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authorHimangi Saraogi <himangi774@gmail.com>2014-05-10 22:49:00 +0400
committerHerbert Xu <herbert@gondor.apana.org.au>2014-05-13 15:43:48 +0400
commit0118a552137506a68ac062981967d8b5147e6028 (patch)
tree0e79b9f1fa818fe7faa4bf233c0fb17eb9e52f58 /drivers/char/hw_random/n2-drv.c
parent80cd88f2f54a01c8cdb459a3ee0569b25bb3d26a (diff)
downloadlinux-0118a552137506a68ac062981967d8b5147e6028.tar.xz
hwrng: n2-drv - Introduce the use of the managed version of kzalloc
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 <himangi774@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char/hw_random/n2-drv.c')
-rw-r--r--drivers/char/hw_random/n2-drv.c24
1 files changed, 7 insertions, 17 deletions
diff --git a/drivers/char/hw_random/n2-drv.c b/drivers/char/hw_random/n2-drv.c
index 432232eefe05..292a5889f675 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;
}