This is a note to let you know that I've just added the patch titled
ath10k: fix core PCI suspend when WoWLAN is supported but disabled
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ath10k-fix-core-pci-suspend-when-wowlan-is-supported-but-disabled.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Mon Dec 18 13:29:00 CET 2017
From: Brian Norris <briannorris@xxxxxxxxxxxx>
Date: Wed, 4 Oct 2017 12:22:55 +0300
Subject: ath10k: fix core PCI suspend when WoWLAN is supported but disabled
From: Brian Norris <briannorris@xxxxxxxxxxxx>
[ Upstream commit 96378bd2c6cda5f04d0f6da2cd35d4670a982c38 ]
For devices where the FW supports WoWLAN but user-space has not
configured it, we don't do any PCI-specific suspend/resume operations,
because mac80211 doesn't call drv_suspend() when !wowlan. This has
particularly bad effects for some platforms, because we don't stop the
power-save timer, and if this timer goes off after the PCI controller
has suspended the link, Bad Things will happen.
Commit 32faa3f0ee50 ("ath10k: add the PCI PM core suspend/resume ops")
got some of this right, in that it understood there was a problem on
non-WoWLAN firmware. But it forgot the $subject case.
Fix this by moving all the PCI driver suspend/resume logic exclusively
into the driver PM hooks. This shouldn't affect WoWLAN support much
(this just gets executed later on).
I would just as well kill the entirety of ath10k_hif_suspend(), as it's
not even implemented on the USB or SDIO drivers. I expect that we don't
need the callback, except to return "supported" (i.e., 0) or "not
supported" (i.e., -EOPNOTSUPP).
Fixes: 32faa3f0ee50 ("ath10k: add the PCI PM core suspend/resume ops")
Fixes: 77258d409ce4 ("ath10k: enable pci soc powersaving")
Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx>
Cc: Ryan Hsu <ryanhsu@xxxxxxxxxxxxxxxx>
Cc: Kalle Valo <kvalo@xxxxxxxxxxxxxxxx>
Cc: Michal Kazior <michal.kazior@xxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath10k/pci.c | 24 ++++++++++++++----------
1 file changed, 14 insertions(+), 10 deletions(-)
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c
@@ -2581,6 +2581,12 @@ void ath10k_pci_hif_power_down(struct at
static int ath10k_pci_hif_suspend(struct ath10k *ar)
{
+ /* Nothing to do; the important stuff is in the driver suspend. */
+ return 0;
+}
+
+static int ath10k_pci_suspend(struct ath10k *ar)
+{
/* The grace timer can still be counting down and ar->ps_awake be true.
* It is known that the device may be asleep after resuming regardless
* of the SoC powersave state before suspending. Hence make sure the
@@ -2593,6 +2599,12 @@ static int ath10k_pci_hif_suspend(struct
static int ath10k_pci_hif_resume(struct ath10k *ar)
{
+ /* Nothing to do; the important stuff is in the driver resume. */
+ return 0;
+}
+
+static int ath10k_pci_resume(struct ath10k *ar)
+{
struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
struct pci_dev *pdev = ar_pci->pdev;
u32 val;
@@ -3401,11 +3413,7 @@ static __maybe_unused int ath10k_pci_pm_
struct ath10k *ar = dev_get_drvdata(dev);
int ret;
- if (test_bit(ATH10K_FW_FEATURE_WOWLAN_SUPPORT,
- ar->running_fw->fw_file.fw_features))
- return 0;
-
- ret = ath10k_hif_suspend(ar);
+ ret = ath10k_pci_suspend(ar);
if (ret)
ath10k_warn(ar, "failed to suspend hif: %d\n", ret);
@@ -3417,11 +3425,7 @@ static __maybe_unused int ath10k_pci_pm_
struct ath10k *ar = dev_get_drvdata(dev);
int ret;
- if (test_bit(ATH10K_FW_FEATURE_WOWLAN_SUPPORT,
- ar->running_fw->fw_file.fw_features))
- return 0;
-
- ret = ath10k_hif_resume(ar);
+ ret = ath10k_pci_resume(ar);
if (ret)
ath10k_warn(ar, "failed to resume hif: %d\n", ret);
Patches currently in stable-queue which might be from briannorris@xxxxxxxxxxxx are
queue-4.14/ath10k-fix-core-pci-suspend-when-wowlan-is-supported-but-disabled.patch
queue-4.14/ath10k-fix-build-errors-with-config_pm.patch