| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 46/68] qeth: delete napi struct when removing a qeth device | Date | Mon, 8 Aug 2016 21:11:21 +0200 |
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4.4-stable review patch. If anyone has any objections, please let me know.
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From: Ursula Braun <ubraun@linux.vnet.ibm.com>
commit 7831b4ff0d926e0deeaabef9db8800ed069a2757 upstream.
A qeth_card contains a napi_struct linked to the net_device during device probing. This struct must be deleted when removing the qeth device, otherwise Panic on oops can occur when qeth devices are repeatedly removed and added.
Fixes: a1c3ed4c9ca ("qeth: NAPI support for l2 and l3 discipline") Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Tested-by: Alexander Klein <ALKL@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/s390/net/qeth_l2_main.c | 1 + drivers/s390/net/qeth_l3_main.c | 1 + 2 files changed, 2 insertions(+)
--- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -1051,6 +1051,7 @@ static void qeth_l2_remove_device(struct qeth_l2_set_offline(cgdev); if (card->dev) { + netif_napi_del(&card->napi); unregister_netdev(card->dev); card->dev = NULL; } --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -3246,6 +3246,7 @@ static void qeth_l3_remove_device(struct qeth_l3_set_offline(cgdev); if (card->dev) { + netif_napi_del(&card->napi); unregister_netdev(card->dev); card->dev = NULL; }
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