linux-kernel - [PATCH] HID: bpf: fix hid_bpf_input_report() when hid-core is not ready

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Message-Id: <20240411-fix-hid-bpf-v1-1-4ae913031a8c@kernel.org>
Date: Thu, 11 Apr 2024 09:05:56 +0200
From: Benjamin Tissoires <bentiss@...nel.org>
To: Jiri Kosina <jikos@...nel.org>, Benjamin Tissoires <bentiss@...nel.org>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] HID: bpf: fix hid_bpf_input_report() when hid-core is not
 ready

Reported by linux-next:
After merging the hid tree, today's linux-next build (x86_64 allmodconfig)
failed like this:

x86_64-linux-gnu-ld: vmlinux.o: in function `hid_bpf_input_report':
(.text+0x1c75181): undefined reference to `hid_input_report'

Caused by commit 9be50ac30a83 ("HID: bpf: allow to inject HID event
from BPF")

I just forgot to put the indirection in place.

Link: https://lore.kernel.org/linux-kernel/20240411105131.7830f966@canb.auug.org.au/
Signed-off-by: Benjamin Tissoires <bentiss@...nel.org>
---
Seems like an overlook in my patch.
---
 drivers/hid/bpf/hid_bpf_dispatch.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hid/bpf/hid_bpf_dispatch.c b/drivers/hid/bpf/hid_bpf_dispatch.c
index 79ece3d1b9e2..10289f44d0cc 100644
--- a/drivers/hid/bpf/hid_bpf_dispatch.c
+++ b/drivers/hid/bpf/hid_bpf_dispatch.c
@@ -534,7 +534,7 @@ hid_bpf_input_report(struct hid_bpf_ctx *ctx, enum hid_report_type type, u8 *buf
 
 	hdev = (struct hid_device *)ctx->hid; /* discard const */
 
-	return hid_input_report(hdev, type, buf, size, 0);
+	return hid_bpf_ops->hid_input_report(hdev, type, buf, size, 0);
 }
 __bpf_kfunc_end_defs();
 

---
base-commit: 685dadafbde29dc3d6b7a13be284d684b06d4d4f
change-id: 20240411-fix-hid-bpf-fb67411ac650

Best regards,
-- 
Benjamin Tissoires <bentiss@...nel.org>