From b1311a46aef17301cccb3e2f1e014e4d32d8af3d Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 15 Sep 2022 19:09:39 -0400 Subject: [PATCH] fix 'direction' argument of iov_iter_{init,bvec}() [ Upstream commit e3bf3df824675ea9cadc3cd2c75d08ee83a6ae26 ] READ means "data destination", WRITE - "data source". Signed-off-by: Al Viro Stable-dep-of: 6dd88fd59da8 ("vhost-scsi: unbreak any layout for response") Signed-off-by: Sasha Levin --- drivers/vhost/vhost.c | 6 +++--- drivers/vhost/vringh.c | 4 ++-- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 547f89a6940f3..c234869d67279 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -833,7 +833,7 @@ static int vhost_copy_to_user(struct vhost_virtqueue *vq, void __user *to, VHOST_ACCESS_WO); if (ret < 0) goto out; - iov_iter_init(&t, WRITE, vq->iotlb_iov, ret, size); + iov_iter_init(&t, READ, vq->iotlb_iov, ret, size); ret = copy_to_iter(from, size, &t); if (ret == size) ret = 0; @@ -872,7 +872,7 @@ static int vhost_copy_from_user(struct vhost_virtqueue *vq, void *to, (unsigned long long) size); goto out; } - iov_iter_init(&f, READ, vq->iotlb_iov, ret, size); + iov_iter_init(&f, WRITE, vq->iotlb_iov, ret, size); ret = copy_from_iter(to, size, &f); if (ret == size) ret = 0; @@ -2136,7 +2136,7 @@ static int get_indirect(struct vhost_virtqueue *vq, vq_err(vq, "Translation failure %d in indirect.\n", ret); return ret; } - iov_iter_init(&from, READ, vq->indirect, ret, len); + iov_iter_init(&from, WRITE, vq->indirect, ret, len); count = len / sizeof desc; /* Buffers are chained via a 16 bit next field, so * we can have at most 2^16 of these. */ diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c index 828c293065657..139c782848c67 100644 --- a/drivers/vhost/vringh.c +++ b/drivers/vhost/vringh.c @@ -1161,7 +1161,7 @@ static inline int copy_from_iotlb(const struct vringh *vrh, void *dst, else if (ret < 0) return ret; - iov_iter_bvec(&iter, READ, iov, ret, translated); + iov_iter_bvec(&iter, WRITE, iov, ret, translated); ret = copy_from_iter(dst, translated, &iter); if (ret < 0) @@ -1194,7 +1194,7 @@ static inline int copy_to_iotlb(const struct vringh *vrh, void *dst, else if (ret < 0) return ret; - iov_iter_bvec(&iter, WRITE, iov, ret, translated); + iov_iter_bvec(&iter, READ, iov, ret, translated); ret = copy_to_iter(src, translated, &iter); if (ret < 0) -- 2.39.5