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authorDavid Bauer <mail@david-bauer.net>2019-10-04 22:28:15 +0200
committerDavid Bauer <mail@david-bauer.net>2019-10-06 21:28:49 +0200
commit97c37f8dd067fd4750a64bcaa639e6d08462060d (patch)
treeacb0625e1af066a75c0ccb3e175b7e79fe71983e /package/kernel/mac80211/patches
parent34e2526f9fcc4d528a65d264775e989425eb253c (diff)
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mac80211: ath10k: fix latency issue for QCA988x
This backport fixes high latency (>100ms) on the WiFi link when using a QCA988x Wave 1 radio. The ath10k-ct driver is not affected by this bug from my testing, hence why it hasn't been discovered earlier. Signed-off-by: David Bauer <mail@david-bauer.net>
Diffstat (limited to 'package/kernel/mac80211/patches')
-rw-r--r--package/kernel/mac80211/patches/ath/982-ath10k-fix-latency-issue-for-QCA988x.patch42
1 files changed, 42 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/ath/982-ath10k-fix-latency-issue-for-QCA988x.patch b/package/kernel/mac80211/patches/ath/982-ath10k-fix-latency-issue-for-QCA988x.patch
new file mode 100644
index 0000000000..3702abb412
--- /dev/null
+++ b/package/kernel/mac80211/patches/ath/982-ath10k-fix-latency-issue-for-QCA988x.patch
@@ -0,0 +1,42 @@
+From: Miaoqing Pan <miaoqing@codeaurora.org>
+Subject: [PATCH] ath10k: fix latency issue for QCA988x
+Date: Thu, 29 Aug 2019 10:45:12 +0800
+
+Bad latency is found on QCA988x, the issue was introduced by
+commit 4504f0e5b571 ("ath10k: sdio: workaround firmware UART
+pin configuration bug"). If uart_pin_workaround is false, this
+change will set uart pin even if uart_print is false.
+
+Tested HW: QCA9880
+Tested FW: 10.2.4-1.0-00037
+
+Fixes: 4504f0e5b571 ("ath10k: sdio: workaround firmware UART pin configuration bug")
+Signed-off-by: Miaoqing Pan <miaoqing@codeaurora.org>
+---
+ drivers/net/wireless/ath/ath10k/core.c | 15 +++++++++------
+ 1 file changed, 9 insertions(+), 6 deletions(-)
+
+--- a/drivers/net/wireless/ath/ath10k/core.c
++++ b/drivers/net/wireless/ath/ath10k/core.c
+@@ -2124,12 +2124,15 @@ static int ath10k_init_uart(struct ath10
+ return ret;
+ }
+
+- if (!uart_print && ar->hw_params.uart_pin_workaround) {
+- ret = ath10k_bmi_write32(ar, hi_dbg_uart_txpin,
+- ar->hw_params.uart_pin);
+- if (ret) {
+- ath10k_warn(ar, "failed to set UART TX pin: %d", ret);
+- return ret;
++ if (!uart_print) {
++ if (ar->hw_params.uart_pin_workaround) {
++ ret = ath10k_bmi_write32(ar, hi_dbg_uart_txpin,
++ ar->hw_params.uart_pin);
++ if (ret) {
++ ath10k_warn(ar, "failed to set UART TX pin: %d",
++ ret);
++ return ret;
++ }
+ }
+
+ return 0;