s390/qdio: reset old sbal_state flags

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commit 64e03ff726 upstream.

When allocating a new AOB fails, handle_outbound() is still capable of
transmitting the selected buffer (just without async completion).

But if a previous transfer on this queue slot used async completion, its
sbal_state flags field is still set to QDIO_OUTBUF_STATE_FLAG_PENDING.
So when the upper layer driver sees this stale flag, it expects an async
completion that never happens.

Fix this by unconditionally clearing the flags field.

Fixes: 104ea556ee ("qdio: support asynchronous delivery of storage blocks")
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

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Julian Wiedmann 2018-05-16 09:37:25 +02:00 • committed by Ben Hutchings

parent 3cb01937c1

commit 0184414f3d

2 changed files with 2 additions and 4 deletions

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1

arch/s390/include/asm/qdio.h

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5

drivers/s390/cio/qdio_main.c

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