[PATCH] libbpf: Use the correct fd when attaching to perf events

[Sultan Alsawaf]

From: Sultan Alsawaf <sul...@kerneltoast.com>

We should be using the program fd here, not the perf event fd.

Fixes: 63f2f5ee856ba ("libbpf: add ability to attach/detach BPF program to perf 
event")
Signed-off-by: Sultan Alsawaf <sul...@kerneltoast.com>
---
 tools/lib/bpf/libbpf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index d43cc3f29dae..3d20d57d4af5 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -9538,7 +9538,7 @@ struct bpf_link *bpf_program__attach_perf_event(struct 
bpf_program *prog,
        if (!link)
                return ERR_PTR(-ENOMEM);
        link->detach = &bpf_link__detach_perf_event;
-       link->fd = pfd;
+       link->fd = prog_fd;
 
        if (ioctl(pfd, PERF_EVENT_IOC_SET_BPF, prog_fd) < 0) {
                err = -errno;
-- 
2.30.2