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[PATCH 4/9] util/vfio-helpers: Replace qemu_mutex_lock() calls with QEMU
From: |
Philippe Mathieu-Daudé |
Subject: |
[PATCH 4/9] util/vfio-helpers: Replace qemu_mutex_lock() calls with QEMU_LOCK_GUARD |
Date: |
Tue, 24 Aug 2021 16:11:37 +0200 |
Simplify qemu_vfio_dma_[un]map() handlers by replacing a pair of
qemu_mutex_lock/qemu_mutex_unlock calls by the WITH_QEMU_LOCK_GUARD
macro.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
util/vfio-helpers.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/util/vfio-helpers.c b/util/vfio-helpers.c
index 1d149136299..d956866b4e9 100644
--- a/util/vfio-helpers.c
+++ b/util/vfio-helpers.c
@@ -735,7 +735,7 @@ int qemu_vfio_dma_map(QEMUVFIOState *s, void *host, size_t
size,
assert(QEMU_PTR_IS_ALIGNED(host, qemu_real_host_page_size));
assert(QEMU_IS_ALIGNED(size, qemu_real_host_page_size));
trace_qemu_vfio_dma_map(s, host, size, temporary, iova);
- qemu_mutex_lock(&s->lock);
+ QEMU_LOCK_GUARD(&s->lock);
mapping = qemu_vfio_find_mapping(s, host, &index);
if (mapping) {
iova0 = mapping->iova + ((uint8_t *)host - (uint8_t *)mapping->host);
@@ -778,7 +778,6 @@ int qemu_vfio_dma_map(QEMUVFIOState *s, void *host, size_t
size,
*iova = iova0;
}
out:
- qemu_mutex_unlock(&s->lock);
return ret;
}
@@ -813,14 +812,12 @@ void qemu_vfio_dma_unmap(QEMUVFIOState *s, void *host)
}
trace_qemu_vfio_dma_unmap(s, host);
- qemu_mutex_lock(&s->lock);
+ QEMU_LOCK_GUARD(&s->lock);
m = qemu_vfio_find_mapping(s, host, &index);
if (!m) {
- goto out;
+ return;
}
qemu_vfio_undo_mapping(s, m, NULL);
-out:
- qemu_mutex_unlock(&s->lock);
}
static void qemu_vfio_reset(QEMUVFIOState *s)
--
2.31.1
- [PATCH 0/9] block/nvme: Rework error reporting, Philippe Mathieu-Daudé, 2021/08/24
- [PATCH 1/9] block/nvme: Use safer trace format string, Philippe Mathieu-Daudé, 2021/08/24
- [PATCH 2/9] block/nvme: Have nvme_create_queue_pair() report errors consistently, Philippe Mathieu-Daudé, 2021/08/24
- [PATCH 3/9] util/vfio-helpers: Let qemu_vfio_verify_mappings() use error_report(), Philippe Mathieu-Daudé, 2021/08/24
- [PATCH 4/9] util/vfio-helpers: Replace qemu_mutex_lock() calls with QEMU_LOCK_GUARD,
Philippe Mathieu-Daudé <=
- [PATCH 5/9] util/vfio-helpers: Remove unreachable code in qemu_vfio_dma_map(), Philippe Mathieu-Daudé, 2021/08/24
- [PATCH 6/9] util/vfio-helpers: Pass Error handle to qemu_vfio_dma_map(), Philippe Mathieu-Daudé, 2021/08/24
- [PATCH 7/9] util/vfio-helpers: Have qemu_vfio_dma_map() propagate Error, Philippe Mathieu-Daudé, 2021/08/24
- [PATCH 8/9] util/vfio-helpers: Let qemu_vfio_do_mapping() propagate Error, Philippe Mathieu-Daudé, 2021/08/24