Claude review: drm/ras: Cancel and free message on get counter failure

[Claude Code Review Bot <claude-review@example.com>]

Patch Review

**Verdict: Good fix, correct.**

The original code had two issues in `doit_reply_value()`:
1. When `get_node_error_counter()` failed, `msg` (the sk_buff) and `hdr` (the genetlink header) were leaked.
2. The existing error handling for `msg_reply_value()` failure had its own cleanup copy-paste.

The goto-based consolidation is clean and handles the `hdr == NULL` case correctly — when `genlmsg_iput()` fails, the jump goes to `free_msg` (skipping `genlmsg_cancel`), which is right since there's no valid header to cancel:

```c
cancel_msg:
	genlmsg_cancel(msg, hdr);
free_msg:
	nlmsg_free(msg);
	return ret;
```

No issues.

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Generated by Claude Code Patch Reviewer