Author: Himangi Saraogi <himangi774@gmail.com>
This patch moves data allocated using kzalloc to managed data allocated
using devm_kzalloc and cleans now unnecessary kfrees in probe and remove
functions. The NULL assignment to np->units is removed as there is no
interaction between this field and sun4v_hvapi_unregister. Also, the
labels out_free_units and out_free are removed as they are no longer
required.
The following Coccinelle semantic patch was used for making the change:
@platform@
identifier p, probefn, removefn;
@@
struct platform_driver p = {
.probe = probefn,
.remove = removefn,
};
@prb@
identifier platform.probefn, pdev;
expression e, e1, e2;
@@
probefn(struct platform_device *pdev, ...) {
<+...
- e = kzalloc(e1, e2)
+ e = devm_kzalloc(&pdev->dev, e1, e2)
...
?-kfree(e);
...+>
}
@rem depends on prb@
identifier platform.removefn;
expression e;
@@
removefn(...) {
<...
- kfree(e);
...>
}
Signed-off-by: Himangi Saraogi
Signed-off-by: Herbert Xu
---
drivers/char/hw_random/n2-drv.c | 24 +++++++-----------------
1 file changed, 7 insertions(+), 17 deletions(-)
diff --git a/drivers/char/hw_random/n2-drv.c b/drivers/char/hw_random/n2-drv.c
index 432232e..292a588 100644
--- a/drivers/char/hw_random/n2-drv.c
+++ b/drivers/char/hw_random/n2-drv.c
@@ -632,7 +632,7 @@ static int n2rng_probe(struct platform_device *op)
multi_capable = (match->data != NULL);
n2rng_driver_version();
- np = kzalloc(sizeof(*np), GFP_KERNEL);
+ np = devm_kzalloc(&op->dev, sizeof(*np), GFP_KERNEL);
if (!np)
goto out;
np->op = op;
@@ -653,7 +653,7 @@ static int n2rng_probe(struct platform_device *op)
&np->hvapi_minor)) {
dev_err(&op->dev, "Cannot register suitable "
"HVAPI version.\n");
- goto out_free;
+ goto out;
}
}
@@ -676,15 +676,16 @@ static int n2rng_probe(struct platform_device *op)
dev_info(&op->dev, "Registered RNG HVAPI major %lu minor %lu\n",
np->hvapi_major, np->hvapi_minor);
- np->units = kzalloc(sizeof(struct n2rng_unit) * np->num_units,
- GFP_KERNEL);
+ np->units = devm_kzalloc(&op->dev,
+ sizeof(struct n2rng_unit) * np->num_units,
+ GFP_KERNEL);
err = -ENOMEM;
if (!np->units)
goto out_hvapi_unregister;
err = n2rng_init_control(np);
if (err)
- goto out_free_units;
+ goto out_hvapi_unregister;
dev_info(&op->dev, "Found %s RNG, units: %d\n",
((np->flags & N2RNG_FLAG_MULTI) ?
@@ -697,7 +698,7 @@ static int n2rng_probe(struct platform_device *op)
err = hwrng_register(&np->hwrng);
if (err)
- goto out_free_units;
+ goto out_hvapi_unregister;
platform_set_drvdata(op, np);
@@ -705,15 +706,9 @@ static int n2rng_probe(struct platform_device *op)
return 0;
-out_free_units:
- kfree(np->units);
- np->units = NULL;
-
out_hvapi_unregister:
sun4v_hvapi_unregister(HV_GRP_RNG);
-out_free:
- kfree(np);
out:
return err;
}
@@ -730,11 +725,6 @@ static int n2rng_remove(struct platform_device *op)
sun4v_hvapi_unregister(HV_GRP_RNG);
- kfree(np->units);
- np->units = NULL;
-
- kfree(np);
-
return 0;
} |
---
drivers/char/hw_random/n2-drv.c | 24 +++++++-----------------
1 file changed, 7 insertions(+), 17 deletions(-)
diff --git a/drivers/char/hw_random/n2-drv.c b/drivers/char/hw_random/n2-drv.c
index 432232e..292a588 100644
--- a/drivers/char/hw_random/n2-drv.c
+++ b/drivers/char/hw_random/n2-drv.c
@@ -632,7 +632,7 @@ static int n2rng_probe(struct platform_device *op)
multi_capable = (match->data != NULL);
n2rng_driver_version();
- np = kzalloc(sizeof(*np), GFP_KERNEL);
+ np = devm_kzalloc(&op->dev, sizeof(*np), GFP_KERNEL);
if (!np)
goto out;
np->op = op;
@@ -653,7 +653,7 @@ static int n2rng_probe(struct platform_device *op)
&np->hvapi_minor)) {
dev_err(&op->dev, "Cannot register suitable "
"HVAPI version.\n");
- goto out_free;
+ goto out;
}
}
@@ -676,15 +676,16 @@ static int n2rng_probe(struct platform_device *op)
dev_info(&op->dev, "Registered RNG HVAPI major %lu minor %lu\n",
np->hvapi_major, np->hvapi_minor);
- np->units = kzalloc(sizeof(struct n2rng_unit) * np->num_units,
- GFP_KERNEL);
+ np->units = devm_kzalloc(&op->dev,
+ sizeof(struct n2rng_unit) * np->num_units,
+ GFP_KERNEL);
err = -ENOMEM;
if (!np->units)
goto out_hvapi_unregister;
err = n2rng_init_control(np);
if (err)
- goto out_free_units;
+ goto out_hvapi_unregister;
dev_info(&op->dev, "Found %s RNG, units: %d\n",
((np->flags & N2RNG_FLAG_MULTI) ?
@@ -697,7 +698,7 @@ static int n2rng_probe(struct platform_device *op)
err = hwrng_register(&np->hwrng);
if (err)
- goto out_free_units;
+ goto out_hvapi_unregister;
platform_set_drvdata(op, np);
@@ -705,15 +706,9 @@ static int n2rng_probe(struct platform_device *op)
return 0;
-out_free_units:
- kfree(np->units);
- np->units = NULL;
-
out_hvapi_unregister:
sun4v_hvapi_unregister(HV_GRP_RNG);
-out_free:
- kfree(np);
out:
return err;
}
@@ -730,11 +725,6 @@ static int n2rng_remove(struct platform_device *op)
sun4v_hvapi_unregister(HV_GRP_RNG);
- kfree(np->units);
- np->units = NULL;
-
- kfree(np);
-
return 0;
}
