From 396c100472dd63bb1a5389d9dfb25a94943c41c9 Mon Sep 17 00:00:00 2001 From: Julian Wiedmann Date: Sat, 30 Jan 2021 14:56:20 +0100 Subject: s390/qdio: let driver manage the QAOB We are spending way too much effort on qdio-internal bookkeeping for QAOB management & caching, and it's still not robust. Once qdio's TX path has detached the QAOB from a PENDING buffer, we lost all track of it until it shows up in a CQ notification again. So if the device is torn down before that notification arrives, we leak the QAOB. Just have the driver take care of it, and simply pass down a QAOB if they want a TX with async-completion capability. For a buffer in PENDING state that requires the QAOB for final completion, qeth can now also try to recycle the buffer's QAOB rather than unconditionally freeing it. This also eliminates the qdio_outbuf_state array, which was only needed to transfer the aob->user1 tag from the driver to the qdio layer. Signed-off-by: Julian Wiedmann Acked-by: Benjamin Block Signed-off-by: Heiko Carstens --- drivers/s390/scsi/zfcp_qdio.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers/s390/scsi') diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index 23ab16d65f2a..049596cbfb5d 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -128,7 +128,7 @@ static void zfcp_qdio_int_resp(struct ccw_device *cdev, unsigned int qdio_err, /* * put SBALs back to response queue */ - if (do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT, 0, idx, count)) + if (do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT, 0, idx, count, NULL)) zfcp_erp_adapter_reopen(qdio->adapter, 0, "qdires2"); } @@ -298,7 +298,7 @@ int zfcp_qdio_send(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req) atomic_sub(sbal_number, &qdio->req_q_free); retval = do_QDIO(qdio->adapter->ccw_device, QDIO_FLAG_SYNC_OUTPUT, 0, - q_req->sbal_first, sbal_number); + q_req->sbal_first, sbal_number, NULL); if (unlikely(retval)) { /* Failed to submit the IO, roll back our modifications. */ @@ -463,7 +463,8 @@ int zfcp_qdio_open(struct zfcp_qdio *qdio) sbale->addr = 0; } - if (do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT, 0, 0, QDIO_MAX_BUFFERS_PER_Q)) + if (do_QDIO(cdev, QDIO_FLAG_SYNC_INPUT, 0, 0, QDIO_MAX_BUFFERS_PER_Q, + NULL)) goto failed_qdio; /* set index of first available SBALS / number of available SBALS */ -- cgit v1.2.3