[PATCH v3 4/8] hwrng: omap - Remove global definition of hwrng
From: Romain Perier <hidden>
Date: 2016-09-16 10:12:16
Subsystem:
hardware random number generator core, omap random number generator support, the rest · Maintainers:
Olivia Mackall, Herbert Xu, Deepak Saxena, Linus Torvalds
The omap-rng driver currently assumes that there will only ever be a single instance of an RNG device. For this reason, there is a statically allocated struct hwrng, with a fixed name. However, registering two struct hwrng with the same isn't accepted by the RNG framework, so we need to switch to a dynamically allocated struct hwrng, each using a different name. Then, we define the name of this hwrng to "dev_name(dev)", so the name of the data structure is unique per device. Signed-off-by: Romain Perier <redacted> --- Changes in v2: - Fix the goto label used when there is an error for devm_kstrdup drivers/char/hw_random/omap-rng.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c
index b3f6047..5ea804d 100644
--- a/drivers/char/hw_random/omap-rng.c
+++ b/drivers/char/hw_random/omap-rng.c@@ -127,6 +127,7 @@ struct omap_rng_dev { void __iomem *base; struct device *dev; const struct omap_rng_pdata *pdata; + struct hwrng rng; }; static inline u32 omap_rng_read(struct omap_rng_dev *priv, u16 reg)
@@ -187,12 +188,6 @@ static void omap_rng_cleanup(struct hwrng *rng) priv->pdata->cleanup(priv); } -static struct hwrng omap_rng_ops = { - .name = "omap", - .read = omap_rng_do_read, - .init = omap_rng_init, - .cleanup = omap_rng_cleanup, -}; static inline u32 omap2_rng_data_present(struct omap_rng_dev *priv) {
@@ -365,7 +360,11 @@ static int omap_rng_probe(struct platform_device *pdev) if (!priv) return -ENOMEM; - omap_rng_ops.priv = (unsigned long)priv; + priv->rng.read = omap_rng_do_read; + priv->rng.init = omap_rng_init; + priv->rng.cleanup = omap_rng_cleanup; + + priv->rng.priv = (unsigned long)priv; platform_set_drvdata(pdev, priv); priv->dev = dev;
@@ -376,6 +375,12 @@ static int omap_rng_probe(struct platform_device *pdev) goto err_ioremap; } + priv->rng.name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL); + if (!priv->rng.name) { + ret = -ENOMEM; + goto err_ioremap; + } + pm_runtime_enable(&pdev->dev); ret = pm_runtime_get_sync(&pdev->dev); if (ret) {
@@ -389,7 +394,7 @@ static int omap_rng_probe(struct platform_device *pdev) if (ret) goto err_ioremap; - ret = hwrng_register(&omap_rng_ops); + ret = hwrng_register(&priv->rng); if (ret) goto err_register;
@@ -410,7 +415,7 @@ static int omap_rng_remove(struct platform_device *pdev) { struct omap_rng_dev *priv = platform_get_drvdata(pdev); - hwrng_unregister(&omap_rng_ops); + hwrng_unregister(&priv->rng); priv->pdata->cleanup(priv);
--
2.9.3