HSI: ssi_protocol: fix ssip_xmit invocation

ssip_xmit should be called from process context,
since it calls hsi_async_write.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/hsi/clients/ssi_protocol.c b/drivers/hsi/clients/ssi_protocol.c
index 2388857db14b..6031cd146556 100644
--- a/drivers/hsi/clients/ssi_protocol.c
+++ b/drivers/hsi/clients/ssi_protocol.c
@@ -150,6 +150,7 @@ struct ssi_protocol {
         struct net_device       *netdev;
         struct list_head        txqueue;
         struct list_head        cmdqueue;
+        struct work_struct      work;
         struct hsi_client       *cl;
         struct list_head        link;
         atomic_t                tx_usecnt;
@@ -968,6 +969,15 @@ static int ssip_pn_set_mtu(struct net_device *dev, int new_mtu)
         return 0;
 }
 
+static void ssip_xmit_work(struct work_struct *work)
+{
+        struct ssi_protocol *ssi =
+                                container_of(work, struct ssi_protocol, work);
+        struct hsi_client *cl = ssi->cl;
+
+        ssip_xmit(cl);
+}
+
 static int ssip_pn_xmit(struct sk_buff *skb, struct net_device *dev)
 {
         struct hsi_client *cl = to_hsi_client(dev->dev.parent);
@@ -1020,7 +1030,7 @@ static int ssip_pn_xmit(struct sk_buff *skb, struct net_device *dev)
                 dev_dbg(&cl->device, "Start TX on SEND READY qlen %d\n",
                                                         ssi->txqueue_len);
                 spin_unlock_bh(&ssi->lock);
-                ssip_xmit(cl);
+                schedule_work(&ssi->work);
         } else {
                 spin_unlock_bh(&ssi->lock);
         }
@@ -1097,6 +1107,7 @@ static int ssi_protocol_probe(struct device *dev)
         atomic_set(&ssi->tx_usecnt, 0);
         hsi_client_set_drvdata(cl, ssi);
         ssi->cl = cl;
+        INIT_WORK(&ssi->work, ssip_xmit_work);
 
         ssi->channel_id_cmd = hsi_get_channel_id_by_name(cl, "mcsaab-control");
         if (ssi->channel_id_cmd < 0) {