mac80211: rt2x00: backport upstream patches

[openwrt/staging/ynezz.git] / package / kernel / mac80211 / patches / rt2x00 / 068-rt2x00usb-remove-unnecessary-rx-flag-checks.patch

diff --git a/package/kernel/mac80211/patches/rt2x00/068-rt2x00usb-remove-unnecessary-rx-flag-checks.patch b/package/kernel/mac80211/patches/rt2x00/068-rt2x00usb-remove-unnecessary-rx-flag-checks.patch
new file mode 100644 (file)
index 0000000..3fa5ee6
--- /dev/null
+++ b/package/kernel/mac80211/patches/rt2x00/068-rt2x00usb-remove-unnecessary-rx-flag-checks.patch
@@ -0,0 +1,51 @@
+From 3b902fa811cf6bf7f9ad0ffb77d0a133e0b3bd61 Mon Sep 17 00:00:00 2001
+From: Soeren Moch <smoch@web.de>
+Date: Mon, 1 Jul 2019 12:53:14 +0200
+Subject: [PATCH 09/15] rt2x00usb: remove unnecessary rx flag checks
+
+In contrast to the TX path, there is no need to separately read the transfer
+status from the device after receiving RX data. Consequently, there is no
+real STATUS_PENDING RX processing queue entry state.
+Remove the unnecessary ENTRY_DATA_STATUS_PENDING flag checks from the RX path.
+Also remove the misleading comment about reading RX status from device.
+
+Suggested-by: Stanislaw Gruszka <sgruszka@redhat.com>
+Signed-off-by: Soeren Moch <smoch@web.de>
+Acked-by: Stanislaw Gruszka <sgruszka@redhat.com>
+Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
+---
+ drivers/net/wireless/ralink/rt2x00/rt2x00usb.c | 9 +++------
+ 1 file changed, 3 insertions(+), 6 deletions(-)
+
+--- a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
++++ b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
+@@ -360,8 +360,7 @@ static void rt2x00usb_work_rxdone(struct
+       while (!rt2x00queue_empty(rt2x00dev->rx)) {
+               entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE);
+ 
+-              if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
+-                  !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
++              if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
+                       break;
+ 
+               /*
+@@ -400,8 +399,7 @@ static void rt2x00usb_interrupt_rxdone(s
+       rt2x00lib_dmadone(entry);
+ 
+       /*
+-       * Schedule the delayed work for reading the RX status
+-       * from the device.
++       * Schedule the delayed work for processing RX data
+        */
+       queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work);
+ }
+@@ -413,8 +411,7 @@ static bool rt2x00usb_kick_rx_entry(stru
+       struct queue_entry_priv_usb *entry_priv = entry->priv_data;
+       int status;
+ 
+-      if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
+-          test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
++      if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
+               return false;
+ 
+       rt2x00lib_dmastart(entry);