From 9d792ef17f18734bca823910b89254dec37b50c5 Mon Sep 17 00:00:00 2001 From: Halil Pasic Date: Tue, 14 Dec 2021 15:54:16 +0100 Subject: [PATCH] s390/airq: use DMA memory for summary indicators Protected virtualization guests have to use shared pages for airq notifier bit vectors and summary bytes or bits, thus these need to be allocated as DMA coherent memory. Commit b50623e5db80 ("s390/airq: use DMA memory for adapter interrupts") took care of the notifier bit vectors, but omitted to take care of the summary bytes/bits. In practice this omission is not a big deal, because the summary ain't necessarily allocated here, but can be supplied by the driver. Currently all the I/O we have for SE guests is virtio-ccw, and virtio-ccw uses a self-allocated array of summary indicators. Let us cover all our bases nevertheless! Signed-off-by: Halil Pasic Reviewed-by: Harald Freudenberger Signed-off-by: Vasily Gorbik --- drivers/s390/cio/airq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/s390/cio/airq.c b/drivers/s390/cio/airq.c index e56535c99888f..c0ed364bf4467 100644 --- a/drivers/s390/cio/airq.c +++ b/drivers/s390/cio/airq.c @@ -44,7 +44,7 @@ int register_adapter_interrupt(struct airq_struct *airq) if (!airq->handler || airq->isc > MAX_ISC) return -EINVAL; if (!airq->lsi_ptr) { - airq->lsi_ptr = kzalloc(1, GFP_KERNEL); + airq->lsi_ptr = cio_dma_zalloc(1); if (!airq->lsi_ptr) return -ENOMEM; airq->flags |= AIRQ_PTR_ALLOCATED; @@ -79,7 +79,7 @@ void unregister_adapter_interrupt(struct airq_struct *airq) synchronize_rcu(); isc_unregister(airq->isc); if (airq->flags & AIRQ_PTR_ALLOCATED) { - kfree(airq->lsi_ptr); + cio_dma_free(airq->lsi_ptr, 1); airq->lsi_ptr = NULL; airq->flags &= ~AIRQ_PTR_ALLOCATED; } -- 2.30.2