xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mac802154: cfg: add suspend and resume callbacks

Browse Source 
This patch introduces suspend and resume callbacks to mac802154. When
doing suspend we calling the stop driver callback which should stop the
receiving of frames. A transceiver should go into low-power mode then.
Calling resume will call the start driver callback, which starts receiving
again and allow to transmit frames.

This was tested only with the fakelb driver and a qemu vm by doing the
following commands:

echo "devices" > /sys/power/pm_test
echo "freeze" > /sys/power/state

while doing some high traffic between two fakelb phys.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring
2015-06-24 11:36:36 +02:00
committed by Marcel Holtmann
parent a6cb869b3b
commit 3cf24cf8c3
3 changed files with 54 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
net/mac802154/rx.c
View File

@@ -253,6 +253,9 @@ void ieee802154_rx(struct ieee802154_hw *hw, struct sk_buff *skb)
WARN_ON_ONCE(softirq_count() == 0);
if (local->suspended)
goto drop;
/* TODO: When a transceiver omits the checksum here, we
* add an own calculated one. This is currently an ugly
* solution because the monitor needs a crc here.
@@ -273,8 +276,7 @@ void ieee802154_rx(struct ieee802154_hw *hw, struct sk_buff *skb)
crc = crc_ccitt(0, skb->data, skb->len);
if (crc) {
rcu_read_unlock();
kfree_skb(skb);
return;
goto drop;
}
}
/* remove crc */
@@ -283,6 +285,10 @@ void ieee802154_rx(struct ieee802154_hw *hw, struct sk_buff *skb)
__ieee802154_rx_handle_packet(local, skb);
rcu_read_unlock();
return;
drop:
kfree_skb(skb);
}
EXPORT_SYMBOL(ieee802154_rx);