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-rw-r--r--fs/io_uring.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 69910fd9ccca..b998e98acd01 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2576,7 +2576,8 @@ static __poll_t io_uring_poll(struct file *file, poll_table *wait)
poll_wait(file, &ctx->cq_wait, wait);
/* See comment at the top of this file */
smp_rmb();
- if (READ_ONCE(ctx->sq_ring->r.tail) + 1 != ctx->cached_sq_head)
+ if (READ_ONCE(ctx->sq_ring->r.tail) - ctx->cached_sq_head !=
+ ctx->sq_ring->ring_entries)
mask |= EPOLLOUT | EPOLLWRNORM;
if (READ_ONCE(ctx->cq_ring->r.head) != ctx->cached_cq_tail)
mask |= EPOLLIN | EPOLLRDNORM;