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| author | Julian Wiedmann | 2018-02-09 11:03:50 +0100 |
|---|---|---|
| committer | David S. Miller | 2018-02-09 20:30:23 +0100 |
| commit | 1c5b2216fbb973a9410e0b06389740b5c1289171 (patch) | |
| tree | 577be160ca8f5a410d2d10eeb911c0c7286eb36a /drivers/s390/net/qeth_core_main.c | |
| parent | s390/qeth: fix underestimated count of buffer elements (diff) | |
| download | kernel-qcow2-linux-1c5b2216fbb973a9410e0b06389740b5c1289171.tar.gz kernel-qcow2-linux-1c5b2216fbb973a9410e0b06389740b5c1289171.tar.xz kernel-qcow2-linux-1c5b2216fbb973a9410e0b06389740b5c1289171.zip | |
s390/qeth: fix SETIP command handling
send_control_data() applies some special handling to SETIP v4 IPA
commands. But current code parses *all* command types for the SETIP
command code. Limit the command code check to IPA commands.
Fixes: 5b54e16f1a54 ("qeth: do not spin for SETIP ip assist command")
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net/qeth_core_main.c')
| -rw-r--r-- | drivers/s390/net/qeth_core_main.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 6abd3bc285e4..ca72f3311004 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -2120,7 +2120,7 @@ int qeth_send_control_data(struct qeth_card *card, int len, unsigned long flags; struct qeth_reply *reply = NULL; unsigned long timeout, event_timeout; - struct qeth_ipa_cmd *cmd; + struct qeth_ipa_cmd *cmd = NULL; QETH_CARD_TEXT(card, 2, "sendctl"); @@ -2146,10 +2146,13 @@ int qeth_send_control_data(struct qeth_card *card, int len, while (atomic_cmpxchg(&card->write.irq_pending, 0, 1)) ; qeth_prepare_control_data(card, len, iob); - if (IS_IPA(iob->data)) + if (IS_IPA(iob->data)) { + cmd = __ipa_cmd(iob); event_timeout = QETH_IPA_TIMEOUT; - else + } else { event_timeout = QETH_TIMEOUT; + } + timeout = jiffies + event_timeout; QETH_CARD_TEXT(card, 6, "noirqpnd"); @@ -2174,9 +2177,8 @@ int qeth_send_control_data(struct qeth_card *card, int len, /* we have only one long running ipassist, since we can ensure process context of this command we can sleep */ - cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE); - if ((cmd->hdr.command == IPA_CMD_SETIP) && - (cmd->hdr.prot_version == QETH_PROT_IPV4)) { + if (cmd && cmd->hdr.command == IPA_CMD_SETIP && + cmd->hdr.prot_version == QETH_PROT_IPV4) { if (!wait_event_timeout(reply->wait_q, atomic_read(&reply->received), event_timeout)) goto time_err; |