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Groups > linux.kernel > #1328156

[PATCH 11/30] rapidio/rionet: add shutdown event handling

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Add shutdown notification handler which terminates active connections
with remote RapidIO nodes. This prevents remote nodes from sending packets
to the powered off node and eliminates hardware error events on remote
nodes.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Cc: linux-kernel@vger.kernel.org
Cc: netdev@vger.kernel.org
---
 drivers/net/rionet.c |   38 ++++++++++++++++++++++++++++++++++++++
 1 files changed, 38 insertions(+), 0 deletions(-)

diff --git a/drivers/net/rionet.c b/drivers/net/rionet.c
index d3d6e35..f994fa1 100644
--- a/drivers/net/rionet.c
+++ b/drivers/net/rionet.c
@@ -24,6 +24,7 @@
 #include <linux/skbuff.h>
 #include <linux/crc32.h>
 #include <linux/ethtool.h>
+#include <linux/reboot.h>
 
 #define DRV_NAME        "rionet"
 #define DRV_VERSION     "0.3"
@@ -599,6 +600,30 @@ out:
 	return rc;
 }
 
+static int rionet_shutdown(struct notifier_block *nb, unsigned long code,
+			   void *unused)
+{
+	struct rionet_peer *peer, *tmp;
+	int i;
+
+	pr_debug("%s: %s\n", DRV_NAME, __func__);
+
+	for (i = 0; i < RIONET_MAX_NETS; i++) {
+		if (!nets[i].ndev)
+			continue;
+
+		list_for_each_entry_safe(peer, tmp, &nets[i].peers, node) {
+			if (nets[i].active[peer->rdev->destid]) {
+				rio_send_doorbell(peer->rdev,
+						  RIONET_DOORBELL_LEAVE);
+				nets[i].active[peer->rdev->destid] = NULL;
+			}
+		}
+	}
+
+	return NOTIFY_DONE;
+}
+
 #ifdef MODULE
 static struct rio_device_id rionet_id_table[] = {
 	{RIO_DEVICE(RIO_ANY_ID, RIO_ANY_ID)},
@@ -615,8 +640,20 @@ static struct subsys_interface rionet_interface = {
 	.remove_dev	= rionet_remove_dev,
 };
 
+static struct notifier_block rionet_notifier = {
+	.notifier_call = rionet_shutdown,
+};
+
 static int __init rionet_init(void)
 {
+	int ret;
+
+	ret = register_reboot_notifier(&rionet_notifier);
+	if (ret) {
+		pr_err("%s: failed to register reboot notifier (err=%d)\n",
+		       DRV_NAME, ret);
+		return ret;
+	}
 	return subsys_interface_register(&rionet_interface);
 }
 
@@ -648,6 +685,7 @@ static void __exit rionet_exit(void)
 		}
 	}
 
+	unregister_reboot_notifier(&rionet_notifier);
 	subsys_interface_unregister(&rionet_interface);
 }
 
-- 
1.7.8.4

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[PATCH 00/30] rapidio: mport character driver and subsystem updates Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100
  [PATCH 23/30] rapidio/tsi721: fix locking in OB_MSG processing Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100
  [PATCH 12/30] rapidio: rework common RIO device add/delete routines Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100
  [PATCH 03/30] rapidio/tsi721: fix hardcoded MRRS setting Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100
  [PATCH 17/30] rapidio/rionet: add locking into add/remove device Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100
  [PATCH 08/30] rapidio/tsi721: add query_mport callback Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100
  [PATCH 06/30] rapidio/tsi721_dma: fix pending transaction queue handling Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100
  [PATCH 11/30] rapidio/rionet: add shutdown event handling Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100
  [PATCH 02/30] rapidio/rionet: add capability to change MTU Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100
  [PATCH 10/30] rapidio/tsi721: add shutdown notification callback Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100
  [PATCH 04/30] rapidio/tsi721: add check for overlapped IB window mappings Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100
  [PATCH 19/30] rapidio: add lock protection for doorbell list Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100
  [PATCH 25/30] rapidio/tsi721: add outbound windows mapping support Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100
  [PATCH 24/30] rapidio: add outbound window support Alexandre Bounine <alexandre.bounine@idt.com> - 2016-02-06 00:40 +0100

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