Messages in this thread Patch in this message |  | | From | Sun Ke <> | Subject | [PATCH] drivers/perf: fix return value check in ali_drw_pmu_probe() | Date | Sat, 24 Sep 2022 11:21:27 +0800 |
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In case of error, devm_ioremap_resource() returns ERR_PTR(), and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR().
Fixes: cf7b61073e45 ("drivers/perf: add DDR Sub-System Driveway PMU driver for Yitian 710 SoC") Signed-off-by: Sun Ke <sunke32@huawei.com> --- drivers/perf/alibaba_uncore_drw_pmu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/perf/alibaba_uncore_drw_pmu.c b/drivers/perf/alibaba_uncore_drw_pmu.c index 82729b874f09..a7689fecb49d 100644 --- a/drivers/perf/alibaba_uncore_drw_pmu.c +++ b/drivers/perf/alibaba_uncore_drw_pmu.c @@ -658,8 +658,8 @@ static int ali_drw_pmu_probe(struct platform_device *pdev) res = platform_get_resource(pdev, IORESOURCE_MEM, 0); drw_pmu->cfg_base = devm_ioremap_resource(&pdev->dev, res); - if (!drw_pmu->cfg_base) - return -ENOMEM; + if (IS_ERR(drw_pmu->cfg_base)) + return PTR_ERR(drw_pmu->cfg_base); name = devm_kasprintf(drw_pmu->dev, GFP_KERNEL, "ali_drw_%llx", (u64) (res->start >> ALI_DRW_PMU_PA_SHIFT)); -- 2.31.1
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