From: Suniel Mahesh <sunil.m@xxxxxxxxxxxx>
It is recommended to use managed function devm_kzalloc, which
simplifies driver cleanup paths and driver code.
This patch does the following:
(a) replace kzalloc with devm_kzalloc.
(b) drop kfree(), because memory allocated with devm_kzalloc() is
automatically freed on driver detach, otherwise it leads to a double
free.
(c) remove unnecessary blank lines.
Signed-off-by: Suniel Mahesh <sunil.m@xxxxxxxxxxxx>
---
Changes for v2:
- Changes done as suggested by Greg-KH.
- Rebased on top of next-20170718.
---
Note:
- Patch was tested and built(ARCH=arm) on next-20170718.
No build issues reported, however it was not tested on
real hardware.
---
drivers/staging/ccree/ssi_driver.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/drivers/staging/ccree/ssi_driver.c b/drivers/staging/ccree/ssi_driver.c
index d7b9a63..e918cf4 100644
--- a/drivers/staging/ccree/ssi_driver.c
+++ b/drivers/staging/ccree/ssi_driver.c
@@ -223,13 +223,15 @@ static int init_cc_resources(struct platform_device *plat_dev)
struct resource *req_mem_cc_regs = NULL;
void __iomem *cc_base = NULL;
bool irq_registered = false;
- struct ssi_drvdata *new_drvdata = kzalloc(sizeof(struct ssi_drvdata), GFP_KERNEL);
+ struct ssi_drvdata *new_drvdata;
struct device *dev = &plat_dev->dev;
struct device_node *np = dev->of_node;
u32 signature_val;
int rc = 0;
- if (unlikely(!new_drvdata)) {
+ new_drvdata = devm_kzalloc(&plat_dev->dev, sizeof(*new_drvdata),
+ GFP_KERNEL);
+ if (!new_drvdata) {
SSI_LOG_ERR("Failed to allocate drvdata");
rc = -ENOMEM;
goto init_cc_res_err;
@@ -434,10 +436,8 @@ static int init_cc_resources(struct platform_device *plat_dev)
resource_size(new_drvdata->res_mem));
new_drvdata->res_mem = NULL;
}
- kfree(new_drvdata);
dev_set_drvdata(&plat_dev->dev, NULL);
}
-
return rc;
}
@@ -478,8 +478,6 @@ static void cleanup_cc_resources(struct platform_device *plat_dev)
drvdata->cc_base = NULL;
drvdata->res_mem = NULL;
}
-
- kfree(drvdata);
dev_set_drvdata(&plat_dev->dev, NULL);
}
--
1.9.1
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