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Subject[PATCH 1/5] nvmem: imx-iim: use stack for nvmem_config instead of malloc'ing it
Date
nvmem_register() copies all the members of nvmem_config to
nvmem_device. So, nvmem_config is one-time use data during
probing. There is no point to keep it until the driver detach.
Using stack should be no problem because nvmem_config is pretty
small.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

drivers/nvmem/imx-iim.c | 27 ++++++++++++---------------
1 file changed, 12 insertions(+), 15 deletions(-)

diff --git a/drivers/nvmem/imx-iim.c b/drivers/nvmem/imx-iim.c
index 52ff65e..a599260 100644
--- a/drivers/nvmem/imx-iim.c
+++ b/drivers/nvmem/imx-iim.c
@@ -34,7 +34,6 @@ struct imx_iim_drvdata {
struct iim_priv {
void __iomem *base;
struct clk *clk;
- struct nvmem_config nvmem;
};

static int imx_iim_read(void *context, unsigned int offset,
@@ -108,7 +107,7 @@ static int imx_iim_probe(struct platform_device *pdev)
struct resource *res;
struct iim_priv *iim;
struct nvmem_device *nvmem;
- struct nvmem_config *cfg;
+ struct nvmem_config cfg = {};
const struct imx_iim_drvdata *drvdata = NULL;

iim = devm_kzalloc(dev, sizeof(*iim), GFP_KERNEL);
@@ -130,19 +129,17 @@ static int imx_iim_probe(struct platform_device *pdev)
if (IS_ERR(iim->clk))
return PTR_ERR(iim->clk);

- cfg = &iim->nvmem;
-
- cfg->name = "imx-iim",
- cfg->read_only = true,
- cfg->word_size = 1,
- cfg->stride = 1,
- cfg->owner = THIS_MODULE,
- cfg->reg_read = imx_iim_read,
- cfg->dev = dev;
- cfg->size = drvdata->nregs;
- cfg->priv = iim;
-
- nvmem = nvmem_register(cfg);
+ cfg.name = "imx-iim",
+ cfg.read_only = true,
+ cfg.word_size = 1,
+ cfg.stride = 1,
+ cfg.owner = THIS_MODULE,
+ cfg.reg_read = imx_iim_read,
+ cfg.dev = dev;
+ cfg.size = drvdata->nregs;
+ cfg.priv = iim;
+
+ nvmem = nvmem_register(&cfg);
if (IS_ERR(nvmem))
return PTR_ERR(nvmem);

--
2.7.4
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