drivers: CCI: fix the error handle in cci_pmu_probe()

This patch fix the error handle of function cci_pmu_probe():
- using IS_ERR() instead of NULL test for the return value of
  devm_ioremap_resource() since it nerver return NULL.
- remove kfree() for devm_kzalloc allocated memory
- remove dev_warn() since devm_ioremap_resource() has error message
  already.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Will Deacon <will.deacon@arm.com>

1 files changed, 7 insertions, 26 deletions

diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index dc6528e8b8fb..bb5b90e8e768 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -565,18 +565,9 @@ static int cci_pmu_probe(struct platform_device *pdev)
                 return -ENOMEM;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (!res) {
-                dev_warn(&pdev->dev, "Failed to get mem resource\n");
-                ret = -EINVAL;
-                goto memalloc_err;
-        };
-
         pmu->base = devm_ioremap_resource(&pdev->dev, res);
-        if (!pmu->base) {
-                dev_warn(&pdev->dev, "Failed to ioremap\n");
-                ret = -ENOMEM;
-                goto memalloc_err;
-        }
+        if (IS_ERR(pmu->base))
+                return -ENOMEM;
 
         /*
          * CCI PMU has 5 overflow signals - one per counter; but some may be tied
@@ -601,22 +592,18 @@ static int cci_pmu_probe(struct platform_device *pdev)
         if (i < CCI_PMU_MAX_HW_EVENTS) {
                 dev_warn(&pdev->dev, "In-correct number of interrupts: %d, should be %d\n",
                         i, CCI_PMU_MAX_HW_EVENTS);
-                ret = -EINVAL;
-                goto memalloc_err;
+                return -EINVAL;
         }
 
         pmu->port_ranges = port_range_by_rev();
         if (!pmu->port_ranges) {
                 dev_warn(&pdev->dev, "CCI PMU version not supported\n");
-                ret = -EINVAL;
-                goto memalloc_err;
+                return -EINVAL;
         }
 
         pmu->cci_pmu = devm_kzalloc(&pdev->dev, sizeof(*(pmu->cci_pmu)), GFP_KERNEL);
-        if (!pmu->cci_pmu) {
-                ret = -ENOMEM;
-                goto memalloc_err;
-        }
+        if (!pmu->cci_pmu)
+                return -ENOMEM;
 
         pmu->hw_events.events = pmu->events;
         pmu->hw_events.used_mask = pmu->used_mask;
@@ -624,15 +611,9 @@ static int cci_pmu_probe(struct platform_device *pdev)
 
         ret = cci_pmu_init(pmu->cci_pmu, pdev);
         if (ret)
-                goto pmuinit_err;
+                return ret;
 
         return 0;
-
-pmuinit_err:
-        kfree(pmu->cci_pmu);
-memalloc_err:
-        kfree(pmu);
-        return ret;
 }
 
 static int cci_platform_probe(struct platform_device *pdev)