ARC: perf: avoid kernel killing where it is possible (29133260) · Commits · 戴 / test

arch/arc/kernel/perf_event.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -580,10 +580,12 @@ static int arc_pmu_device_probe(struct platform_device *pdev)
		return -ENODEV;
		}
		BUILD_BUG_ON(ARC_PERF_MAX_COUNTERS > 32);
		BUG_ON(pct_bcr.c > ARC_PERF_MAX_COUNTERS);
		if (WARN_ON(pct_bcr.c > ARC_PERF_MAX_COUNTERS))
		return -EINVAL;

		READ_BCR(ARC_REG_CC_BUILD, cc_bcr);
		BUG_ON(!cc_bcr.v); /* Counters exist but No countable conditions ? */
		if (WARN(!cc_bcr.v, "Counters exist but No countable conditions?"))
		return -EINVAL;

		arc_pmu = devm_kzalloc(&pdev->dev, sizeof(struct arc_pmu), GFP_KERNEL);
		if (!arc_pmu)