diff options
| author | Daniel Drake <dsd@laptop.org> | 2012-04-18 18:08:21 +0100 |
|---|---|---|
| committer | Matthew Garrett <mjg@redhat.com> | 2012-05-31 14:23:39 -0400 |
| commit | bc7ab495c7532f06bc03021c0d78ac384fb13c14 (patch) | |
| tree | 099863503d7c95b356bab64fd88e831ec8e9b4b8 /drivers/platform | |
| parent | 14b234b10544046544a81095c9ab372842f80eea (diff) | |
| download | linux-stable-bc7ab495c7532f06bc03021c0d78ac384fb13c14.tar.gz linux-stable-bc7ab495c7532f06bc03021c0d78ac384fb13c14.tar.bz2 linux-stable-bc7ab495c7532f06bc03021c0d78ac384fb13c14.zip | |
xo1-rfkill: only act when blocked state is changed
The XO-1 rfkill driver should only send EC commands when changing
between blocked/unblocked state.
The rfkill switch is asked to be unblocked on every resume (even when
the card was never blocked before) and sending a EC_WLAN_LEAVE_RESET
command here upsets the resume sequence of the libertas driver. Adding
the check to avoid the spurious EC_WLAN_LEAVE_RESET fixes the wifi resume
behaviour.
The rfkill state is maintained by the hardware over suspend/resume
so no extra consideration is needed here.
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/xo1-rfkill.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/platform/x86/xo1-rfkill.c b/drivers/platform/x86/xo1-rfkill.c index 41781ed8301c..b57ad8641480 100644 --- a/drivers/platform/x86/xo1-rfkill.c +++ b/drivers/platform/x86/xo1-rfkill.c @@ -15,15 +15,26 @@ #include <asm/olpc.h> +static bool card_blocked; + static int rfkill_set_block(void *data, bool blocked) { unsigned char cmd; + int r; + + if (blocked == card_blocked) + return 0; + if (blocked) cmd = EC_WLAN_ENTER_RESET; else cmd = EC_WLAN_LEAVE_RESET; - return olpc_ec_cmd(cmd, NULL, 0, NULL, 0); + r = olpc_ec_cmd(cmd, NULL, 0, NULL, 0); + if (r == 0) + card_blocked = blocked; + + return r; } static const struct rfkill_ops rfkill_ops = { |