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s390/qeth: make cmd/reply matching more flexible

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When data is received on the READ channel, the matching logic for cmds
that are waiting for a reply is currently hard-coded into the channel's
main IO callback.
Move this into a per-cmd callback, so that we can apply custom matching
logic for each individual cmd.

This also allows us to remove the coarse-grained check for unexpected
non-IPA replies, since they will no longer match against _all_ pending
cmds.

Note that IDX cmds use _no_ matcher, since their reply is synchronously
received as part of the cmd's IO.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann
2020-01-25 16:53:02 +01:00
committed by David S. Miller
parent 91003f354e
commit 7f92316c53
3 changed files with 39 additions and 12 deletions
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3
drivers/s390/net/qeth_l2_main.c
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@@ -896,7 +896,8 @@ int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
if (!iob)
return -ENOMEM;
qeth_prepare_ipa_cmd(card, iob, (u16) data_len);
qeth_prepare_ipa_cmd(card, iob, (u16) data_len, NULL);
memcpy(__ipa_cmd(iob), data, data_len);
iob->callback = qeth_osn_assist_cb;
return qeth_send_ipa_cmd(card, iob, NULL, NULL);