From: Ursula Braun Date: Wed, 2 Feb 2011 06:04:33 +0000 (+0000) Subject: qeth: allow HiperSockets framesize change in suspend X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8b2e18f662939fb3d9b0ffe5da953ba56d259e3a;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git qeth: allow HiperSockets framesize change in suspend For HiperSockets the framesize-definition determines the selected mtu-size and the size of the allocated qdio buffers. A framesize-change may occur while a Linux system with probed HiperSockets device is in suspend state. This patch enables proper resuming of a HiperSockets device in this case. Signed-off-by: Ursula Braun Signed-off-by: Frank Blaschka Signed-off-by: David S. Miller --- diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index ddeef41049ae..eca3e094031a 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -1887,8 +1887,16 @@ static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply, QETH_DBF_TEXT_(SETUP, 2, " rc%d", iob->rc); return 0; } - card->info.max_mtu = mtu; + if (card->info.initial_mtu && (card->info.initial_mtu != mtu)) { + /* frame size has changed */ + if (card->dev && + ((card->dev->mtu == card->info.initial_mtu) || + (card->dev->mtu > mtu))) + card->dev->mtu = mtu; + qeth_free_qdio_buffers(card); + } card->info.initial_mtu = mtu; + card->info.max_mtu = mtu; card->qdio.in_buf_size = mtu + 2 * PAGE_SIZE; } else { card->info.initial_mtu = qeth_get_initial_mtu_for_card(card);