drivers: perf: marvell_cn10k: fix an IS_ERR() vs NULL check

The devm_ioremap() function does not return error pointers.  It returns
NULL.

Fixes: 036a7584bede ("drivers: perf: Add LLC-TAD perf counter support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20211217145907.GA16611@kili
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/drivers/perf/marvell_cn10k_tad_pmu.c b/drivers/perf/marvell_cn10k_tad_pmu.c
index 250dd4c..7f4d292 100644 (file)
--- a/drivers/perf/marvell_cn10k_tad_pmu.c
+++ b/drivers/perf/marvell_cn10k_tad_pmu.c
@@ -312,7 +312,7 @@ static int tad_pmu_probe(struct platform_device *pdev)
                regions[i].base = devm_ioremap(&pdev->dev,
                                               res->start,
                                               tad_pmu_page_size);
-               if (IS_ERR(regions[i].base)) {
+               if (!regions[i].base) {
                        dev_err(&pdev->dev, "TAD%d ioremap fail\n", i);
                        return -ENOMEM;
                }