0 [brcmfmac] returns -5
|
|
[ 201.753585] dpm_run_callback(): pci_pm_suspend+0x0/0x160 returns -5
|
|
[ 201.753589] PM: Device 0000:04:00.0 failed to suspend async: error -5
|
|
|
|
Through debugging, we found when problem happens, it is not the device
|
|
fails to enter D3, but the signal D3_ACK comes too early to pass the
|
|
waitqueue_active() check.
|
|
|
|
Just like this:
|
|
brcmf_pcie_send_mb_data(devinfo, BRCMF_H2D_HOST_D3_INFORM);
|
|
// signal is triggered here
|
|
wait_event_timeout(devinfo->mbdata_resp_wait, devinfo->mbdata_completed,
|
|
BRCMF_PCIE_MBDATA_TIMEOUT);
|
|
|
|
So far I think it is safe to remove waitqueue_active check since there
|
|
is only one place to trigger this signal (sending
|
|
BRCMF_H2D_HOST_D3_INFORM). And it is not a problem calling wake_up
|
|
event earlier than calling wait_event.
|
|
|
|
Cc: Brett Rudley <brudley@broadcom.com>
|
|
Cc: Hante Meuleman <meuleman@broadcom.com>
|
|
Cc: Franky (Zhenhui) Lin <frankyl@broadcom.com>
|
|
Cc: Pieter-Paul Giesberts <pieterpg@broadcom.com>
|
|
Cc: Arend van Spriel <arend@broadcom.com>
|
|
Signed-off-by: Hui Wang <hui.wang@canonical.com>
|
|
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
|
|
---
|
|
|
|
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
|
|
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
|
|
@@ -677,10 +677,8 @@ static void brcmf_pcie_handle_mb_data(st
|
|
brcmf_dbg(PCIE, "D2H_MB_DATA: DEEP SLEEP EXIT\n");
|
|
if (dtoh_mb_data & BRCMF_D2H_DEV_D3_ACK) {
|
|
brcmf_dbg(PCIE, "D2H_MB_DATA: D3 ACK\n");
|
|
- if (waitqueue_active(&devinfo->mbdata_resp_wait)) {
|
|
- devinfo->mbdata_completed = true;
|
|
- wake_up(&devinfo->mbdata_resp_wait);
|
|
- }
|
|
+ devinfo->mbdata_completed = true;
|
|
+ wake_up(&devinfo->mbdata_resp_wait);
|
|
}
|
|
}
|
|
|