[PATCH v2 2/6] crypto: caam - use devres to remove debugfs

[Andrey Smirnov]

Use devres to remove debugfs and drop corresponding
debugfs_remove_recursive() call.

Signed-off-by: Andrey Smirnov <andrew.smir...@gmail.com>
Reviewed-by: Horia Geantă <horia.gea...@nxp.com>
Cc: Chris Healy <cphe...@gmail.com>
Cc: Lucas Stach <l.st...@pengutronix.de>
Cc: Horia Geantă <horia.gea...@nxp.com>
Cc: Herbert Xu <herb...@gondor.apana.org.au>
Cc: Iuliana Prodan <iuliana.pro...@nxp.com>
Cc: linux-crypto@vger.kernel.org
Cc: linux-ker...@vger.kernel.org
---
 drivers/crypto/caam/ctrl.c   | 21 ++++++++++++++-------
 drivers/crypto/caam/intern.h |  1 -
 2 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index 35bf82d1bedc..254963498abc 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -327,11 +327,6 @@ static int caam_remove(struct platform_device *pdev)
        if (!ctrlpriv->mc_en && ctrlpriv->rng4_sh_init)
                deinstantiate_rng(ctrldev, ctrlpriv->rng4_sh_init);
 
-       /* Shut down debug views */
-#ifdef CONFIG_DEBUG_FS
-       debugfs_remove_recursive(ctrlpriv->dfs_root);
-#endif
-
        return 0;
 }
 
@@ -563,6 +558,13 @@ static int init_clocks(struct device *dev, const struct 
caam_imx_data *data)
        return devm_add_action_or_reset(dev, disable_clocks, ctrlpriv);
 }
 
+#ifdef CONFIG_DEBUG_FS
+static void caam_remove_debugfs(void *root)
+{
+       debugfs_remove_recursive(root);
+}
+#endif
+
 /* Probe routine for CAAM top (controller) level */
 static int caam_probe(struct platform_device *pdev)
 {
@@ -575,6 +577,7 @@ static int caam_probe(struct platform_device *pdev)
        struct caam_drv_private *ctrlpriv;
 #ifdef CONFIG_DEBUG_FS
        struct caam_perfmon *perfmon;
+       struct dentry *dfs_root;
 #endif
        u32 scfgr, comp_params;
        u8 rng_vid;
@@ -728,8 +731,12 @@ static int caam_probe(struct platform_device *pdev)
         */
        perfmon = (struct caam_perfmon __force *)&ctrl->perfmon;
 
-       ctrlpriv->dfs_root = debugfs_create_dir(dev_name(dev), NULL);
-       ctrlpriv->ctl = debugfs_create_dir("ctl", ctrlpriv->dfs_root);
+       dfs_root = debugfs_create_dir(dev_name(dev), NULL);
+       ret = devm_add_action_or_reset(dev, caam_remove_debugfs, dfs_root);
+       if (ret)
+               return ret;
+
+       ctrlpriv->ctl = debugfs_create_dir("ctl", dfs_root);
 #endif
 
        /* Check to see if (DPAA 1.x) QI present. If so, enable */
diff --git a/drivers/crypto/caam/intern.h b/drivers/crypto/caam/intern.h
index 731b06becd9c..359eb76d1259 100644
--- a/drivers/crypto/caam/intern.h
+++ b/drivers/crypto/caam/intern.h
@@ -102,7 +102,6 @@ struct caam_drv_private {
         * variables at runtime.
         */
 #ifdef CONFIG_DEBUG_FS
-       struct dentry *dfs_root;
        struct dentry *ctl; /* controller dir */
        struct debugfs_blob_wrapper ctl_kek_wrap, ctl_tkek_wrap, ctl_tdsk_wrap;
 #endif
-- 
2.21.0