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authorUrsula Braun <ursula.braun@de.ibm.com>2011-02-02 06:04:33 +0000
committerDavid S. Miller <davem@davemloft.net>2011-02-02 15:00:00 -0800
commit8b2e18f662939fb3d9b0ffe5da953ba56d259e3a (patch)
tree3cd4bab1b27b8efdacf2818a8aaaec89fff42cec /drivers/s390/net
parent9853b97bccbd2b08ce5fef497f21fa7395f68823 (diff)
downloadlinux-linaro-android-8b2e18f662939fb3d9b0ffe5da953ba56d259e3a.tar.gz
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 <ursula.braun@de.ibm.com> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net')
-rw-r--r--drivers/s390/net/qeth_core_main.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index ddeef41049a..eca3e094031 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);