From: Miaoqing Pan <miaoqing@codeaurora.org>
To: ath10k@lists.infradead.org
Cc: linux-wireless@vger.kernel.org, Miaoqing Pan <miaoqing@codeaurora.org>
Subject: [PATCH] ath10k: fix PCIE device wake up failed
Date: Thu, 30 May 2019 09:49:20 +0800 [thread overview]
Message-ID: <1559180960-13565-1-git-send-email-miaoqing@codeaurora.org> (raw)
Observed PCIE device wake up failed after ~120 iterations of
soft-reboot test. The error message is
"ath10k_pci 0000:01:00.0: failed to wake up device : -110"
The call trace as below:
ath10k_pci_probe -> ath10k_pci_force_wake -> ath10k_pci_wake_wait ->
ath10k_pci_is_awake
Once trigger the device to wake up, we will continuously check the RTC
state until it returns RTC_STATE_V_ON or timeout.
But for QCA99x0 chips, we use wrong value for RTC_STATE_V_ON.
Occasionally, we get 0x7 on the fist read, we thought as a failure
case, but actually is the right value, also verified with the spec.
So fix the issue by changing RTC_STATE_V_ON from 0x5 to 0x7, passed
~2000 iterations.
Tested HW: QCA9984
Signed-off-by: Miaoqing Pan <miaoqing@codeaurora.org>
---
drivers/net/wireless/ath/ath10k/hw.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath10k/hw.c b/drivers/net/wireless/ath/ath10k/hw.c
index ad082b7..b242085 100644
--- a/drivers/net/wireless/ath/ath10k/hw.c
+++ b/drivers/net/wireless/ath/ath10k/hw.c
@@ -158,7 +158,7 @@
};
const struct ath10k_hw_values qca99x0_values = {
- .rtc_state_val_on = 5,
+ .rtc_state_val_on = 7,
.ce_count = 12,
.msi_assign_ce_max = 12,
.num_target_ce_config_wlan = 10,
--
1.9.1
next reply other threads:[~2019-05-30 1:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-30 1:49 Miaoqing Pan [this message]
2019-06-25 13:03 ` [PATCH] ath10k: fix PCIE device wake up failed Kalle Valo
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