| Message ID | 20220304172852.274126-25-benjamin.tissoires@redhat.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | BPF |
| Headers | show |
| Series | Introduce eBPF support for HID devices | expand |
| Context | Check | Description |
|---|---|---|
| bpf/vmtest-bpf-next-PR | fail | PR summary |
| bpf/vmtest-bpf-next | fail | VM_Test |
| netdev/tree_selection | success | Clearly marked for bpf-next |
| netdev/fixes_present | success | Fixes tag not required for -next series |
| netdev/subject_prefix | success | Link |
| netdev/cover_letter | success | Series has a cover letter |
| netdev/patch_count | fail | Series longer than 15 patches (and no cover letter) |
| netdev/header_inline | success | No static functions without inline keyword in header files |
| netdev/build_32bit | success | Errors and warnings before: 0 this patch: 0 |
| netdev/cc_maintainers | success | CCed 13 of 13 maintainers |
| netdev/build_clang | fail | Errors and warnings before: 11 this patch: 11 |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Signed-off-by tag matches author and committer |
| netdev/verify_fixes | success | No Fixes tag |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 0 this patch: 0 |
| netdev/checkpatch | warning | WARNING: line length of 83 exceeds 80 columns |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/source_inline | success | Was 0 now: 0 |
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index d0e015986e17..2b49f6064a40 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -1751,10 +1751,13 @@ int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, u32 size, u8 *cdata; int ret = 0; - data = hid_bpf_raw_event(hid, data, &size); - if (IS_ERR(data)) { - ret = PTR_ERR(data); - goto out; + /* we pre-test if ctx is available here to cut the calls at the earliest */ + if (hid->bpf.ctx) { + data = hid_bpf_raw_event(hid, data, &size); + if (IS_ERR(data)) { + ret = PTR_ERR(data); + goto out; + } } report = hid_get_report(report_enum, data);
the context is allocated the first time a program of type DEVICE_EVENT is attached to the device. To not add too much jumps in the code for the general device handling, call hid_bpf_raw_event() only if we know that a program has been attached once during the life of the device. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> --- new in v2 --- drivers/hid/hid-core.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)