s390/qeth: command-chain the IDX sequence

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The current IDX sequence first sends one WRITE cmd to activate the
device, and then sends a second cmd that READs the response.

Using qeth_alloc_cmd(), we can combine this into a single IO with two
command-chained CCWs.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Julian Wiedmann 2019-06-11 18:37:59 +02:00 • committed by David S. Miller

parent 2066e1db9e

commit f3b783b1d0

1 changed files with 14 additions and 44 deletions

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58

drivers/s390/net/qeth_core_main.c

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