rt2x00: fix rfkill regression on rt2500pci

commit 616a8394b5df8c88f4dd416f4527439a4e365034 upstream.

As reported by Niels, starting rfkill polling during device probe
(commit e2bc7c5, generally sane change) broke rfkill on rt2500pci
device. I considered that bug as some initalization issue, which
should be fixed on rt2500pci specific code. But after several
attempts (see bug report for details) we fail to find working solution.
Hence I decided to revert to old behaviour on rt2500pci to fix
regression.

Additionally patch also unregister rfkill on device remove instead
of ifconfig down, what was another issue introduced by bad commit.

Bug report:
https://bugzilla.kernel.org/show_bug.cgi?id=73821

Fixes: e2bc7c5f3cb8 ("rt2x00: Fix rfkill_polling register function.")
Bisected-by: Niels <nille0386@googlemail.com>
Reported-and-tested-by: Niels <nille0386@googlemail.com>
Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>

diff --git a/drivers/net/wireless/rt2x00/rt2500pci.c b/drivers/net/wireless/rt2x00/rt2500pci.c
index 0ac5c589ddceaffe7dd0f7d82ce7a508e37e4bd7..13f557a44a6273cdaf530ac60e5157938ef39786 100644 (file)
--- a/drivers/net/wireless/rt2x00/rt2500pci.c
+++ b/drivers/net/wireless/rt2x00/rt2500pci.c
@@ -1684,8 +1684,13 @@ static int rt2500pci_init_eeprom(struct rt2x00_dev *rt2x00dev)
        /*
         * Detect if this device has an hardware controlled radio.
         */
-       if (rt2x00_get_field16(eeprom, EEPROM_ANTENNA_HARDWARE_RADIO))
+       if (rt2x00_get_field16(eeprom, EEPROM_ANTENNA_HARDWARE_RADIO)) {
                __set_bit(CAPABILITY_HW_BUTTON, &rt2x00dev->cap_flags);
+               /*
+                * On this device RFKILL initialized during probe does not work.
+                */
+               __set_bit(REQUIRE_DELAYED_RFKILL, &rt2x00dev->cap_flags);
+       }
 
        /*
         * Check if the BBP tuning should be enabled.

diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h
index fe4c572db52c2749317690b75ad4cc296aec5157..89dbf2db93dadb0dd9e8ce4544110b19cce79e46 100644 (file)
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -705,6 +705,7 @@ enum rt2x00_capability_flags {
        REQUIRE_SW_SEQNO,
        REQUIRE_HT_TX_DESC,
        REQUIRE_PS_AUTOWAKE,
+       REQUIRE_DELAYED_RFKILL,
 
        /*
         * Capabilities

diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
index f12e909cbb48099422e0a20cce644c38ed44450d..6ccfa0a671e75e7b7e8eb28e1af08b6ef7d9e1be 100644 (file)
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -1128,9 +1128,10 @@ static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
                return;
 
        /*
-        * Unregister extra components.
+        * Stop rfkill polling.
         */
-       rt2x00rfkill_unregister(rt2x00dev);
+       if (test_bit(REQUIRE_DELAYED_RFKILL, &rt2x00dev->cap_flags))
+               rt2x00rfkill_unregister(rt2x00dev);
 
        /*
         * Allow the HW to uninitialize.
@@ -1168,6 +1169,12 @@ static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
 
        set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags);
 
+       /*
+        * Start rfkill polling.
+        */
+       if (test_bit(REQUIRE_DELAYED_RFKILL, &rt2x00dev->cap_flags))
+               rt2x00rfkill_register(rt2x00dev);
+
        return 0;
 }
 
@@ -1377,7 +1384,12 @@ int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
        rt2x00link_register(rt2x00dev);
        rt2x00leds_register(rt2x00dev);
        rt2x00debug_register(rt2x00dev);
-       rt2x00rfkill_register(rt2x00dev);
+
+       /*
+        * Start rfkill polling.
+        */
+       if (!test_bit(REQUIRE_DELAYED_RFKILL, &rt2x00dev->cap_flags))
+               rt2x00rfkill_register(rt2x00dev);
 
        return 0;
 
@@ -1392,6 +1404,12 @@ void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
 {
        clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
 
+       /*
+        * Stop rfkill polling.
+        */
+       if (!test_bit(REQUIRE_DELAYED_RFKILL, &rt2x00dev->cap_flags))
+               rt2x00rfkill_unregister(rt2x00dev);
+
        /*
         * Disable radio.
         */