Since [1], the kernel has a new flag: CAN_ERR_CNT to notify whether or
not the error counter is set. Use this to decide whether on not the
error-counter-tx-rx should be printed.
For interoperability reasons, use an #ifdef so that the code still
work if built on older kernels.
[1] commit 3e5c291c7942 ("can: add CAN_ERR_CNT flag to notify
availability of error counter")
Link: https://git.kernel.org/torvalds/linux/c/3e5c291c7942
Signed-off-by: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx>
---
lib.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/lib.c b/lib.c
index 3c1a0d9..fb08c0b 100644
--- a/lib.c
+++ b/lib.c
@@ -679,7 +679,11 @@ void snprintf_can_error_frame(char *buf, size_t len, const struct canfd_frame *c
}
}
+#ifdef CAN_ERR_CNT
+ if (cf->can_id & CAN_ERR_CNT) {
+#else
if (cf->data[6] || cf->data[7]) {
+#endif
n += snprintf(buf + n, len - n, "%s", sep);
n += snprintf(buf + n, len - n, "error-counter-tx-rx{{%d}{%d}}",
cf->data[6], cf->data[7]);
--
2.37.4
