mac80211: update brcmfmac including missing boardrev workaround

[openwrt.git] / package / kernel / mac80211 / patches / 345-brcmfmac-Remove-waitqueue_active-check.patch

diff --git a/package/kernel/mac80211/patches/345-brcmfmac-Remove-waitqueue_active-check.patch b/package/kernel/mac80211/patches/345-brcmfmac-Remove-waitqueue_active-check.patch
new file mode 100644 (file)
index 0000000..39f4383
--- /dev/null
+++ b/package/kernel/mac80211/patches/345-brcmfmac-Remove-waitqueue_active-check.patch
@@ -0,0 +1,54 @@
+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);
+       }
+ }
+