perf: arm-ni: Fix an NULL vs IS_ERR() bug

The devm_ioremap() function never returns error pointers, it returns a
NULL pointer if there is an error.

Fixes: 4d5a7680f2b4 ("perf: Add driver for Arm NI-700 interconnect PMU")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/04d6ccc3-6d31-4f0f-ab0f-7a88342cc09a@stanley.mountain
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/drivers/perf/arm-ni.c b/drivers/perf/arm-ni.c
index b72df3aea93e3388c44c22f739a9233162ce6a07..90fcfe693439ef3e18e23c6351433ac3c5ea78b5 100644 (file)
--- a/drivers/perf/arm-ni.c
+++ b/drivers/perf/arm-ni.c
@@ -603,8 +603,8 @@ static int arm_ni_probe(struct platform_device *pdev)
         */
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
-       if (IS_ERR(base))
-               return PTR_ERR(base);
+       if (!base)
+               return -ENOMEM;
 
        arm_ni_probe_domain(base, &cfg);
        if (cfg.type != NI_GLOBAL)