diff options
| author | Sun Ke <sunke32@huawei.com> | 2022-09-24 11:21:27 +0800 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2022-10-07 14:47:38 +0100 |
| commit | ad0112f2d54cafee839e2ee99ec0b5fb9ce5c4b8 (patch) | |
| tree | 47f9961a64aa6b83b55d59c7db7408f393c6a3aa /drivers/perf/alibaba_uncore_drw_pmu.c | |
| parent | 171df58028bf4649460fb146a56a58dcb0c8f75a (diff) | |
| download | linux-ad0112f2d54cafee839e2ee99ec0b5fb9ce5c4b8.tar.bz2 | |
drivers/perf: fix return value check in ali_drw_pmu_probe()
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>
Acked-by: Will Deacon <will@kernel.org>
Reviewed-by: Shuai Xue <xueshuai@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220924032127.313156-1-sunke32@huawei.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'drivers/perf/alibaba_uncore_drw_pmu.c')
| -rw-r--r-- | drivers/perf/alibaba_uncore_drw_pmu.c | 4 |
1 files 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)); |