From: Henrique de Moraes Holschuh Date: Thu, 3 Jul 2008 16:14:57 +0000 (-0300) Subject: rfkill: ignore errors from rfkill_toggle_radio in rfkill_add_switch X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=fd4484af7c02b31bcb6090eeb0d85cf947719f2d;p=openwrt%2Fstaging%2Fblogic.git rfkill: ignore errors from rfkill_toggle_radio in rfkill_add_switch rfkill_add_switch() calls rfkill_toggle_radio() to set the state of a recently registered rfkill class to the current global state [for that rfkill->type]. The rfkill_toggle_radio() call is going to error out if the hardware is RFKILL_STATE_HARD_BLOCKED, and the global state is RFKILL_STATE_UNBLOCKED. That is a quite normal situation which I missed to account for. As things stand, the error return from rfkill_toggle_radio ends up causing rfkill_register to bail out with an error (de-registering the new switch in the process), which is Not Nice. Change rfkill_add_switch() to not return errors because of a failed call to rfkill_toggle_radio(). We can go back to returning errors again (if that's indeed the right thing to do) if we define the exact error codes the rfkill->toggle_radio callbacks are to return in each situation, so that we can ignore the right ones only. Bug reported by "kionez ". Signed-off-by: Henrique de Moraes Holschuh Cc: kionez Acked-by: Ivo van Doorn Signed-off-by: John W. Linville --- diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c index aa7039dfa19d..7a560b785097 100644 --- a/net/rfkill/rfkill.c +++ b/net/rfkill/rfkill.c @@ -501,17 +501,15 @@ static struct class rfkill_class = { static int rfkill_add_switch(struct rfkill *rfkill) { - int error; - mutex_lock(&rfkill_mutex); - error = rfkill_toggle_radio(rfkill, rfkill_states[rfkill->type], 0); - if (!error) - list_add_tail(&rfkill->node, &rfkill_list); + rfkill_toggle_radio(rfkill, rfkill_states[rfkill->type], 0); + + list_add_tail(&rfkill->node, &rfkill_list); mutex_unlock(&rfkill_mutex); - return error; + return 0; } static void rfkill_remove_switch(struct rfkill *rfkill)