diff options
| author | Will Deacon <will.deacon@arm.com> | 2016-03-21 12:07:15 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2016-03-21 12:36:17 +0100 |
| commit | 357b565d5d52b2dc2a51390eb8f887a9caa8597f (patch) | |
| tree | 0720017fa61ca0f3e6a152d30d82b4c2a1914fb5 /drivers/perf | |
| parent | arm64: perf: Extend ARMV8_EVTYPE_MASK to include PMCR.LC (diff) | |
| download | linux-357b565d5d52b2dc2a51390eb8f887a9caa8597f.tar.xz linux-357b565d5d52b2dc2a51390eb8f887a9caa8597f.zip | |
drivers/perf: arm_pmu: avoid NULL dereference when not using devicetree
Commit c6b90653f1f7 ("drivers/perf: arm_pmu: make info messages more
verbose") breaks booting on systems where the PMU is probed without
devicetree (e.g by inspecting the MIDR of the current CPU). In this case,
pdev->dev.of_node is NULL and we shouldn't try to access its ->fullname
field when printing probe error messages.
This patch fixes the probing code to use of_node_full_name, which safely
handles NULL nodes and removes the "Error %i" part of the string, since
it's not terribly useful.
Reported-by: Guenter Roeck <private@roeck-us.net>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/perf')
| -rw-r--r-- | drivers/perf/arm_pmu.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c index 11bacc7220a1..32346b5a8a11 100644 --- a/drivers/perf/arm_pmu.c +++ b/drivers/perf/arm_pmu.c @@ -1002,8 +1002,7 @@ int arm_pmu_device_probe(struct platform_device *pdev, } if (ret) { - pr_info("%s: failed to probe PMU! Error %i\n", - node->full_name, ret); + pr_info("%s: failed to probe PMU!\n", of_node_full_name(node)); goto out_free; } @@ -1023,8 +1022,8 @@ int arm_pmu_device_probe(struct platform_device *pdev, out_destroy: cpu_pmu_destroy(pmu); out_free: - pr_info("%s: failed to register PMU devices! Error %i\n", - node->full_name, ret); + pr_info("%s: failed to register PMU devices!\n", + of_node_full_name(node)); kfree(pmu); return ret; } |